nih-gov/www.ncbi.nlm.nih.gov/omim/609016

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<title>
Entry
- #609016 - LONG-CHAIN 3-HYDROXYACYL-CoA DEHYDROGENASE DEFICIENCY
- OMIM
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<span class="h4">#609016</span>
<br />
<strong>Table of Contents</strong>
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<a href="#title"><strong>Title</strong></a>
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<a href="#phenotypeMap"><strong>Phenotype-Gene Relationships</strong></a>
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<a href="/clinicalSynopsis/609016"><strong>Clinical Synopsis</strong></a>
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<a href="#text"><strong>Text</strong></a>
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<a href="#description">Description</a>
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<a href="#clinicalFeatures">Clinical Features</a>
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<a href="#biochemicalFeatures">Biochemical Features</a>
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<a href="#clinicalManagement">Clinical Management</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#molecularGenetics">Molecular Genetics</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#inheritance">Inheritance</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#populationGenetics">Population Genetics</a>
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<a href="#seeAlso"><strong>See Also</strong></a>
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<a href="#references"><strong>References</strong></a>
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<a href="#contributors"><strong>Contributors</strong></a>
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<li role="presentation">
<a href="#creationDate"><strong>Creation Date</strong></a>
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<div><a href="https://clinicaltrials.gov/search?cond=LONG-CHAIN 3-HYDROXYACYL-CoA DEHYDROGENASE DEFICIENCY" class="mim-tip-hint" title="A registry of federally and privately supported clinical trials conducted in the United States and around the world." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Clinical Trials', 'domain': 'clinicaltrials.gov'})">Clinical Trials</a></div>
<div><a href="https://www.orpha.net/consor/cgi-bin/ClinicalLabs_Search_Simple.php?lng=EN&LnkId=3555&Typ=Pat" class="mim-tip-hint" title="A list of European laboratories that offer genetic testing." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'EuroGentest', 'domain': 'orpha.net'})">EuroGentest</a></div>
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<div><a href="https://medlineplus.gov/genetics/condition/long-chain-3-hydroxyacyl-coa-dehydrogenase-deficiency" class="mim-tip-hint" title="Consumer-friendly information about the effects of genetic variation on human health." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'MedlinePlus Genetics', 'domain': 'medlineplus.gov'})">MedlinePlus Genetics</a></div>
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<div class="panel-heading mim-panel-heading" role="tab" id="mimCellLines">
<span class="panel-title">
<span class="small">
<a href="#mimCellLinesLinksFold" id="mimCellLinesLinksToggle" class="collapsed mimSingletonTriangleToggle" role="button" data-toggle="collapse" data-parent="#mimExternalLinksAccordion">
<div style="display: table-row">
<div id="mimCellLinesLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5; display: table-cell;">&#9658;</div>
&nbsp;
<div style="display: table-cell;">Cell Lines</div>
</div>
</a>
</span>
</span>
</div>
<div id="mimCellLinesLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel">
<div class="panel-body small mim-panel-body">
<div><a href="https://catalog.coriell.org/Search?q=OmimNum:609016" class="definition" title="Coriell Cell Repositories; cell cultures and DNA derived from cell cultures." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'CCR', 'domain': 'ccr.coriell.org'})">Coriell</a></div>
</div>
</div>
</div>
</div>
</div>
</div>
<span>
<span class="mim-tip-bottom" qtip_title="<strong>Looking for this gene or this phenotype in other resources?</strong>" qtip_text="Select a related resource from the dropdown menu and click for a targeted link to information directly relevant.">
&nbsp;
</span>
</span>
</div>
<div class="col-lg-8 col-lg-pull-2 col-md-8 col-md-pull-2 col-sm-8 col-sm-pull-2 col-xs-12">
<div>
<a id="title" class="mim-anchor"></a>
<div>
<a id="number" class="mim-anchor"></a>
<div class="text-right">
<a href="#" class="mim-tip-icd" qtip_title="<strong>ICD+</strong>" qtip_text="
<strong>SNOMEDCT:</strong> 726021008<br />
<strong>ORPHA:</strong> 5<br />
">ICD+</a>
</div>
<div>
<span class="h3">
<span class="mim-font mim-tip-hint" title="Phenotype description, molecular basis known">
<span class="text-danger"><strong>#</strong></span>
609016
</span>
</span>
</div>
</div>
<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
LONG-CHAIN 3-HYDROXYACYL-CoA DEHYDROGENASE DEFICIENCY
</span>
</h3>
</div>
<div>
<br />
</div>
<div>
<a id="alternativeTitles" class="mim-anchor"></a>
<div>
<p>
<span class="mim-font">
<em>Alternative titles; symbols</em>
</span>
</p>
</div>
<div>
<h4>
<span class="mim-font">
LCHAD DEFICIENCY
</span>
</h4>
</div>
</div>
<div>
<br />
</div>
</div>
<div>
<a id="phenotypeMap" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>Phenotype-Gene Relationships</strong>
</span>
</h4>
<div>
<table class="table table-bordered table-condensed table-hover small mim-table-padding">
<thead>
<tr class="active">
<th>
Location
</th>
<th>
Phenotype
</th>
<th>
Phenotype <br /> MIM number
</th>
<th>
Inheritance
</th>
<th>
Phenotype <br /> mapping key
</th>
<th>
Gene/Locus
</th>
<th>
Gene/Locus <br /> MIM number
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/2/103?start=-3&limit=10&highlight=103">
2p23.3
</a>
</span>
</td>
<td>
<span class="mim-font">
LCHAD deficiency
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609016"> 609016 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
HADHA
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600890"> 600890 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/2/103?start=-3&limit=10&highlight=103">
2p23.3
</a>
</span>
</td>
<td>
<span class="mim-font">
HELLP syndrome, maternal, of pregnancy
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609016"> 609016 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
HADHA
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600890"> 600890 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/2/103?start=-3&limit=10&highlight=103">
2p23.3
</a>
</span>
</td>
<td>
<span class="mim-font">
Fatty liver, acute, of pregnancy
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609016"> 609016 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
HADHA
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600890"> 600890 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="btn-group ">
<a href="/clinicalSynopsis/609016" class="btn btn-warning" role="button"> Clinical Synopsis </a>
<button type="button" id="mimPhenotypicSeriesToggle" class="btn btn-warning dropdown-toggle mimSingletonFoldToggle" data-toggle="collapse" href="#mimClinicalSynopsisFold" onclick="ga('send', 'event', 'Unfurl', 'ClinicalSynopsis', 'omim.org')">
<span class="caret"></span>
<span class="sr-only">Toggle Dropdown</span>
</button>
</div>
&nbsp;
<div class="btn-group">
<button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
PheneGene Graphics <span class="caret"></span>
</button>
<ul class="dropdown-menu" style="width: 17em;">
<li><a href="/graph/linear/609016" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/609016" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Radial'})"> Radial </a></li>
</ul>
</div>
<span class="glyphicon glyphicon-question-sign mim-tip-hint" title="OMIM PheneGene graphics depict relationships between phenotypes, groups of related phenotypes (Phenotypic Series), and genes.<br /><a href='/static/omim/pdf/OMIM_Graphics.pdf' target='_blank'>A quick reference overview and guide (PDF)</a>"></span>
<div>
<p />
</div>
<div id="mimClinicalSynopsisFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small" style="margin: 5px">
<div>
<div>
<span class="h5 mim-font">
<strong> INHERITANCE </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Autosomal recessive <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/258211005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">258211005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0441748&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0441748</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> GROWTH </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Other </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Failure to thrive <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/432788009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">432788009</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/54840006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">54840006</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/783.41" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">783.41</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0015544&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0015544</a>, <a href="https://bioportal.bioontology.org/search?q=C2315100&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2315100</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001508" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001508</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001508" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001508</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> HEAD & NECK </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Eyes </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Pigmentary retinopathy <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/28835009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">28835009</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/H35.52" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H35.52</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4551715&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4551715</a>, <a href="https://bioportal.bioontology.org/search?q=C0035334&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0035334</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000510" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000510</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0000580" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000580</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000580" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000580</a>]</span><br /> -
Visual impairment <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/246635007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">246635007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/7973008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">7973008</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/397540003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">397540003</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0042798&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0042798</a>, <a href="https://bioportal.bioontology.org/search?q=C3665347&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3665347</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000505" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000505</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000505" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000505</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> CARDIOVASCULAR </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Heart </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Cardiomyopathy <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/85898001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">85898001</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/57809008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">57809008</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/I51.5" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">I51.5</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/I42" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">I42</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/I42.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">I42.9</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/425" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">425</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0878544&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0878544</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001638" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001638</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001638" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001638</a>]</span><br /> -
Arrhythmias <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/698247007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">698247007</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/I49.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">I49.9</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/427.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">427.9</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/427" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">427</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0003811&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0003811</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0011675" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0011675</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0011675" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0011675</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> ABDOMEN </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Liver </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Hepatomegaly <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/80515008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">80515008</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R16.0" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R16.0</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/789.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">789.1</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0019209&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0019209</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002240" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002240</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002240" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002240</a>]</span><br /> -
Cholestatic liver disease <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0860204&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0860204</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002611" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002611</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002611" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002611</a>]</span><br /> -
Fatty liver <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/442191002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">442191002</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/197321007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">197321007</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C2711227&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2711227</a>, <a href="https://bioportal.bioontology.org/search?q=C0015695&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0015695</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001397" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001397</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001397" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001397</a>]</span><br /> -
Hepatic failure <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/59927004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">59927004</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/K72.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">K72.9</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0085605&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0085605</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001399" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001399</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001399" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001399</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Gastrointestinal </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Feeding problems <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/274540003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">274540003</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/78164000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">78164000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R63.3" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R63.3</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/783.3" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">783.3</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0232466&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0232466</a>, <a href="https://bioportal.bioontology.org/search?q=C0699815&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0699815</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0011968" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0011968</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0011968" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0011968</a>]</span><br /> -
Vomiting <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/422400008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">422400008</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/300359004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">300359004</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/249497008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">249497008</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R11.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R11.1</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/R11.10" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R11.10</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0042963&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0042963</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002013" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002013</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002013" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002013</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MUSCLE, SOFT TISSUES </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Muscle cramps <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/45352006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">45352006</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/55300003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">55300003</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/M62.83" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">M62.83</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/728.85" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">728.85</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0037763&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0037763</a>, <a href="https://bioportal.bioontology.org/search?q=C0026821&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0026821</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003394" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003394</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003394" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003394</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> NEUROLOGIC </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Central Nervous System </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Microcephaly <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/1148757008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">1148757008</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q02" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q02</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/742.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">742.1</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4551563&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4551563</a>, <a href="https://bioportal.bioontology.org/search?q=C0025958&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0025958</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000252" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000252</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000252" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000252</a>]</span> <a href="https://elementsofmorphology.nih.gov/index.cgi?tid=0584d323b99dcd7001cc50e224947aca" target="_blank" class="small mim-tip-eom" title="&lt;img src=&quot;https://elementsofmorphology.nih.gov/images/terms/Microcephaly-small.jpg&quot;&gt; &lt;br/&gt;Further Information: &lt;a href=&quot;https://elementsofmorphology.nih.gov/index.cgi?tid=0584d323b99dcd7001cc50e224947aca&quot target=&quot;_blank&quot onclick=&quot;gtag(\'event\', \'mim_outbound\', {\'name\': \'EOM\', \'domain\': \'elementsofmorphology.nih.gov\'})&quot;&gt;Elements of Morphology&lt;/a&gt;"><span class="glyphicon glyphicon-user" aria-hidden="true"></span></a><br /> -
Hypotonia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/398151007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">398151007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/398152000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">398152000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0026827&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0026827</a>, <a href="https://bioportal.bioontology.org/search?q=C1858120&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1858120</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001290" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001290</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0001252" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001252</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001252" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001252</a>]</span><br /> -
Seizures <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/91175000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">91175000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0036572&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0036572</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001250" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001250</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001250" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001250</a>]</span><br /> -
Coma <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/371632003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">371632003</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405809000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405809000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R40.20" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R40.20</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/R40.2" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R40.2</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/780.01" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">780.01</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0543874&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0543874</a>, <a href="https://bioportal.bioontology.org/search?q=C3146279&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3146279</a>, <a href="https://bioportal.bioontology.org/search?q=C0009421&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0009421</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001259" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001259</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001259" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001259</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Peripheral Nervous System </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Peripheral neuropathy <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/42658009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">42658009</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/302226006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">302226006</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/G64" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">G64</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/350-359.99" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">350-359.99</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4721453&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4721453</a>, <a href="https://bioportal.bioontology.org/search?q=C0031117&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0031117</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0009830" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0009830</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0000759" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000759</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0001271" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001271</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0009830" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0009830</a>]</span><br />
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<strong> METABOLIC FEATURES </strong>
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- Hypoketotic hypoglycemia <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1856438&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1856438</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001985" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001985</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001985" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001985</a>]</span><br /> -
Recurrent metabolic crises <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5436286&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5436286</a>]</span><br />
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<strong> PRENATAL MANIFESTATIONS </strong>
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<em> Maternal </em>
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<div style="margin-left: 2em;">
<span class="mim-font">
- HELLP (hemolysis, elevated liver enzymes, low platelets) syndrome <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/95605009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">95605009</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/O14.2" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">O14.2</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0162739&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0162739</a>]</span><br /> -
AFLP (acute fatty liver of pregnancy) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/716379000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">716379000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1455728&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1455728</a>]</span><br /> -
Hyperemesis gravidarum <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/14094001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">14094001</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/O21" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">O21</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/643" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">643</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0020450&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0020450</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0012188" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0012188</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0012188" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0012188</a>]</span><br />
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<strong> LABORATORY ABNORMALITIES </strong>
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<div style="margin-left: 2em;">
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- Deficiency of long-chain 3-hydroxyacyl-CoA dehydrogenase <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/726021008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">726021008</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3711645&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3711645</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0100950" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0100950</a>]</span><br /> -
Elevated urinary 3-hydroxy-dicarboxylic acids <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5542659&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5542659</a>]</span><br /> -
Elevated plasma 3-hydroxyacyl-carnitines <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5542660&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5542660</a>]</span><br /> -
Decreased total carnitine <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5542661&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5542661</a>]</span><br /> -
Elevated lactic acid <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5542662&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5542662</a>]</span><br /> -
Elevated ammonia <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C2675918&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2675918</a>]</span><br /> -
Increased liver enzymes <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0235996&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0235996</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002910" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002910</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002910" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002910</a>]</span><br /> -
Elevated creatine kinase <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/432352001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">432352001</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0853034&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0853034</a>, <a href="https://bioportal.bioontology.org/search?q=C0151576&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0151576</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003236" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003236</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003236" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003236</a>]</span><br />
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<span class="h5 mim-font">
<strong> MISCELLANEOUS </strong>
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<div>
<span class="mim-font">
- Sudden, unexplained death (in some patients)<br /> -
Age at presentation - mean 5.8 months (range 1 day-26 months)<br /> -
Episodic illness precipitated by fasting or illness<br />
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<span class="h5 mim-font">
<strong> MOLECULAR BASIS </strong>
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<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Caused by mutation in hydroxyacyl-CoA dehydrogenase/3-ketoacyl-CoA thiolase/enoyl-CoA hydratase, alpha subunit (HADHA<a href="/entry/600890#0001">600890.0001</a>)<br />
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because LCHAD deficiency is caused by homozygous or compound heterozygous mutations in the gene encoding long-chain hydroxyacyl-CoA dehydrogenase (HADHA; <a href="/entry/600890">600890</a>).</p><p>Complete mitochondrial trifunctional protein deficiency (<a href="/entry/609015">609015</a>) is a less common disorder that is also caused by mutation in the HADHA gene.</p>
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<strong>Description</strong>
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<p>Isolated deficiency of long-chain 3-hydroxyl-CoA dehydrogenase (LCHAD) is an autosomal recessive disorder characterized by early-onset cardiomyopathy, hypoglycemia, neuropathy, and pigmentary retinopathy, and sudden death (<a href="#13" class="mim-tip-reference" title="IJlst, L., Ruiter, J. P. N., Hoovers, J. M. N., Jakobs, M. E., Wanders, R. J. A. &lt;strong&gt;Common missense mutation G1528C in long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: characterization and expression of the mutant protein, mutation analysis on genomic DNA and chromosomal localization of the mitochondrial trifunctional protein alpha subunit gene.&lt;/strong&gt; J. Clin. Invest. 98: 1028-1033, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8770876/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8770876&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1172/JCI118863&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8770876">IJlst et al., 1996</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8770876" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>Clinical Features</strong>
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<p><a href="#28" class="mim-tip-reference" title="Wanders, R. J. A., Duran, M., Ijlst, L., de Jager, J. P., van Gennip, A. H., Jakobs, C., Dorland, L., van Sprang, F. J. &lt;strong&gt;Sudden infant death and long-chain 3-hydroxyacyl-CoA dehydrogenase. (Letter)&lt;/strong&gt; Lancet 334: 52-53, 1989. Note: Originally Volume II.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/2567831/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;2567831&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0140-6736(89)90300-0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="2567831">Wanders et al. (1989)</a> described sudden infant death syndrome (SIDS) in a 3-day-old infant caused by deficiency of long-chain 3-hydroxyacyl-CoA dehydrogenase. <a href="#5" class="mim-tip-reference" title="Duran, M., Wanders, R. J. A., de Jager, J. P., Dorland, L., Bruinvis, L., Ketting, D., Ijlst, L., van Sprang, F. J. &lt;strong&gt;3-Hydroxydicarboxylic aciduria due to long-chain 3-hydroxyacyl-coenzyme A dehydrogenase deficiency associated with sudden neonatal death: protective effect of medium-chain triglyceride treatment.&lt;/strong&gt; Europ. J. Pediat. 150: 190-195, 1991.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/2044590/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;2044590&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/BF01963564&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="2044590">Duran et al. (1991)</a> reported that the younger sister of this patient began at the age of 5 months to have feeding problems, lowered consciousness, and liver dysfunction. Plasma long-chain acylcarnitine was increased. A clue to the diagnosis was given by the results of a phenylpropionic acid loading test. On a diet enriched with medium-chain triglycerides, the patient started to thrive, signs of cardiomyopathy disappeared, and her liver function returned to normal. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=2044590+2567831" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#18" class="mim-tip-reference" title="Rocchiccioli, F., Wanders, R. J. A., Aubourg, P., Vianey-Liaud, C., Ijlst, L., Fabre, M., Cartier, N., Bougneres, P.-F. &lt;strong&gt;Deficiency of long-chain 3-hydroxyacyl-CoA dehydrogenase: a cause of lethal myopathy and cardiomyopathy in early childhood.&lt;/strong&gt; Pediat. Res. 28: 657-662, 1990.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/2284166/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;2284166&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1203/00006450-199012000-00023&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="2284166">Rocchiccioli et al. (1990)</a> described an infant with LCHAD deficiency who developed recurrent hypoglycemia in early infancy and died at 9 months of age from a rapidly progressive myopathy and cardiomyopathy. The activities of long-, medium-, and short-chain acyl-CoA dehydrogenases (<a href="/entry/609576">609576</a>, <a href="/entry/607008">607008</a> and <a href="/entry/606885">606885</a>, respectively) and 3-ketoacyl-CoA thiolase (<a href="/entry/607809">607809</a>) were normal. The clinical features of this disorder bore similarities to those of systemic carnitine deficiency (<a href="/entry/212140">212140</a>) as well as with carnitine-palmitoyl-CoA transferase (<a href="/entry/255110">255110</a> and <a href="/entry/255120">255120</a>) and long-chain acyl-CoA dehydrogenase deficiencies. The differential diagnosis relies on the demonstration of long-chain urinary dicarboxylic acids with a hydroxyl group in the 3-position and on the study of the enzyme activity in cultured fibroblasts. <a href="#18" class="mim-tip-reference" title="Rocchiccioli, F., Wanders, R. J. A., Aubourg, P., Vianey-Liaud, C., Ijlst, L., Fabre, M., Cartier, N., Bougneres, P.-F. &lt;strong&gt;Deficiency of long-chain 3-hydroxyacyl-CoA dehydrogenase: a cause of lethal myopathy and cardiomyopathy in early childhood.&lt;/strong&gt; Pediat. Res. 28: 657-662, 1990.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/2284166/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;2284166&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1203/00006450-199012000-00023&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="2284166">Rocchiccioli et al. (1990)</a> diagrammed the pathway of fatty acyl-CoA beta-oxidation in mitochondria. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=2284166" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#15" class="mim-tip-reference" title="Jackson, S., Bartlett, K., Land, J., Moxon, E. R., Pollitt, R. J., Leonard, J. V., Turnbull, D. M. &lt;strong&gt;Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency.&lt;/strong&gt; Pediat. Res. 29: 406-411, 1991.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/1830138/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;1830138&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1203/00006450-199104000-00016&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="1830138">Jackson et al. (1991)</a> described the cases of 2 unrelated children. Recessive inheritance was supported by the finding of intermediate levels of enzyme activity in the fibroblasts from the parents of one of the children. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1830138" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#2" class="mim-tip-reference" title="Bertini, E., Dionisi-Vici, C., Garavaglia, B., Burlina, A. B., Sabatelli, M., Rimoldi, M., Bartuli, A., Sabetta, G., DiDonato, S. &lt;strong&gt;Peripheral sensory-motor polyneuropathy, pigmentary retinopathy, and fatal cardiomyopathy in long-chain 3-hydroxy-acyl-CoA dehydrogenase deficiency.&lt;/strong&gt; Europ. J. Pediat. 151: 121-126, 1992.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/1537353/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;1537353&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/BF01958956&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="1537353">Bertini et al. (1992)</a> reported the case of an 11-month-old girl with LCHAD deficiency and a new phenotype of sensorimotor polyneuropathy, pigmentary retinopathy, and fatal progressive cardiomyopathy. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1537353" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#9" class="mim-tip-reference" title="Hagenfeldt, L., von Dobeln, U., Holme, E., Alm, J., Brandberg, G., Enocksson, E., Lindeberg, L. &lt;strong&gt;3-Hydroxydicarboxylic aciduria--a fatty acid oxidation defect with severe prognosis.&lt;/strong&gt; J. Pediat. 116: 387-392, 1990.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/2308028/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;2308028&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0022-3476(05)82826-4&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="2308028">Hagenfeldt et al. (1990)</a> described 5 patients with a suspected defect in the beta-oxidation of fatty acids characterized by massive excretion of 3-hydroxydicarboxylic acids in the urine and accumulation of 3-hydroxy fatty acids in serum during acute illness. Long-chain and medium-chain acyl-coenzyme A dehydrogenases in fibroblasts were normal in all patients. Death due to cardiomyopathy and liver failure occurred in 4 of the 5 at 3 to 14 months of age. Elder sibs of 2 of the patients had died unexpectedly in early infancy. The parents of 1 of the patients were second cousins. Long-chain 3-hydroxyacyl-CoA dehydrogenase may have been the enzyme deficient in these cases. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=2308028" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#25" class="mim-tip-reference" title="Tyni, T., Palotie, A., Viinikka, L., Valanne, L., Salo, M. K., von Dobeln, U., Jackson, S., Wanders, R., Venizelos, N., Pihko, H. &lt;strong&gt;Long-chain 3-hydroxyacyl-coenzyme A dehydrogenase deficiency with the G1528C mutation: clinical presentation of thirteen patients.&lt;/strong&gt; J. Pediat. 130: 67-76, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9003853/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9003853&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0022-3476(97)70312-3&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9003853">Tyni et al. (1997)</a> discussed the clinical presentation of 13 patients with LCHAD deficiency. The patients had hypoglycemia, cardiomyopathy, muscle hypotonia, and hepatomegaly during the first 2 years of life. Recurrent metabolic crises had occurred in 7 patients; the other 6 had a steadily progressive course. Cholestatic liver disease, which is uncommon in beta-oxidation defects, was found in 2 patients. One patient had peripheral neuropathy, and 6 had retinopathy with focal pigmentary aggregations or retinal hypopigmentation. Radiologically, there was bilateral periventricular or focal cortical lesions in 3 patients and brain atrophy in 1. Only 1 patient, who had dietary treatment for 9 years, was alive at the age of 14 years; all others died before they were 2 years of age. The experience indicated the importance of recognizing the clinical features of LCHAD deficiency for the early institution of dietary management, which can alter the otherwise invariably poor prognosis. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9003853" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#11" class="mim-tip-reference" title="Ibdah, J. A., Dasouki, M. J., Strauss, A. W. &lt;strong&gt;Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: variable expressivity of maternal illness during pregnancy and unusual presentation with infantile cholestasis and hypocalcaemia.&lt;/strong&gt; J. Inherit. Metab. Dis. 22: 811-814, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10518281/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10518281&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1023/a:1005506024055&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10518281">Ibdah et al. (1999)</a> reported a patient who presented at 2 months of age with generalized tonic-clonic seizure due to an acute infantile hypocalcemia and vitamin D deficiency. He also had occult, unexplained cholestatic liver disease and impairment of 25-hydroxylation of vitamin D secondary to hepatic steatosis. Sudden unexpected death occurred at 8 months. Molecular analysis identified a homozygous 1528G-C mutation (E510Q; <a href="/entry/600890#0001">600890.0001</a>) in the HADHA gene. The mother had preeclampsia during the third trimester of her pregnancy. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10518281" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In 2 girls, aged 8 and 15 years, with LCHAD deficiency, <a href="#19" class="mim-tip-reference" title="Schrijver-Wieling, I., van Rens, G. H. M. B., Wittebol-Post, D., Smeitink, J. A. M., de Jager, J. P., de Klerk, H. B. C., van Lith, G. H. M. &lt;strong&gt;Retinal dystrophy in long chain 3-hydroxy-acyl-CoA dehydrogenase deficiency.&lt;/strong&gt; Brit. J. Ophthal. 81: 291-294, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9215057/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9215057&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1136/bjo.81.4.291&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9215057">Schrijver-Wieling et al. (1997)</a> observed extensive macular pigmentary depositions and a 'salt and pepper' scattering of pigment in their retinas. They had decreasing visual acuity. The investigators suggested that testing for LCHAD deficiency should be included in the diagnostic process in children with retinal dystrophy, in particular when other clinical symptoms suggesting this disorder occur. <a href="#26" class="mim-tip-reference" title="Uusimaa, J., Vainionpaa, L., Simila, S., Miettinen, R., Nuutinen, M. &lt;strong&gt;L-3-hydroxyacyl-CoA dehydrogenase deficiency: two cases with pigmentary retinopathy.&lt;/strong&gt; J. Inherit. Metab. Dis. 20: 848-850, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9427163/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9427163&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1023/a:1005356826192&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9427163">Uusimaa et al. (1997)</a> reported 2 unrelated boys with pigmentary retinopathy in association with a mild clinical presentation of LCHAD deficiency. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=9215057+9427163" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#24" class="mim-tip-reference" title="Tyni, T., Johnson, M., Eaton, S., Pourfarzam, M., Andrews, R., Turnbull, D. M. &lt;strong&gt;Mitochondrial fatty acid beta-oxidation in the retinal pigment epithelium.&lt;/strong&gt; Pediat. Res. 52: 595-600, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12357056/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;12357056&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1203/00006450-200210000-00021&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="12357056">Tyni et al. (2002)</a> noted that pigmentary retinopathy is an important feature of LCHAD deficiency. In studies in cultured porcine retinal pigment epithelium (RPE) cells, they presented strong in vitro evidence for the presence of mitochondrial fatty acid beta-oxidation in RPE cells and the expression of the MTP in the RPE and other layers of the retina. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12357056" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#20" class="mim-tip-reference" title="Sewell, A. C., Bender, S. W., Wirth, S., Munterfering, H., Ijlist, L., Wanders, R. J. A. &lt;strong&gt;Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: a severe fatty acid oxidation disorder.&lt;/strong&gt; Europ. J. Pediat. 153: 745-750, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7813533/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7813533&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/BF01954492&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7813533">Sewell et al. (1994)</a> stated that most reported cases were diagnosed at the age of several months and presented with fasting-induced hypoketotic hypoglycemia and muscular hypotonia. <a href="#22" class="mim-tip-reference" title="Thiel, C., Baudach, S., Schnackenberg, U., Vreken, P., Wanders, R. J. A. &lt;strong&gt;Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: neonatal manifestation at the first day of life presenting with tachypnoea.&lt;/strong&gt; J. Inherit. Metab. Dis. 22: 839-840, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10518285/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10518285&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1023/a:1005514325872&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10518285">Thiel et al. (1999)</a> reported a patient presenting 20 hours after birth with signs of tachypnea, hypotonia, and mild retractions, and <a href="#3" class="mim-tip-reference" title="Carpenter, K. H., Wilcken, B. &lt;strong&gt;Neonatal diagnosis of long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency and implications for newborn screening by tandem mass spectrometry.&lt;/strong&gt; J. Inherit. Metab. Dis. 22: 840-841, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10518286/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10518286&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1023/a:1005566309942&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10518286">Carpenter and Wilcken (1999)</a> described a patient who developed hypoglycemia at birth; on dietary treatment, both patients remained well. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=10518285+10518286+7813533" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>Although the mortality rate among children with deficiency of LCHAD or complete deficiency of the trifunctional protein had been reported to be 75 to 90%, <a href="#10" class="mim-tip-reference" title="Ibdah, J. A., Bennett, M. J., Rinaldo, P., Zhao, Y., Gibson, B., Sims, H. F., Strauss, A. W. &lt;strong&gt;A fetal fatty-acid oxidation disorder as a cause of liver disease in pregnant women.&lt;/strong&gt; New Eng. J. Med. 340: 1723-1731, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10352164/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10352164&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1056/NEJM199906033402204&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10352164">Ibdah et al. (1999)</a> found that 67% of the affected children in their study were alive and receiving dietary treatment at the most recent follow-up, and most were able to attend school. Dietary treatment of children with fatty-acid oxidation disorders dramatically reduces morbidity and mortality. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10352164" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#27" class="mim-tip-reference" title="Van Hove, J. L. K., Kahler, S. G., Feezor, M. D., Ramakrishna, J. P., Hart, P., Treem, W. R., Shen, J.-J., Matern, D., Millington, D. S. &lt;strong&gt;Acylcarnitines in plasma and blood spots of patients with long-chain 3-hydroxyacyl-coenzyme A dehydrogenase defiency (sic).&lt;/strong&gt; J. Inherit. Metab. Dis. 23: 571-582, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11032332/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11032332&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1023/a:1005673828469&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11032332">Van Hove et al. (2000)</a> reviewed the acylcarnitines in plasma and blood spots of patients with LCHAD deficiency. Long-chain 3-hydroxyacylcarnitines of C14:1, C14, C16, and C18:1 chain length, and long-chain acylcarnitines of C12, C14:1, C14, C16, C18:2, and C18:1 chain length were elevated. Acetylcarnitine was decreased. In plasma, elevation of hydroxy-C18:1 acylcarnitine over the 95th centile of controls, in combination with an elevation of 2 of the 3 acylcarnitines C14, C14:1, and hydroxy-C16, identified over 85% of patients with high specificity (less the 0.1% false-positive rate). High endogenous levels of long-chain acylcarnitines in normal erythrocytes reduced the diagnostic specificity in blood spots compared with plasma samples. The results were diagnostic in the asymptomatic patients. Treatment with a diet low in fat and high in medium-chain triglyceride decreased all disease-specific acylcarnitines, often to normal, suggesting that this assay is useful in treatment monitoring. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11032332" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#4" class="mim-tip-reference" title="den Boer, M. E. J., Wanders, R. J. A., Morris, A. A. M., IJlst, L., Heymans, H. S. A., Wijburg, F. A. &lt;strong&gt;Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: clinical presentation and follow-up of 50 patients.&lt;/strong&gt; Pediatrics 109: 99-104, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11773547/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11773547&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1542/peds.109.1.99&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11773547">Den Boer et al. (2002)</a> reviewed the clinical presentation and follow-up of 50 patients with LCHAD deficiency. The mean age at presentation was 5.8 months (range, 1 day to 26 months). Seven (15%) of the patients presented in the neonatal period (0-4 weeks of age). Thirty-nine patients (78%) presented with acute hypoketotic hypoglycemia. The other 11 patients (22%) presented with a more chronic disorder consisting of cholestatic liver disease, failure to thrive, feeding difficulties, and/or hypotonia. Further analysis of the clinical history of the patients presenting with acute hypoglycemia revealed that 32 (82%) of the 39 patients had a combination of nonspecific symptoms likely related to LCHAD deficiency including cardiomyopathy, feeding difficulties, hepatomegaly, and hypotonia. Mortality in the series was high (38%), with patients all dying before or within 3 months after diagnosis. Despite dietary treatment consisting of avoidance of fasting and a carbohydrate-rich, fat-restricted diet, morbidity in the surviving patients was high, with recurrent metabolic crises occurring in 8 of 31 survivors (26%) and recurrent muscle pains with elevated creatine kinase (CK) levels in 10 of 31 survivors (32%). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11773547" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#7" class="mim-tip-reference" title="Fryburg, J. S., Pelegano, J. P., Bennett, M. J., Bebin, E. M. &lt;strong&gt;Long-chain 3-hydroxyacyl-coenzyme A dehydrogenase (L-CHAD) deficiency in a patient with the Bannayan-Riley-Ruvalcaba syndrome.&lt;/strong&gt; Am. J. Med. Genet. 52: 97-102, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7977472/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7977472&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/ajmg.1320520119&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7977472">Fryburg et al. (1994)</a> suggested that LCHAD deficiency is responsible for the lipid myopathy in Bannayan-Riley-Ruvalcaba syndrome (see <a href="/entry/158350">158350</a>), an autosomal dominant condition of macrocephaly in combination with lipomas/hemangiomas and developmental delay. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7977472" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Acute Fatty Liver Pregnancy (AFLP) and Hypertension, Elevated Liver Enzymes, and Low Platelet (HELLP) Syndromes</em></strong></p><p>
<a href="#30" class="mim-tip-reference" title="Wilcken, B., Leung, K.-C., Hammond, J., Kamath, R., Leonard, J. V. &lt;strong&gt;Pregnancy and fetal long-chain 3-hydroxyacyl coenzyme A dehydrogenase deficiency.&lt;/strong&gt; Lancet 341: 407-408, 1993.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8094173/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8094173&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/0140-6736(93)92993-4&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8094173">Wilcken et al. (1993)</a> and <a href="#23" class="mim-tip-reference" title="Treem, W. R., Rinaldo, P., Hale, D. E., Stanley, C. A., Millington, D. S., Hyams, J. S., Jackson, S., Turnbull, D. M. &lt;strong&gt;Acute fatty liver of pregnancy and long-chain hydroxyacyl-coenzyme A dehydrogenase deficiency.&lt;/strong&gt; Hepatology 19: 339-345, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8294091/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8294091&lt;/a&gt;]" pmid="8294091">Treem et al. (1994)</a> noted that isolated LCHAD deficiency in children may be associated with severe maternal illness occurring during pregnancies with affected fetuses. These maternal illnesses include the acute fatty liver pregnancy (AFLP) syndrome; hypertension or hemolysis, elevated liver enzymes, and low platelets (HELLP) syndrome; and hyperemesis gravidarum. The AFLP syndrome is characterized by anorexia, nausea, vomiting, abdominal pain, and jaundice in the third trimester. Fulminant liver failure and death may occur. HELLP syndrome is more common and may represent the severe end of the spectrum of preeclampsia. In both syndromes, microvesicular fatty infiltration of maternal liver occurs, a pathologic picture similar to that in children with fatty acid oxidation defects. Thus, AFLP and HELLP are genetic disorders due to a primary defect in the fetus. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=8094173+8294091" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#10" class="mim-tip-reference" title="Ibdah, J. A., Bennett, M. J., Rinaldo, P., Zhao, Y., Gibson, B., Sims, H. F., Strauss, A. W. &lt;strong&gt;A fetal fatty-acid oxidation disorder as a cause of liver disease in pregnant women.&lt;/strong&gt; New Eng. J. Med. 340: 1723-1731, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10352164/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10352164&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1056/NEJM199906033402204&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10352164">Ibdah et al. (1999)</a> stated that little is known about the mechanism of the association between isolated deficiency of LCHAD in a fetus with the common 1528G-C mutation (<a href="/entry/600890#0001">600890.0001</a>) on at least one allele and liver disease in the mother during the pregnancy. They hypothesized that in the presence of the 1528G-C mutation, long-chain 3-hydroxyacyl metabolites produced by the fetus or placenta accumulate in the mother and are highly toxic to the liver; this reaction is perhaps exaggerated by the decreased metabolic utilization of fatty acids during pregnancy. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10352164" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#12" class="mim-tip-reference" title="Ibdah, J. A., Zhao, Y., Viola, J., Gibson, B., Bennett, M. J., Strauss, A. W. &lt;strong&gt;Molecular prenatal diagnosis in families with fetal mitochondrial trifunctional protein mutations.&lt;/strong&gt; J. Pediat. 138: 396-399, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11241049/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11241049&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1067/mpd.2001.111503&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11241049">Ibdah et al. (2001)</a> performed molecular prenatal diagnosis in 9 pregnancies, 8 in 6 families with isolated LCHAD deficiency and 1 in a family with complete trifunctional protein deficiency. Analyses were performed on chorionic villus samples in 7 pregnancies and on amniocytes in 2. Molecular prenatal diagnosis successfully identified the fetal genotype in all 9 pregnancies. Two fetuses were affected, and the pregnancies were terminated. Two other fetuses had normal genotype and 5 others were heterozygotes. All 7 pregnancies were uncomplicated and all the offspring were liveborn and healthy. <a href="#12" class="mim-tip-reference" title="Ibdah, J. A., Zhao, Y., Viola, J., Gibson, B., Bennett, M. J., Strauss, A. W. &lt;strong&gt;Molecular prenatal diagnosis in families with fetal mitochondrial trifunctional protein mutations.&lt;/strong&gt; J. Pediat. 138: 396-399, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11241049/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11241049&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1067/mpd.2001.111503&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11241049">Ibdah et al. (2001)</a> concluded that women heterozygous for trifunctional protein alpha-subunit mutations who carry fetuses with wildtype or heterozygous genotypes have uncomplicated pregnancies. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11241049" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p><a href="#6" class="mim-tip-reference" title="Elizondo, G., Matern, D., Vockley, J., Harding, C. O., Gillingham, M. B. &lt;strong&gt;Effects of fasting, feeding and exercise on plasma acylcarnitines among subjects with CPT2D, VLCADD and LCHADD/TFPD.&lt;/strong&gt; Molec. Genet. Metab. 131: 90-97, 2020.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/32928639/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;32928639&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=32928639[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ymgme.2020.09.001&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="32928639">Elizondo et al. (2020)</a> studied plasma acylcarnitine levels in 11 patients with LCHAD deficiency after an overnight fast, after a meal, and after exercise. After an overnight fast, the highest long chain acylcarnitine species level was 18:1-OH. After a meal, the 18:1-OH level decreased by 59% and after exercise the 18:1 did not appreciably change. <a href="#6" class="mim-tip-reference" title="Elizondo, G., Matern, D., Vockley, J., Harding, C. O., Gillingham, M. B. &lt;strong&gt;Effects of fasting, feeding and exercise on plasma acylcarnitines among subjects with CPT2D, VLCADD and LCHADD/TFPD.&lt;/strong&gt; Molec. Genet. Metab. 131: 90-97, 2020.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/32928639/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;32928639&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=32928639[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ymgme.2020.09.001&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="32928639">Elizondo et al. (2020)</a> next correlated the sum of long chain acylcarnitines with free fatty acids after an overnight fast, after a meal, and after exercise to determine the contribution of lipolysis to long chain acylcarnitines in the 11 patients with LCHAD deficiency, 11 patients with CPT2 deficiency (<a href="/entry/255110">255110</a>), and 8 patients with VLCAD deficiency (<a href="/entry/201475">201475</a>). The free fatty acids correlated to total long chain acylcarnitines after overnight fasting but not after exercise, indicating that lipolysis is a significant contributor to acylcarnitine levels with fasting but not exercise. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=32928639" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p><a href="#17" class="mim-tip-reference" title="Jones, P. M., Butt, Y., Bennett, M. J. &lt;strong&gt;Accumulation of 3-hydroxy-fatty acids in the culture medium of long-chain L-3-hydroxyacyl CoA dehydrogenase (LCHAD) and mitochondrial trifunctional protein-deficient skin fibroblasts: implications for medium chain triglyceride dietary treatment of LCHAD deficiency.&lt;/strong&gt; Pediat. Res. 53: 783-787, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12621125/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;12621125&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1203/01.PDR.0000059748.67987.1F&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="12621125">Jones et al. (2003)</a> analyzed the effects of dietary treatment of LCHAD deficiency in an in vitro model of cultured skin fibroblasts from 2 patients with LCHAD deficiency, 1 with MPT deficiency, and controls. The results suggested that a medium-chain triglyceride preparation reduces the accumulation of potentially toxic long-chain 3-hydroxy-fatty acids in LCHAD deficiency and that a preparation with a higher ratio of decanoate to octanoate may be most effective. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12621125" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#8" class="mim-tip-reference" title="Guffon, N., Mochel, F., Schiff, M., De Lonlay, P., Douillard, C., Vianey-Saban, C. &lt;strong&gt;Clinical outcomes in a series of 18 patients with long chain fatty acids oxidation disorders treated with triheptanoin for a median duration of 22 months.&lt;/strong&gt; Molec. Genet. Metab. 132: 227-233, 2021.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/33610471/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;33610471&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ymgme.2021.02.003&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="33610471">Guffon et al. (2021)</a> described clinical response to treatment with triheptanoin in 18 patients with disorders of long chain fatty acid oxidation, including 5 with VLCAD deficiency (<a href="/entry/201475">201475</a>), 5 with LCHAD deficiency, 3 with CACT deficiency (<a href="/entry/212138">212138</a>), 3 with CPT II deficiency (<a href="/entry/600649">600649</a>), and 2 with MTP deficiency (<a href="/entry/609015">609015</a>). Treatment duration was for an average of 22 months, with a range of 9 to 228 months. Ten of 12 pediatric patients and 4 of 6 adult patients reported reduction in fatigue and weakness. Eight of 12 pediatric patients and 3 of 6 adult patients experienced reduced intensity of myalgia. Episodes of rhabdomyolysis decreased in 8 of 12 pediatric patients and 3 of 6 adult patients. Of 3 patients who had severe hypoglycemic events in the year prior to starting triheptanoin, none had these events in the year following initiation of therapy. On average, emergency hospital care visits and days of emergency home care were also reduced. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=33610471" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p>To identify the molecular basis of the deficiency in 26 Dutch patients with a deficiency in long-chain 3-hydroxyacyl-CoA dehydrogenase, <a href="#14" class="mim-tip-reference" title="IJlst, L., Wanders, R. J. A., Ushikubo, S., Kamijo, T., Hashimoto, T. &lt;strong&gt;Molecular basis of long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: identification of the major disease-causing mutation in the alpha-subunit of the mitochondrial trifunctional protein.&lt;/strong&gt; Biochim. Biophys. Acta 1215: 347-350, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7811722/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7811722&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/0005-2760(94)90064-7&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7811722">IJlst et al. (1994)</a> sequenced the cDNAs encoding the alpha and beta subunits of the trifunctional enzyme and identified a 1528G-C transversion in the dehydrogenase-encoding region of the alpha subunit. The single base change resulted in an glu510-to-gln (E510Q; <a href="/entry/600890#0001">600890.0001</a>) amino acid substitution, based on numbering from the start codon. The base substitution created a PstI restriction site. Using RFLP methods, they found that in 24 of 26 unrelated patients, only the 1528C was expressed. The other 2 patients were compound heterozygotes with 1 allele carrying this mutation. <a href="#13" class="mim-tip-reference" title="IJlst, L., Ruiter, J. P. N., Hoovers, J. M. N., Jakobs, M. E., Wanders, R. J. A. &lt;strong&gt;Common missense mutation G1528C in long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: characterization and expression of the mutant protein, mutation analysis on genomic DNA and chromosomal localization of the mitochondrial trifunctional protein alpha subunit gene.&lt;/strong&gt; J. Clin. Invest. 98: 1028-1033, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8770876/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8770876&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1172/JCI118863&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8770876">IJlst et al. (1996)</a> used S. cerevisiae for expression of wildtype and mutant protein to show that the 1528G-C mutation is directly responsible for the loss of LCHAD activity. Furthermore, they described a newly developed method allowing identification of the 1528G-C mutation in genomic DNA. The finding of an 87% allele frequency of this mutation in 34 LCHAD-deficient patients made this a valuable test for prenatal diagnosis. <a href="#13" class="mim-tip-reference" title="IJlst, L., Ruiter, J. P. N., Hoovers, J. M. N., Jakobs, M. E., Wanders, R. J. A. &lt;strong&gt;Common missense mutation G1528C in long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: characterization and expression of the mutant protein, mutation analysis on genomic DNA and chromosomal localization of the mitochondrial trifunctional protein alpha subunit gene.&lt;/strong&gt; J. Clin. Invest. 98: 1028-1033, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8770876/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8770876&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1172/JCI118863&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8770876">IJlst et al. (1996)</a> showed that the E510Q mutation is directly responsible for the loss of dehydrogenase activity without changing the structure of the enzyme complex. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=8770876+7811722" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#21" class="mim-tip-reference" title="Sims, H. F., Brackett, J. C., Powell, C. K., Treem, W. R., Hale, D. E., Bennett, M. J., Gibson, B., Shapiro, S., Strauss, A. W. &lt;strong&gt;The molecular basis of pediatric long chain 3-hydroxyacyl-CoA dehydrogenase deficiency associated with maternal acute fatty liver of pregnancy.&lt;/strong&gt; Proc. Nat. Acad. Sci. 92: 841-845, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7846063/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7846063&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1073/pnas.92.3.841&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7846063">Sims et al. (1995)</a> used single-strand conformation variance (SSCV) analysis of the exons encoding the alpha subunit of trifunctional protein to elucidate the molecular defects (see, e.g., <a href="/entry/600890#0001">600890.0001</a>-<a href="/entry/600890#0002">600890.0002</a>) in 3 families with children with isolated LCHAD deficiency and mothers with either AFLP syndrome or HELLP syndrome. Based on numbering of the mature peptide, <a href="#21" class="mim-tip-reference" title="Sims, H. F., Brackett, J. C., Powell, C. K., Treem, W. R., Hale, D. E., Bennett, M. J., Gibson, B., Shapiro, S., Strauss, A. W. &lt;strong&gt;The molecular basis of pediatric long chain 3-hydroxyacyl-CoA dehydrogenase deficiency associated with maternal acute fatty liver of pregnancy.&lt;/strong&gt; Proc. Nat. Acad. Sci. 92: 841-845, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7846063/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7846063&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1073/pnas.92.3.841&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7846063">Sims et al. (1995)</a> designated the 1528G-C mutation as glu474-to-gln (E474Q). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7846063" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="inheritance" class="mim-anchor"></a>
<h4 href="#mimInheritanceFold" id="mimInheritanceToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
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<strong>Inheritance</strong>
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<p>LCHAD deficiency usually shows autosomal recessive inheritance. <a href="#1" class="mim-tip-reference" title="Baskin, B., Geraghty, M., Ray, P. N. &lt;strong&gt;Paternal isodisomy of chromosome 2 as a cause of long chain 3-hydroxyacyl-CoA dehydrogenase (LCHAD) deficiency.&lt;/strong&gt; Am. J. Med. Genet. 152A: 1808-1811, 2010.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/20583174/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;20583174&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/ajmg.a.33462&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="20583174">Baskin et al. (2010)</a> reported an unusual case of LCHAD deficiency due to paternal isodisomy of chromosome 2. The patient was a 22-month-old child identified by newborn screening. Molecular analysis showed homozygosity for the common 1528G-C mutation (E510Q; <a href="/entry/600890#0001">600890.0001</a>), but only the father was found to be heterozygous for the mutation; it was not present in the mother. Genotype analysis of chromosome 2 using STR markers demonstrated uniparental isodisomy. The patient did not have other phenotypic abnormalities, suggesting that chromosome 2 is not imprinted. The finding was important, as it reduced the recurrence risk of this disease for this couple. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=20583174" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="populationGenetics" class="mim-anchor"></a>
<h4 href="#mimPopulationGeneticsFold" id="mimPopulationGeneticsToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
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<strong>Population Genetics</strong>
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<p><a href="#10" class="mim-tip-reference" title="Ibdah, J. A., Bennett, M. J., Rinaldo, P., Zhao, Y., Gibson, B., Sims, H. F., Strauss, A. W. &lt;strong&gt;A fetal fatty-acid oxidation disorder as a cause of liver disease in pregnant women.&lt;/strong&gt; New Eng. J. Med. 340: 1723-1731, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10352164/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10352164&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1056/NEJM199906033402204&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10352164">Ibdah et al. (1999)</a> found 17 different mutations among the 24 children in their study. In the 19 children with isolated deficiency of LCHAD, 71% of alleles had the E510Q mutation, and none of the 10 alleles (all of which were abnormal) in the 5 children with trifunctional protein deficiency had this mutation. Among 351 normal subjects, they found that 2 were heterozygous for the E510Q mutation. If this group of subjects was representative of the general population, then isolated deficiency of LCHAD would occur once in every 62,000 pregnancies, and either trifunctional protein or long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency would occur once in 38,000 pregnancies. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10352164" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="seeAlso" class="mim-anchor"></a>
<h4 href="#mimSeeAlsoFold" id="mimSeeAlsoToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
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<strong>See Also:</strong>
</span>
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<span class="mim-text-font">
<a href="#Jackson1992" class="mim-tip-reference" title="Jackson, S., Kler, R. S., Bartlett, K., Briggs, H., Bindoff, L. A., Pourfarzam, M., Gardner-Medwin, D., Turnbull, D. M. &lt;strong&gt;Combined enzyme defect of mitochondrial fatty acid oxidation.&lt;/strong&gt; J. Clin. Invest. 90: 1219-1225, 1992.">Jackson et al. (1992)</a>; <a href="#Wanders1992" class="mim-tip-reference" title="Wanders, R. J. A., IJlst, L., Poggi, F., Bonnefont, J. P., Munnich, A., Brivet, M., Rabier, D., Saudubray, J. M. &lt;strong&gt;Human trifunctional protein deficiency: a new disorder of mitochondrial fatty acid beta-oxidation.&lt;/strong&gt; Biochem. Biophys. Res. Commun. 188: 1139-1145, 1992.">Wanders et al. (1992)</a>
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<a id="references"class="mim-anchor"></a>
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<span class="mim-font">
<span id="mimReferencesToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<strong>REFERENCES</strong>
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<a id="1" class="mim-anchor"></a>
<a id="Baskin2010" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Baskin, B., Geraghty, M., Ray, P. N.
<strong>Paternal isodisomy of chromosome 2 as a cause of long chain 3-hydroxyacyl-CoA dehydrogenase (LCHAD) deficiency.</strong>
Am. J. Med. Genet. 152A: 1808-1811, 2010.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/20583174/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">20583174</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=20583174" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1002/ajmg.a.33462" target="_blank">Full Text</a>]
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<a id="Bertini1992" class="mim-anchor"></a>
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Bertini, E., Dionisi-Vici, C., Garavaglia, B., Burlina, A. B., Sabatelli, M., Rimoldi, M., Bartuli, A., Sabetta, G., DiDonato, S.
<strong>Peripheral sensory-motor polyneuropathy, pigmentary retinopathy, and fatal cardiomyopathy in long-chain 3-hydroxy-acyl-CoA dehydrogenase deficiency.</strong>
Europ. J. Pediat. 151: 121-126, 1992.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/1537353/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">1537353</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1537353" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1007/BF01958956" target="_blank">Full Text</a>]
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<a id="Carpenter1999" class="mim-anchor"></a>
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<p class="mim-text-font">
Carpenter, K. H., Wilcken, B.
<strong>Neonatal diagnosis of long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency and implications for newborn screening by tandem mass spectrometry.</strong>
J. Inherit. Metab. Dis. 22: 840-841, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10518286/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10518286</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10518286" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1023/a:1005566309942" target="_blank">Full Text</a>]
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<a id="den Boer2002" class="mim-anchor"></a>
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<p class="mim-text-font">
den Boer, M. E. J., Wanders, R. J. A., Morris, A. A. M., IJlst, L., Heymans, H. S. A., Wijburg, F. A.
<strong>Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: clinical presentation and follow-up of 50 patients.</strong>
Pediatrics 109: 99-104, 2002.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11773547/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11773547</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11773547" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1542/peds.109.1.99" target="_blank">Full Text</a>]
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<a id="5" class="mim-anchor"></a>
<a id="Duran1991" class="mim-anchor"></a>
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<p class="mim-text-font">
Duran, M., Wanders, R. J. A., de Jager, J. P., Dorland, L., Bruinvis, L., Ketting, D., Ijlst, L., van Sprang, F. J.
<strong>3-Hydroxydicarboxylic aciduria due to long-chain 3-hydroxyacyl-coenzyme A dehydrogenase deficiency associated with sudden neonatal death: protective effect of medium-chain triglyceride treatment.</strong>
Europ. J. Pediat. 150: 190-195, 1991.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/2044590/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">2044590</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=2044590" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1007/BF01963564" target="_blank">Full Text</a>]
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<a id="6" class="mim-anchor"></a>
<a id="Elizondo2020" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Elizondo, G., Matern, D., Vockley, J., Harding, C. O., Gillingham, M. B.
<strong>Effects of fasting, feeding and exercise on plasma acylcarnitines among subjects with CPT2D, VLCADD and LCHADD/TFPD.</strong>
Molec. Genet. Metab. 131: 90-97, 2020.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/32928639/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">32928639</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=32928639[PMID]&report=imagesdocsum" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Image', 'domain': 'ncbi.nlm.nih.gov'})">images</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=32928639" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/j.ymgme.2020.09.001" target="_blank">Full Text</a>]
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<a id="Fryburg1994" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Fryburg, J. S., Pelegano, J. P., Bennett, M. J., Bebin, E. M.
<strong>Long-chain 3-hydroxyacyl-coenzyme A dehydrogenase (L-CHAD) deficiency in a patient with the Bannayan-Riley-Ruvalcaba syndrome.</strong>
Am. J. Med. Genet. 52: 97-102, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7977472/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7977472</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7977472" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1002/ajmg.1320520119" target="_blank">Full Text</a>]
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<a id="8" class="mim-anchor"></a>
<a id="Guffon2021" class="mim-anchor"></a>
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<p class="mim-text-font">
Guffon, N., Mochel, F., Schiff, M., De Lonlay, P., Douillard, C., Vianey-Saban, C.
<strong>Clinical outcomes in a series of 18 patients with long chain fatty acids oxidation disorders treated with triheptanoin for a median duration of 22 months.</strong>
Molec. Genet. Metab. 132: 227-233, 2021.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/33610471/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">33610471</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=33610471" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/j.ymgme.2021.02.003" target="_blank">Full Text</a>]
</p>
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<a id="9" class="mim-anchor"></a>
<a id="Hagenfeldt1990" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Hagenfeldt, L., von Dobeln, U., Holme, E., Alm, J., Brandberg, G., Enocksson, E., Lindeberg, L.
<strong>3-Hydroxydicarboxylic aciduria--a fatty acid oxidation defect with severe prognosis.</strong>
J. Pediat. 116: 387-392, 1990.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/2308028/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">2308028</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=2308028" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/s0022-3476(05)82826-4" target="_blank">Full Text</a>]
</p>
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<li>
<a id="10" class="mim-anchor"></a>
<a id="Ibdah1999" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Ibdah, J. A., Bennett, M. J., Rinaldo, P., Zhao, Y., Gibson, B., Sims, H. F., Strauss, A. W.
<strong>A fetal fatty-acid oxidation disorder as a cause of liver disease in pregnant women.</strong>
New Eng. J. Med. 340: 1723-1731, 1999.
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[<a href="https://doi.org/10.1056/NEJM199906033402204" target="_blank">Full Text</a>]
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<a id="11" class="mim-anchor"></a>
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Ibdah, J. A., Dasouki, M. J., Strauss, A. W.
<strong>Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: variable expressivity of maternal illness during pregnancy and unusual presentation with infantile cholestasis and hypocalcaemia.</strong>
J. Inherit. Metab. Dis. 22: 811-814, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10518281/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10518281</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10518281" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1023/a:1005506024055" target="_blank">Full Text</a>]
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Ibdah, J. A., Zhao, Y., Viola, J., Gibson, B., Bennett, M. J., Strauss, A. W.
<strong>Molecular prenatal diagnosis in families with fetal mitochondrial trifunctional protein mutations.</strong>
J. Pediat. 138: 396-399, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11241049/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11241049</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11241049" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1067/mpd.2001.111503" target="_blank">Full Text</a>]
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<div class="">
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IJlst, L., Ruiter, J. P. N., Hoovers, J. M. N., Jakobs, M. E., Wanders, R. J. A.
<strong>Common missense mutation G1528C in long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: characterization and expression of the mutant protein, mutation analysis on genomic DNA and chromosomal localization of the mitochondrial trifunctional protein alpha subunit gene.</strong>
J. Clin. Invest. 98: 1028-1033, 1996.
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[<a href="https://doi.org/10.1172/JCI118863" target="_blank">Full Text</a>]
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IJlst, L., Wanders, R. J. A., Ushikubo, S., Kamijo, T., Hashimoto, T.
<strong>Molecular basis of long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: identification of the major disease-causing mutation in the alpha-subunit of the mitochondrial trifunctional protein.</strong>
Biochim. Biophys. Acta 1215: 347-350, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7811722/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7811722</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7811722" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/0005-2760(94)90064-7" target="_blank">Full Text</a>]
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Jackson, S., Bartlett, K., Land, J., Moxon, E. R., Pollitt, R. J., Leonard, J. V., Turnbull, D. M.
<strong>Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency.</strong>
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[<a href="https://doi.org/10.1203/00006450-199104000-00016" target="_blank">Full Text</a>]
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Jackson, S., Kler, R. S., Bartlett, K., Briggs, H., Bindoff, L. A., Pourfarzam, M., Gardner-Medwin, D., Turnbull, D. M.
<strong>Combined enzyme defect of mitochondrial fatty acid oxidation.</strong>
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[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/1401059/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">1401059</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1401059" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1172/JCI115983" target="_blank">Full Text</a>]
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Jones, P. M., Butt, Y., Bennett, M. J.
<strong>Accumulation of 3-hydroxy-fatty acids in the culture medium of long-chain L-3-hydroxyacyl CoA dehydrogenase (LCHAD) and mitochondrial trifunctional protein-deficient skin fibroblasts: implications for medium chain triglyceride dietary treatment of LCHAD deficiency.</strong>
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[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12621125/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12621125</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12621125" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1203/01.PDR.0000059748.67987.1F" target="_blank">Full Text</a>]
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<p class="mim-text-font">
Rocchiccioli, F., Wanders, R. J. A., Aubourg, P., Vianey-Liaud, C., Ijlst, L., Fabre, M., Cartier, N., Bougneres, P.-F.
<strong>Deficiency of long-chain 3-hydroxyacyl-CoA dehydrogenase: a cause of lethal myopathy and cardiomyopathy in early childhood.</strong>
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[<a href="https://doi.org/10.1203/00006450-199012000-00023" target="_blank">Full Text</a>]
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<p class="mim-text-font">
Schrijver-Wieling, I., van Rens, G. H. M. B., Wittebol-Post, D., Smeitink, J. A. M., de Jager, J. P., de Klerk, H. B. C., van Lith, G. H. M.
<strong>Retinal dystrophy in long chain 3-hydroxy-acyl-CoA dehydrogenase deficiency.</strong>
Brit. J. Ophthal. 81: 291-294, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9215057/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9215057</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9215057" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1136/bjo.81.4.291" target="_blank">Full Text</a>]
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<p class="mim-text-font">
Sewell, A. C., Bender, S. W., Wirth, S., Munterfering, H., Ijlist, L., Wanders, R. J. A.
<strong>Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: a severe fatty acid oxidation disorder.</strong>
Europ. J. Pediat. 153: 745-750, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7813533/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7813533</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7813533" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1007/BF01954492" target="_blank">Full Text</a>]
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<p class="mim-text-font">
Sims, H. F., Brackett, J. C., Powell, C. K., Treem, W. R., Hale, D. E., Bennett, M. J., Gibson, B., Shapiro, S., Strauss, A. W.
<strong>The molecular basis of pediatric long chain 3-hydroxyacyl-CoA dehydrogenase deficiency associated with maternal acute fatty liver of pregnancy.</strong>
Proc. Nat. Acad. Sci. 92: 841-845, 1995.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7846063/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7846063</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7846063" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1073/pnas.92.3.841" target="_blank">Full Text</a>]
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<p class="mim-text-font">
Thiel, C., Baudach, S., Schnackenberg, U., Vreken, P., Wanders, R. J. A.
<strong>Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: neonatal manifestation at the first day of life presenting with tachypnoea.</strong>
J. Inherit. Metab. Dis. 22: 839-840, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10518285/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10518285</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10518285" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1023/a:1005514325872" target="_blank">Full Text</a>]
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<div class="">
<p class="mim-text-font">
Treem, W. R., Rinaldo, P., Hale, D. E., Stanley, C. A., Millington, D. S., Hyams, J. S., Jackson, S., Turnbull, D. M.
<strong>Acute fatty liver of pregnancy and long-chain hydroxyacyl-coenzyme A dehydrogenase deficiency.</strong>
Hepatology 19: 339-345, 1994.
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</p>
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<p class="mim-text-font">
Tyni, T., Johnson, M., Eaton, S., Pourfarzam, M., Andrews, R., Turnbull, D. M.
<strong>Mitochondrial fatty acid beta-oxidation in the retinal pigment epithelium.</strong>
Pediat. Res. 52: 595-600, 2002.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12357056/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12357056</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12357056" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1203/00006450-200210000-00021" target="_blank">Full Text</a>]
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<div class="">
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Tyni, T., Palotie, A., Viinikka, L., Valanne, L., Salo, M. K., von Dobeln, U., Jackson, S., Wanders, R., Venizelos, N., Pihko, H.
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J. Pediat. 130: 67-76, 1997.
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[<a href="https://doi.org/10.1016/s0022-3476(97)70312-3" target="_blank">Full Text</a>]
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<p class="mim-text-font">
Uusimaa, J., Vainionpaa, L., Simila, S., Miettinen, R., Nuutinen, M.
<strong>L-3-hydroxyacyl-CoA dehydrogenase deficiency: two cases with pigmentary retinopathy.</strong>
J. Inherit. Metab. Dis. 20: 848-850, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9427163/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9427163</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9427163" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1023/a:1005356826192" target="_blank">Full Text</a>]
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<div class="">
<p class="mim-text-font">
Van Hove, J. L. K., Kahler, S. G., Feezor, M. D., Ramakrishna, J. P., Hart, P., Treem, W. R., Shen, J.-J., Matern, D., Millington, D. S.
<strong>Acylcarnitines in plasma and blood spots of patients with long-chain 3-hydroxyacyl-coenzyme A dehydrogenase defiency (sic).</strong>
J. Inherit. Metab. Dis. 23: 571-582, 2000.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11032332/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11032332</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11032332" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1023/a:1005673828469" target="_blank">Full Text</a>]
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<a id="Wanders1989" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Wanders, R. J. A., Duran, M., Ijlst, L., de Jager, J. P., van Gennip, A. H., Jakobs, C., Dorland, L., van Sprang, F. J.
<strong>Sudden infant death and long-chain 3-hydroxyacyl-CoA dehydrogenase. (Letter)</strong>
Lancet 334: 52-53, 1989. Note: Originally Volume II.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/2567831/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">2567831</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=2567831" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/s0140-6736(89)90300-0" target="_blank">Full Text</a>]
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<a id="Wanders1992" class="mim-anchor"></a>
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Wanders, R. J. A., IJlst, L., Poggi, F., Bonnefont, J. P., Munnich, A., Brivet, M., Rabier, D., Saudubray, J. M.
<strong>Human trifunctional protein deficiency: a new disorder of mitochondrial fatty acid beta-oxidation.</strong>
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[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/1445348/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">1445348</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1445348" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/0006-291x(92)91350-y" target="_blank">Full Text</a>]
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<a id="Wilcken1993" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Wilcken, B., Leung, K.-C., Hammond, J., Kamath, R., Leonard, J. V.
<strong>Pregnancy and fetal long-chain 3-hydroxyacyl coenzyme A dehydrogenase deficiency.</strong>
Lancet 341: 407-408, 1993.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8094173/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8094173</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8094173" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/0140-6736(93)92993-4" target="_blank">Full Text</a>]
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Hilary J. Vernon - updated : 06/14/2021<br>Kelly A. Przylepa - updated : 03/22/2021<br>Cassandra L. Kniffin - updated : 11/1/2010<br>Cassandra L. Kniffin - updated : 12/14/2007<br>Natalie E. Krasikov - updated : 8/2/2005
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Ada Hamosh : 11/8/2004
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alopez : 02/22/2024
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<h3>
<span class="mim-font">
<strong>#</strong> 609016
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<span class="mim-font">
LONG-CHAIN 3-HYDROXYACYL-CoA DEHYDROGENASE DEFICIENCY
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<span class="mim-font">
<em>Alternative titles; symbols</em>
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LCHAD DEFICIENCY
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<strong>SNOMEDCT:</strong> 726021008; &nbsp;
<strong>ORPHA:</strong> 5; &nbsp;
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<strong>Phenotype-Gene Relationships</strong>
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Location
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Phenotype
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Phenotype <br /> MIM number
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Inheritance
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Phenotype <br /> mapping key
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Gene/Locus
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Gene/Locus <br /> MIM number
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<span class="mim-font">
2p23.3
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LCHAD deficiency
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609016
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Autosomal recessive
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3
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HADHA
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600890
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2p23.3
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HELLP syndrome, maternal, of pregnancy
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609016
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Autosomal recessive
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3
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HADHA
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600890
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2p23.3
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Fatty liver, acute, of pregnancy
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609016
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Autosomal recessive
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3
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HADHA
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600890
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because LCHAD deficiency is caused by homozygous or compound heterozygous mutations in the gene encoding long-chain hydroxyacyl-CoA dehydrogenase (HADHA; 600890).</p><p>Complete mitochondrial trifunctional protein deficiency (609015) is a less common disorder that is also caused by mutation in the HADHA gene.</p>
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<strong>Description</strong>
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<p>Isolated deficiency of long-chain 3-hydroxyl-CoA dehydrogenase (LCHAD) is an autosomal recessive disorder characterized by early-onset cardiomyopathy, hypoglycemia, neuropathy, and pigmentary retinopathy, and sudden death (IJlst et al., 1996). </p>
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<strong>Clinical Features</strong>
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<p>Wanders et al. (1989) described sudden infant death syndrome (SIDS) in a 3-day-old infant caused by deficiency of long-chain 3-hydroxyacyl-CoA dehydrogenase. Duran et al. (1991) reported that the younger sister of this patient began at the age of 5 months to have feeding problems, lowered consciousness, and liver dysfunction. Plasma long-chain acylcarnitine was increased. A clue to the diagnosis was given by the results of a phenylpropionic acid loading test. On a diet enriched with medium-chain triglycerides, the patient started to thrive, signs of cardiomyopathy disappeared, and her liver function returned to normal. </p><p>Rocchiccioli et al. (1990) described an infant with LCHAD deficiency who developed recurrent hypoglycemia in early infancy and died at 9 months of age from a rapidly progressive myopathy and cardiomyopathy. The activities of long-, medium-, and short-chain acyl-CoA dehydrogenases (609576, 607008 and 606885, respectively) and 3-ketoacyl-CoA thiolase (607809) were normal. The clinical features of this disorder bore similarities to those of systemic carnitine deficiency (212140) as well as with carnitine-palmitoyl-CoA transferase (255110 and 255120) and long-chain acyl-CoA dehydrogenase deficiencies. The differential diagnosis relies on the demonstration of long-chain urinary dicarboxylic acids with a hydroxyl group in the 3-position and on the study of the enzyme activity in cultured fibroblasts. Rocchiccioli et al. (1990) diagrammed the pathway of fatty acyl-CoA beta-oxidation in mitochondria. </p><p>Jackson et al. (1991) described the cases of 2 unrelated children. Recessive inheritance was supported by the finding of intermediate levels of enzyme activity in the fibroblasts from the parents of one of the children. </p><p>Bertini et al. (1992) reported the case of an 11-month-old girl with LCHAD deficiency and a new phenotype of sensorimotor polyneuropathy, pigmentary retinopathy, and fatal progressive cardiomyopathy. </p><p>Hagenfeldt et al. (1990) described 5 patients with a suspected defect in the beta-oxidation of fatty acids characterized by massive excretion of 3-hydroxydicarboxylic acids in the urine and accumulation of 3-hydroxy fatty acids in serum during acute illness. Long-chain and medium-chain acyl-coenzyme A dehydrogenases in fibroblasts were normal in all patients. Death due to cardiomyopathy and liver failure occurred in 4 of the 5 at 3 to 14 months of age. Elder sibs of 2 of the patients had died unexpectedly in early infancy. The parents of 1 of the patients were second cousins. Long-chain 3-hydroxyacyl-CoA dehydrogenase may have been the enzyme deficient in these cases. </p><p>Tyni et al. (1997) discussed the clinical presentation of 13 patients with LCHAD deficiency. The patients had hypoglycemia, cardiomyopathy, muscle hypotonia, and hepatomegaly during the first 2 years of life. Recurrent metabolic crises had occurred in 7 patients; the other 6 had a steadily progressive course. Cholestatic liver disease, which is uncommon in beta-oxidation defects, was found in 2 patients. One patient had peripheral neuropathy, and 6 had retinopathy with focal pigmentary aggregations or retinal hypopigmentation. Radiologically, there was bilateral periventricular or focal cortical lesions in 3 patients and brain atrophy in 1. Only 1 patient, who had dietary treatment for 9 years, was alive at the age of 14 years; all others died before they were 2 years of age. The experience indicated the importance of recognizing the clinical features of LCHAD deficiency for the early institution of dietary management, which can alter the otherwise invariably poor prognosis. </p><p>Ibdah et al. (1999) reported a patient who presented at 2 months of age with generalized tonic-clonic seizure due to an acute infantile hypocalcemia and vitamin D deficiency. He also had occult, unexplained cholestatic liver disease and impairment of 25-hydroxylation of vitamin D secondary to hepatic steatosis. Sudden unexpected death occurred at 8 months. Molecular analysis identified a homozygous 1528G-C mutation (E510Q; 600890.0001) in the HADHA gene. The mother had preeclampsia during the third trimester of her pregnancy. </p><p>In 2 girls, aged 8 and 15 years, with LCHAD deficiency, Schrijver-Wieling et al. (1997) observed extensive macular pigmentary depositions and a 'salt and pepper' scattering of pigment in their retinas. They had decreasing visual acuity. The investigators suggested that testing for LCHAD deficiency should be included in the diagnostic process in children with retinal dystrophy, in particular when other clinical symptoms suggesting this disorder occur. Uusimaa et al. (1997) reported 2 unrelated boys with pigmentary retinopathy in association with a mild clinical presentation of LCHAD deficiency. </p><p>Tyni et al. (2002) noted that pigmentary retinopathy is an important feature of LCHAD deficiency. In studies in cultured porcine retinal pigment epithelium (RPE) cells, they presented strong in vitro evidence for the presence of mitochondrial fatty acid beta-oxidation in RPE cells and the expression of the MTP in the RPE and other layers of the retina. </p><p>Sewell et al. (1994) stated that most reported cases were diagnosed at the age of several months and presented with fasting-induced hypoketotic hypoglycemia and muscular hypotonia. Thiel et al. (1999) reported a patient presenting 20 hours after birth with signs of tachypnea, hypotonia, and mild retractions, and Carpenter and Wilcken (1999) described a patient who developed hypoglycemia at birth; on dietary treatment, both patients remained well. </p><p>Although the mortality rate among children with deficiency of LCHAD or complete deficiency of the trifunctional protein had been reported to be 75 to 90%, Ibdah et al. (1999) found that 67% of the affected children in their study were alive and receiving dietary treatment at the most recent follow-up, and most were able to attend school. Dietary treatment of children with fatty-acid oxidation disorders dramatically reduces morbidity and mortality. </p><p>Van Hove et al. (2000) reviewed the acylcarnitines in plasma and blood spots of patients with LCHAD deficiency. Long-chain 3-hydroxyacylcarnitines of C14:1, C14, C16, and C18:1 chain length, and long-chain acylcarnitines of C12, C14:1, C14, C16, C18:2, and C18:1 chain length were elevated. Acetylcarnitine was decreased. In plasma, elevation of hydroxy-C18:1 acylcarnitine over the 95th centile of controls, in combination with an elevation of 2 of the 3 acylcarnitines C14, C14:1, and hydroxy-C16, identified over 85% of patients with high specificity (less the 0.1% false-positive rate). High endogenous levels of long-chain acylcarnitines in normal erythrocytes reduced the diagnostic specificity in blood spots compared with plasma samples. The results were diagnostic in the asymptomatic patients. Treatment with a diet low in fat and high in medium-chain triglyceride decreased all disease-specific acylcarnitines, often to normal, suggesting that this assay is useful in treatment monitoring. </p><p>Den Boer et al. (2002) reviewed the clinical presentation and follow-up of 50 patients with LCHAD deficiency. The mean age at presentation was 5.8 months (range, 1 day to 26 months). Seven (15%) of the patients presented in the neonatal period (0-4 weeks of age). Thirty-nine patients (78%) presented with acute hypoketotic hypoglycemia. The other 11 patients (22%) presented with a more chronic disorder consisting of cholestatic liver disease, failure to thrive, feeding difficulties, and/or hypotonia. Further analysis of the clinical history of the patients presenting with acute hypoglycemia revealed that 32 (82%) of the 39 patients had a combination of nonspecific symptoms likely related to LCHAD deficiency including cardiomyopathy, feeding difficulties, hepatomegaly, and hypotonia. Mortality in the series was high (38%), with patients all dying before or within 3 months after diagnosis. Despite dietary treatment consisting of avoidance of fasting and a carbohydrate-rich, fat-restricted diet, morbidity in the surviving patients was high, with recurrent metabolic crises occurring in 8 of 31 survivors (26%) and recurrent muscle pains with elevated creatine kinase (CK) levels in 10 of 31 survivors (32%). </p><p>Fryburg et al. (1994) suggested that LCHAD deficiency is responsible for the lipid myopathy in Bannayan-Riley-Ruvalcaba syndrome (see 158350), an autosomal dominant condition of macrocephaly in combination with lipomas/hemangiomas and developmental delay. </p><p><strong><em>Acute Fatty Liver Pregnancy (AFLP) and Hypertension, Elevated Liver Enzymes, and Low Platelet (HELLP) Syndromes</em></strong></p><p>
Wilcken et al. (1993) and Treem et al. (1994) noted that isolated LCHAD deficiency in children may be associated with severe maternal illness occurring during pregnancies with affected fetuses. These maternal illnesses include the acute fatty liver pregnancy (AFLP) syndrome; hypertension or hemolysis, elevated liver enzymes, and low platelets (HELLP) syndrome; and hyperemesis gravidarum. The AFLP syndrome is characterized by anorexia, nausea, vomiting, abdominal pain, and jaundice in the third trimester. Fulminant liver failure and death may occur. HELLP syndrome is more common and may represent the severe end of the spectrum of preeclampsia. In both syndromes, microvesicular fatty infiltration of maternal liver occurs, a pathologic picture similar to that in children with fatty acid oxidation defects. Thus, AFLP and HELLP are genetic disorders due to a primary defect in the fetus. </p><p>Ibdah et al. (1999) stated that little is known about the mechanism of the association between isolated deficiency of LCHAD in a fetus with the common 1528G-C mutation (600890.0001) on at least one allele and liver disease in the mother during the pregnancy. They hypothesized that in the presence of the 1528G-C mutation, long-chain 3-hydroxyacyl metabolites produced by the fetus or placenta accumulate in the mother and are highly toxic to the liver; this reaction is perhaps exaggerated by the decreased metabolic utilization of fatty acids during pregnancy. </p><p>Ibdah et al. (2001) performed molecular prenatal diagnosis in 9 pregnancies, 8 in 6 families with isolated LCHAD deficiency and 1 in a family with complete trifunctional protein deficiency. Analyses were performed on chorionic villus samples in 7 pregnancies and on amniocytes in 2. Molecular prenatal diagnosis successfully identified the fetal genotype in all 9 pregnancies. Two fetuses were affected, and the pregnancies were terminated. Two other fetuses had normal genotype and 5 others were heterozygotes. All 7 pregnancies were uncomplicated and all the offspring were liveborn and healthy. Ibdah et al. (2001) concluded that women heterozygous for trifunctional protein alpha-subunit mutations who carry fetuses with wildtype or heterozygous genotypes have uncomplicated pregnancies. </p>
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<strong>Biochemical Features</strong>
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<p>Elizondo et al. (2020) studied plasma acylcarnitine levels in 11 patients with LCHAD deficiency after an overnight fast, after a meal, and after exercise. After an overnight fast, the highest long chain acylcarnitine species level was 18:1-OH. After a meal, the 18:1-OH level decreased by 59% and after exercise the 18:1 did not appreciably change. Elizondo et al. (2020) next correlated the sum of long chain acylcarnitines with free fatty acids after an overnight fast, after a meal, and after exercise to determine the contribution of lipolysis to long chain acylcarnitines in the 11 patients with LCHAD deficiency, 11 patients with CPT2 deficiency (255110), and 8 patients with VLCAD deficiency (201475). The free fatty acids correlated to total long chain acylcarnitines after overnight fasting but not after exercise, indicating that lipolysis is a significant contributor to acylcarnitine levels with fasting but not exercise. </p>
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<strong>Clinical Management</strong>
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<p>Jones et al. (2003) analyzed the effects of dietary treatment of LCHAD deficiency in an in vitro model of cultured skin fibroblasts from 2 patients with LCHAD deficiency, 1 with MPT deficiency, and controls. The results suggested that a medium-chain triglyceride preparation reduces the accumulation of potentially toxic long-chain 3-hydroxy-fatty acids in LCHAD deficiency and that a preparation with a higher ratio of decanoate to octanoate may be most effective. </p><p>Guffon et al. (2021) described clinical response to treatment with triheptanoin in 18 patients with disorders of long chain fatty acid oxidation, including 5 with VLCAD deficiency (201475), 5 with LCHAD deficiency, 3 with CACT deficiency (212138), 3 with CPT II deficiency (600649), and 2 with MTP deficiency (609015). Treatment duration was for an average of 22 months, with a range of 9 to 228 months. Ten of 12 pediatric patients and 4 of 6 adult patients reported reduction in fatigue and weakness. Eight of 12 pediatric patients and 3 of 6 adult patients experienced reduced intensity of myalgia. Episodes of rhabdomyolysis decreased in 8 of 12 pediatric patients and 3 of 6 adult patients. Of 3 patients who had severe hypoglycemic events in the year prior to starting triheptanoin, none had these events in the year following initiation of therapy. On average, emergency hospital care visits and days of emergency home care were also reduced. </p>
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<strong>Molecular Genetics</strong>
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<p>To identify the molecular basis of the deficiency in 26 Dutch patients with a deficiency in long-chain 3-hydroxyacyl-CoA dehydrogenase, IJlst et al. (1994) sequenced the cDNAs encoding the alpha and beta subunits of the trifunctional enzyme and identified a 1528G-C transversion in the dehydrogenase-encoding region of the alpha subunit. The single base change resulted in an glu510-to-gln (E510Q; 600890.0001) amino acid substitution, based on numbering from the start codon. The base substitution created a PstI restriction site. Using RFLP methods, they found that in 24 of 26 unrelated patients, only the 1528C was expressed. The other 2 patients were compound heterozygotes with 1 allele carrying this mutation. IJlst et al. (1996) used S. cerevisiae for expression of wildtype and mutant protein to show that the 1528G-C mutation is directly responsible for the loss of LCHAD activity. Furthermore, they described a newly developed method allowing identification of the 1528G-C mutation in genomic DNA. The finding of an 87% allele frequency of this mutation in 34 LCHAD-deficient patients made this a valuable test for prenatal diagnosis. IJlst et al. (1996) showed that the E510Q mutation is directly responsible for the loss of dehydrogenase activity without changing the structure of the enzyme complex. </p><p>Sims et al. (1995) used single-strand conformation variance (SSCV) analysis of the exons encoding the alpha subunit of trifunctional protein to elucidate the molecular defects (see, e.g., 600890.0001-600890.0002) in 3 families with children with isolated LCHAD deficiency and mothers with either AFLP syndrome or HELLP syndrome. Based on numbering of the mature peptide, Sims et al. (1995) designated the 1528G-C mutation as glu474-to-gln (E474Q). </p>
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<strong>Inheritance</strong>
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<p>LCHAD deficiency usually shows autosomal recessive inheritance. Baskin et al. (2010) reported an unusual case of LCHAD deficiency due to paternal isodisomy of chromosome 2. The patient was a 22-month-old child identified by newborn screening. Molecular analysis showed homozygosity for the common 1528G-C mutation (E510Q; 600890.0001), but only the father was found to be heterozygous for the mutation; it was not present in the mother. Genotype analysis of chromosome 2 using STR markers demonstrated uniparental isodisomy. The patient did not have other phenotypic abnormalities, suggesting that chromosome 2 is not imprinted. The finding was important, as it reduced the recurrence risk of this disease for this couple. </p>
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<strong>Population Genetics</strong>
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<p>Ibdah et al. (1999) found 17 different mutations among the 24 children in their study. In the 19 children with isolated deficiency of LCHAD, 71% of alleles had the E510Q mutation, and none of the 10 alleles (all of which were abnormal) in the 5 children with trifunctional protein deficiency had this mutation. Among 351 normal subjects, they found that 2 were heterozygous for the E510Q mutation. If this group of subjects was representative of the general population, then isolated deficiency of LCHAD would occur once in every 62,000 pregnancies, and either trifunctional protein or long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency would occur once in 38,000 pregnancies. </p>
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<span class="mim-font">
<strong>See Also:</strong>
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<span class="mim-text-font">
Jackson et al. (1992); Wanders et al. (1992)
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<h4>
<span class="mim-font">
<strong>REFERENCES</strong>
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<ol>
<li>
<p class="mim-text-font">
Baskin, B., Geraghty, M., Ray, P. N.
<strong>Paternal isodisomy of chromosome 2 as a cause of long chain 3-hydroxyacyl-CoA dehydrogenase (LCHAD) deficiency.</strong>
Am. J. Med. Genet. 152A: 1808-1811, 2010.
[PubMed: 20583174]
[Full Text: https://doi.org/10.1002/ajmg.a.33462]
</p>
</li>
<li>
<p class="mim-text-font">
Bertini, E., Dionisi-Vici, C., Garavaglia, B., Burlina, A. B., Sabatelli, M., Rimoldi, M., Bartuli, A., Sabetta, G., DiDonato, S.
<strong>Peripheral sensory-motor polyneuropathy, pigmentary retinopathy, and fatal cardiomyopathy in long-chain 3-hydroxy-acyl-CoA dehydrogenase deficiency.</strong>
Europ. J. Pediat. 151: 121-126, 1992.
[PubMed: 1537353]
[Full Text: https://doi.org/10.1007/BF01958956]
</p>
</li>
<li>
<p class="mim-text-font">
Carpenter, K. H., Wilcken, B.
<strong>Neonatal diagnosis of long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency and implications for newborn screening by tandem mass spectrometry.</strong>
J. Inherit. Metab. Dis. 22: 840-841, 1999.
[PubMed: 10518286]
[Full Text: https://doi.org/10.1023/a:1005566309942]
</p>
</li>
<li>
<p class="mim-text-font">
den Boer, M. E. J., Wanders, R. J. A., Morris, A. A. M., IJlst, L., Heymans, H. S. A., Wijburg, F. A.
<strong>Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: clinical presentation and follow-up of 50 patients.</strong>
Pediatrics 109: 99-104, 2002.
[PubMed: 11773547]
[Full Text: https://doi.org/10.1542/peds.109.1.99]
</p>
</li>
<li>
<p class="mim-text-font">
Duran, M., Wanders, R. J. A., de Jager, J. P., Dorland, L., Bruinvis, L., Ketting, D., Ijlst, L., van Sprang, F. J.
<strong>3-Hydroxydicarboxylic aciduria due to long-chain 3-hydroxyacyl-coenzyme A dehydrogenase deficiency associated with sudden neonatal death: protective effect of medium-chain triglyceride treatment.</strong>
Europ. J. Pediat. 150: 190-195, 1991.
[PubMed: 2044590]
[Full Text: https://doi.org/10.1007/BF01963564]
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<li>
<p class="mim-text-font">
Elizondo, G., Matern, D., Vockley, J., Harding, C. O., Gillingham, M. B.
<strong>Effects of fasting, feeding and exercise on plasma acylcarnitines among subjects with CPT2D, VLCADD and LCHADD/TFPD.</strong>
Molec. Genet. Metab. 131: 90-97, 2020.
[PubMed: 32928639]
[Full Text: https://doi.org/10.1016/j.ymgme.2020.09.001]
</p>
</li>
<li>
<p class="mim-text-font">
Fryburg, J. S., Pelegano, J. P., Bennett, M. J., Bebin, E. M.
<strong>Long-chain 3-hydroxyacyl-coenzyme A dehydrogenase (L-CHAD) deficiency in a patient with the Bannayan-Riley-Ruvalcaba syndrome.</strong>
Am. J. Med. Genet. 52: 97-102, 1994.
[PubMed: 7977472]
[Full Text: https://doi.org/10.1002/ajmg.1320520119]
</p>
</li>
<li>
<p class="mim-text-font">
Guffon, N., Mochel, F., Schiff, M., De Lonlay, P., Douillard, C., Vianey-Saban, C.
<strong>Clinical outcomes in a series of 18 patients with long chain fatty acids oxidation disorders treated with triheptanoin for a median duration of 22 months.</strong>
Molec. Genet. Metab. 132: 227-233, 2021.
[PubMed: 33610471]
[Full Text: https://doi.org/10.1016/j.ymgme.2021.02.003]
</p>
</li>
<li>
<p class="mim-text-font">
Hagenfeldt, L., von Dobeln, U., Holme, E., Alm, J., Brandberg, G., Enocksson, E., Lindeberg, L.
<strong>3-Hydroxydicarboxylic aciduria--a fatty acid oxidation defect with severe prognosis.</strong>
J. Pediat. 116: 387-392, 1990.
[PubMed: 2308028]
[Full Text: https://doi.org/10.1016/s0022-3476(05)82826-4]
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</li>
<li>
<p class="mim-text-font">
Ibdah, J. A., Bennett, M. J., Rinaldo, P., Zhao, Y., Gibson, B., Sims, H. F., Strauss, A. W.
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Ibdah, J. A., Dasouki, M. J., Strauss, A. W.
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Biochim. Biophys. Acta 1215: 347-350, 1994.
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Jackson, S., Bartlett, K., Land, J., Moxon, E. R., Pollitt, R. J., Leonard, J. V., Turnbull, D. M.
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Pediat. Res. 29: 406-411, 1991.
[PubMed: 1830138]
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Jackson, S., Kler, R. S., Bartlett, K., Briggs, H., Bindoff, L. A., Pourfarzam, M., Gardner-Medwin, D., Turnbull, D. M.
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Jones, P. M., Butt, Y., Bennett, M. J.
<strong>Accumulation of 3-hydroxy-fatty acids in the culture medium of long-chain L-3-hydroxyacyl CoA dehydrogenase (LCHAD) and mitochondrial trifunctional protein-deficient skin fibroblasts: implications for medium chain triglyceride dietary treatment of LCHAD deficiency.</strong>
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Rocchiccioli, F., Wanders, R. J. A., Aubourg, P., Vianey-Liaud, C., Ijlst, L., Fabre, M., Cartier, N., Bougneres, P.-F.
<strong>Deficiency of long-chain 3-hydroxyacyl-CoA dehydrogenase: a cause of lethal myopathy and cardiomyopathy in early childhood.</strong>
Pediat. Res. 28: 657-662, 1990.
[PubMed: 2284166]
[Full Text: https://doi.org/10.1203/00006450-199012000-00023]
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Schrijver-Wieling, I., van Rens, G. H. M. B., Wittebol-Post, D., Smeitink, J. A. M., de Jager, J. P., de Klerk, H. B. C., van Lith, G. H. M.
<strong>Retinal dystrophy in long chain 3-hydroxy-acyl-CoA dehydrogenase deficiency.</strong>
Brit. J. Ophthal. 81: 291-294, 1997.
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Sewell, A. C., Bender, S. W., Wirth, S., Munterfering, H., Ijlist, L., Wanders, R. J. A.
<strong>Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: a severe fatty acid oxidation disorder.</strong>
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Thiel, C., Baudach, S., Schnackenberg, U., Vreken, P., Wanders, R. J. A.
<strong>Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency: neonatal manifestation at the first day of life presenting with tachypnoea.</strong>
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Tyni, T., Palotie, A., Viinikka, L., Valanne, L., Salo, M. K., von Dobeln, U., Jackson, S., Wanders, R., Venizelos, N., Pihko, H.
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Uusimaa, J., Vainionpaa, L., Simila, S., Miettinen, R., Nuutinen, M.
<strong>L-3-hydroxyacyl-CoA dehydrogenase deficiency: two cases with pigmentary retinopathy.</strong>
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