nih-gov/www.ncbi.nlm.nih.gov/omim/605355

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<title>
Entry
- #605355 - NEMALINE MYOPATHY 5A, AUTOSOMAL RECESSIVE, SEVERE INFANTILE; NEM5A
- OMIM
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<span class="h4">#605355</span>
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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/605355"><strong>Clinical Synopsis</strong></a>
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<a href="/phenotypicSeries/PS161800"> <strong>Phenotypic Series</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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<li role="presentation" style="margin-left: 1em">
<a href="#inheritance">Inheritance</a>
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<a href="#mapping">Mapping</a>
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<a href="#molecularGenetics">Molecular Genetics</a>
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<a href="#populationGenetics">Population Genetics</a>
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<div id="mimClinicalResourcesLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5; display: table-cell;">&#9660;</div>
&nbsp;
<div style="display: table-cell;">Clinical Resources</div>
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<div><a href="https://clinicaltrials.gov/search?cond=(NEMALINE MYOPATHY 5A, AUTOSOMAL RECESSIVE, SEVERE INFANTILE) OR (TNNT1)" class="mim-tip-hint" title="Clinical Trials" 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=13919&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>
<div><a href="https://www.diseaseinfosearch.org/x/5127" class="mim-tip-hint" title="Network of disease-specific advocacy organizations, universities, private companies, government agencies, and public policy organizations." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Genetic Alliance', 'domain': 'diseaseinfosearch.org'})">Genetic Alliance</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/gtr/all/tests/?term=605355[mim]" class="mim-tip-hint" title="Genetic Testing Registry." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'GTR', 'domain': 'ncbi.nlm.nih.gov'})">GTR</a></div>
<div><a href="https://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&Expert=98902" class="mim-tip-hint" title="European reference portal for information on rare diseases and orphan drugs." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'OrphaNet', 'domain': 'orpha.net'})">OrphaNet</a></div>
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<div class="panel panel-default" style="margin-top: 0px; border-radius: 0px">
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<div style="display: table-cell;">Animal Models</div>
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<div><a href="https://www.alliancegenome.org/disease/DOID:0110936" class="mim-tip-hint" title="Search Across Species; explore model organism and human comparative genomics." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Alliance Genome', 'domain': 'alliancegenome.org'})">Alliance Genome</a></div>
<div><a href="http://www.informatics.jax.org/disease/605355" class="mim-tip-hint" title="Phenotypes, alleles, and disease models from Mouse Genome Informatics." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'MGI Mouse Phenotype', 'domain': 'informatics.jax.org'})">MGI Mouse Phenotype</a></div>
<div><a href="https://omia.org/OMIA002285/" class="mim-tip-hint" title="Online Mendelian Inheritance in Animals (OMIA) is a database of genes, inherited disorders and traits in 191 animal species (other than human and mouse.)" target="_blank">OMIA</a></div>
<div><a href="https://wormbase.org/resources/disease/DOID:0110936" class="mim-tip-hint" title="Database of the biology and genome of Caenorhabditis elegans and related nematodes." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Wormbase Disease Ontology', 'domain': 'wormbase.org'})">Wormbase Disease Ontology</a></div>
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<div class="panel-heading mim-panel-heading" role="tab" id="mimCellLines">
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<div id="mimCellLinesLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5; display: table-cell;">&#9658;</div>
&nbsp;
<div style="display: table-cell;">Cell Lines</div>
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</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:605355" 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>
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</div>
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<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;
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</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> 1197155007<br />
<strong>ORPHA:</strong> 98902<br />
<strong>DO:</strong> 0110936<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>
605355
</span>
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</div>
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<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
NEMALINE MYOPATHY 5A, AUTOSOMAL RECESSIVE, SEVERE INFANTILE; NEM5A
</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">
NEMALINE MYOPATHY, AMISH TYPE; ANM<br />
AMISH NEMALINE MYOPATHY
</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/19/1155?start=-3&limit=10&highlight=1155">
19q13.42
</a>
</span>
</td>
<td>
<span class="mim-font">
Nemaline myopathy 5A, autosomal recessive, severe infantile
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605355"> 605355 </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">
TNNT1
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/191041"> 191041 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="btn-group ">
<a href="/clinicalSynopsis/605355" 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')">
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<span class="sr-only">Toggle Dropdown</span>
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&nbsp;
<div class="btn-group">
<a href="/phenotypicSeries/PS161800" class="btn btn-info" role="button"> Phenotypic Series </a>
<button type="button" id="mimPhenotypicSeriesToggle" class="btn btn-info dropdown-toggle mimSingletonFoldToggle" data-toggle="collapse" href="#mimPhenotypicSeriesFold" onclick="ga('send', 'event', 'Unfurl', 'PhenotypicSeries', 'omim.org')">
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&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/605355" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/605355" 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> HEAD & NECK </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Neck </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Limited neck motion <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5829777&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5829777</a>]</span><br /> -
Cervical stiffness <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5829778&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5829778</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> RESPIRATORY </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Respiratory insufficiency <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/409622000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">409622000</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/409623005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">409623005</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/J96.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">J96.9</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1145670&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1145670</a>, <a href="https://bioportal.bioontology.org/search?q=C0035229&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0035229</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002878" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002878</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0002093" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002093</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002093" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002093</a>]</span><br /> -
Respiratory failure <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/409622000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">409622000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/J96.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">J96.9</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1145670&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1145670</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002878" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002878</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002878" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002878</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> CHEST </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> External Features </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Chest wall rigidity <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0239006&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0239006</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Ribs Sternum Clavicles & Scapulae </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Pectus carinatum, severe <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1854382&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1854382</a>]</span> <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/205101001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">205101001</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/38774000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">38774000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q67.7" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q67.7</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/754.82" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">754.82</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000768" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000768</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> SKELETAL </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Contractures, proximal, progressive <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5829779&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5829779</a>]</span><br />
</span>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Spine </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Kyphoscoliosis <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405771009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405771009</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405772002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405772002</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405773007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405773007</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/M41" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">M41</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0600033&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0600033</a>, <a href="https://bioportal.bioontology.org/search?q=C0575158&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0575158</a>, <a href="https://bioportal.bioontology.org/search?q=C0345392&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0345392</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002751" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002751</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0008453" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0008453</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002751" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002751</a>]</span><br /> -
Rigid spine <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1858025&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1858025</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003306" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003306</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003306" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003306</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Pelvis </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Limited hip abduction <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836589&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836589</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003184" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003184</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003184" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003184</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Limbs </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Large joint contractures, progressive <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5829780&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5829780</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">
- 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 /> -
Axial muscle weakness <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1843697&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1843697</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003327" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003327</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003327" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003327</a>]</span><br /> -
Muscle atrophy <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/88092000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">88092000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0541794&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0541794</a>, <a href="https://bioportal.bioontology.org/search?q=C0026846&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0026846</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003202" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003202</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003202" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003202</a>]</span><br /> -
Tremor at birth, especially jaw muscles and lower limb muscles (in some patients) <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5829774&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5829774</a>]</span><br /> -
Tremors subside over the first 2 to 3 months of life (in some patients) <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1854384&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1854384</a>]</span><br /> -
Nemaline bodies (rods) on Gomori trichrome staining seen on muscle biopsy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3805773&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3805773</a>]</span><br /> -
Type 1 muscle fiber predominance <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1854387&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1854387</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003803" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003803</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003803" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003803</a>]</span><br /> -
Nonspecific myopathic changes without dystrophic or inflammatory changes seen on muscle biopsy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3805774&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3805774</a>]</span><br /> -
Myofibrillar disruption seen on muscle biopsy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5829775&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5829775</a>]</span><br /> -
Myofiber degeneration seen on muscle biopsy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5829776&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5829776</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">
- Delayed gross motor development <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/430099007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">430099007</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1837658&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1837658</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002194" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002194</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002194" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002194</a>]</span><br /> -
Normal intelligence <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/26941006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">26941006</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0423900&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0423900</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">
- Hyporeflexia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/835279003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">835279003</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405946002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405946002</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0700078&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0700078</a>, <a href="https://bioportal.bioontology.org/search?q=C0151888&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0151888</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001265" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001265</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0001315" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001315</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001265" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001265</a>]</span><br /> -
Areflexia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/37280007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">37280007</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0234146&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0234146</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001284" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001284</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001284" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001284</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MISCELLANEOUS </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Onset in infancy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1848924&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1848924</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003593" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003593</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003593" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003593</a>]</span><br /> -
Death secondary to respiratory insufficiency<br /> -
High prevalence among Old Order Amish in Lancaster County, Pennsylvania<br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MOLECULAR BASIS </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Caused by mutation in the troponin T1 gene (TNNT1, <a href="/entry/191041#0001">191041.0001</a>)<br />
</span>
</div>
</div>
</div>
<div class="text-right">
<a href="#mimClinicalSynopsisFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
</div>
</div>
</div>
<div id="mimPhenotypicSeriesFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small">
<div class="row">
<div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
<h5>
Nemaline myopathy
- <a href="/phenotypicSeries/PS161800">PS161800</a>
- 13 Entries
</h5>
</div>
</div>
<div class="row" style="margin-left: 0.125em; margin-right: 0.125em;">
<table class="table table-bordered table-condensed table-hover mim-table-padding">
<thead>
<tr>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Location</strong>
</th>
<th class="col-lg-5 col-md-5 col-sm-5 col-xs-6 text-nowrap">
<strong>Phenotype</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Inheritance</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Phenotype<br />mapping key</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Phenotype<br />MIM number</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Gene/Locus</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Gene/Locus<br />MIM number</strong>
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/1184?start=-3&limit=10&highlight=1184"> 1q21.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609284"> Congenital myopathy 4B, autosomal recessive </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">
<a href="/entry/609284"> 609284 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/191030"> TPM3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/191030"> 191030 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/1785?start=-3&limit=10&highlight=1785"> 1q42.13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/161800"> Congenital myopathy 2A, typical, autosomal dominant </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</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">
<a href="/entry/161800"> 161800 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/102610"> ACTA1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/102610"> 102610 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/2/688?start=-3&limit=10&highlight=688"> 2q23.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/256030"> Nemaline myopathy 2, autosomal recessive </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>
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<span class="mim-font">
<a href="/entry/256030"> 256030 </a>
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<span class="mim-font">
<a href="/entry/161650"> NEB </a>
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<span class="mim-font">
<a href="/entry/161650"> 161650 </a>
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<span class="mim-font">
<a href="/geneMap/2/758?start=-3&limit=10&highlight=758"> 2q31.1 </a>
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<span class="mim-font">
<a href="/entry/615731"> Nemaline myopathy 9 </a>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
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<span class="mim-font">
<a href="/entry/615731"> 615731 </a>
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<span class="mim-font">
<a href="/entry/607701"> KLHL41 </a>
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<span class="mim-font">
<a href="/entry/607701"> 607701 </a>
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<span class="mim-font">
<a href="/geneMap/3/208?start=-3&limit=10&highlight=208"> 3p22.1 </a>
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</td>
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<span class="mim-font">
<a href="/entry/615348"> Nemaline myopathy 8, autosomal recessive </a>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
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<span class="mim-font">
<a href="/entry/615348"> 615348 </a>
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<span class="mim-font">
<a href="/entry/615340"> KLHL40 </a>
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<span class="mim-font">
<a href="/entry/615340"> 615340 </a>
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<span class="mim-font">
<a href="/geneMap/3/452?start=-3&limit=10&highlight=452"> 3p14.1 </a>
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</td>
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<span class="mim-font">
<a href="/entry/616165"> Nemaline myopathy 10 </a>
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</td>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
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<span class="mim-font">
<a href="/entry/616165"> 616165 </a>
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<span class="mim-font">
<a href="/entry/616112"> LMOD3 </a>
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<span class="mim-font">
<a href="/entry/616112"> 616112 </a>
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<span class="mim-font">
<a href="/geneMap/9/172?start=-3&limit=10&highlight=172"> 9p13.3 </a>
</span>
</td>
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<span class="mim-font">
<a href="/entry/609285"> Congenital myopathy 23 </a>
</span>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
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<span class="mim-font">
<a href="/entry/609285"> 609285 </a>
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</td>
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<span class="mim-font">
<a href="/entry/190990"> TPM2 </a>
</span>
</td>
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<span class="mim-font">
<a href="/entry/190990"> 190990 </a>
</span>
</td>
</tr>
<tr>
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<span class="mim-font">
<a href="/geneMap/10/239?start=-3&limit=10&highlight=239"> 10q21.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617336"> Congenital myopathy 24 </a>
</span>
</td>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
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<span class="mim-font">
<a href="/entry/617336"> 617336 </a>
</span>
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<span class="mim-font">
<a href="/entry/608517"> MYPN </a>
</span>
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<span class="mim-font">
<a href="/entry/608517"> 608517 </a>
</span>
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<tr>
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<span class="mim-font">
<a href="/geneMap/14/164?start=-3&limit=10&highlight=164"> 14q13.1 </a>
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<span class="mim-font">
<a href="/entry/610687"> Nemaline myopathy 7, autosomal recessive </a>
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<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
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<span class="mim-font">
<a href="/entry/610687"> 610687 </a>
</span>
</td>
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<span class="mim-font">
<a href="/entry/601443"> CFL2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601443"> 601443 </a>
</span>
</td>
</tr>
<tr>
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<span class="mim-font">
<a href="/geneMap/15/292?start=-3&limit=10&highlight=292"> 15q22.31 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609273"> Nemaline myopathy 6, autosomal dominant </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
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<span class="mim-font">
<a href="/entry/609273"> 609273 </a>
</span>
</td>
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<span class="mim-font">
<a href="/entry/613727"> KBTBD13 </a>
</span>
</td>
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<span class="mim-font">
<a href="/entry/613727"> 613727 </a>
</span>
</td>
</tr>
<tr>
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<span class="mim-font">
<a href="/geneMap/19/1155?start=-3&limit=10&highlight=1155"> 19q13.42 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/620386"> Nemaline myopathy 5B, autosomal recessive, childhood-onset </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
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<span class="mim-font">
<a href="/entry/620386"> 620386 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/191041"> TNNT1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/191041"> 191041 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/1155?start=-3&limit=10&highlight=1155"> 19q13.42 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605355"> Nemaline myopathy 5A, autosomal recessive, severe infantile </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
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<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
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<span class="mim-font">
<a href="/entry/605355"> 605355 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/191041"> TNNT1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/191041"> 191041 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/1155?start=-3&limit=10&highlight=1155"> 19q13.42 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/620389"> Nemaline myopathy 5C, autosomal dominant </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</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>
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<span class="mim-font">
<a href="/entry/620389"> 620389 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/191041"> TNNT1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/191041"> 191041 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
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<a href="#mimPhenotypicSeriesFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
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<div>
<a id="text" class="mim-anchor"></a>
<h4 href="#mimTextFold" id="mimTextToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimTextToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<span class="mim-tip-floating" qtip_title="<strong>Looking For More References?</strong>" qtip_text="Click the 'reference plus' icon &lt;span class='glyphicon glyphicon-plus-sign'&gt;&lt;/span&gt at the end of each OMIM text paragraph to see more references related to the content of the preceding paragraph.">
<strong>TEXT</strong>
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</h4>
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<p>A number sign (#) is used with this entry because of evidence that autosomal recessive severe infantile nemaline myopathy-5A (NEM5A), also known as Amish nemaline myopathy, is caused by homozygous or compound heterozygous mutation in the gene encoding troponin T1 (TNNT1; <a href="/entry/191041">191041</a>) on chromosome 19q13.</p>
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<br />
</div>
</div>
<div>
<a id="description" class="mim-anchor"></a>
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<strong>Description</strong>
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<p>Autosomal recessive severe infantile nemaline myopathy-5A (NEM5A) is a skeletal muscle disorder characterized by symptom onset soon after birth or in early infancy. Affected infants show axial hypotonia, stiffness, rigid spine with progressive kyphosis, pectus deformities, and contractures or limited movement of the large joints. Some patients show transient tremors. There is muscle atrophy and poor gross motor development. Respiratory insufficiency develops in the first years of life, often leading to death. Muscle biopsy shows nemaline rods (<a href="#3" class="mim-tip-reference" title="Johnston, J. J., Kelley, R. I., Crawford, T. O., Morton, D. H., Agarwala, R., Koch, T., Schaffer, A. A., Francomano, C. A., Biesecker, L. G. &lt;strong&gt;A novel nemaline myopathy in the Amish caused by a mutation in troponin T1.&lt;/strong&gt; Am. J. Hum. Genet. 67: 814-821, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10952871/&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;10952871&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=10952871[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/10.1086/303089&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="10952871">Johnston et al., 2000</a>; <a href="#2" class="mim-tip-reference" title="Geraud, J., Dieterich, K., Rendu, J., Uro Coste, E., Dobrzynski, M., Marcorelle, P., Ioos, C., Romero, N. B., Baudou, E., Brocard, J., Coville, A.-C., Faure, J., and 10 others. &lt;strong&gt;Clinical phenotype and loss of the slow skeletal muscle troponin T in three new patients with recessive TNNT1 nemaline myopathy.&lt;/strong&gt; J. Med. Genet. 58: 602-608, 2021.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/32994279/&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;32994279&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=32994279[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/10.1136/jmedgenet-2019-106714&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="32994279">Geraud et al., 2021</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?term=32994279+10952871" 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>For a discussion of genetic heterogeneity of nemaline myopathy, see NEM2 (<a href="/entry/256030">256030</a>).</p>
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<strong>Clinical Features</strong>
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<p>Between 1988 and 2000, <a href="#3" class="mim-tip-reference" title="Johnston, J. J., Kelley, R. I., Crawford, T. O., Morton, D. H., Agarwala, R., Koch, T., Schaffer, A. A., Francomano, C. A., Biesecker, L. G. &lt;strong&gt;A novel nemaline myopathy in the Amish caused by a mutation in troponin T1.&lt;/strong&gt; Am. J. Hum. Genet. 67: 814-821, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10952871/&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;10952871&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=10952871[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/10.1086/303089&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="10952871">Johnston et al. (2000)</a> treated or obtained clinical information on 71 infants and young children from 33 nuclear families with an apparently unique form of nemaline myopathy. Since the disorder occurred among the Old Order Amish of Lancaster County, Pennsylvania, the authors referred to the autosomal recessive disorder as Amish nemaline myopathy (ANM). All neonates with ANM had tremors that were evident at birth or within a few days of birth and involved most skeletal muscle groups, especially the muscles of the jaw and lower limbs. These tremors subsided over the first 2 to 3 months of life. Mild proximal contractures present at birth gradually worsened with age, such that hip abduction was often limited to 10 degrees or less by age 12 months. Progressive muscle atrophy and weakness developed simultaneously with the contractures. Gross motor development was limited to rolling side to side, but forearm and hand function was normal, as was apparent intelligence. The characteristic severe pectus carinatum deformity, with rigidity of the chest wall, developed along with the proximal contractures. The authors suspected that tremors both in utero and for several weeks after birth might be a carrier manifestation: several sibs of affected individuals with normal outcomes had had abnormal trembling both in utero and for several weeks after birth. Neurologic examinations and, in one case, tests for hypoglycemia and hypocalcemia, were normal in these sibs. The disorder showed progressive worsening, resulting in death from respiratory insufficiency, usually in the second year of life. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10952871" 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="#1" class="mim-tip-reference" title="Fox, M. D., Carson, V. J., Feng, H.-Z., Lawlor, M. W., Gray, J. T., Brigatti, K. W., Jin, J.-P., Strauss, K. A. &lt;strong&gt;TNNT1 nemaline myopathy: natural history and therapeutic frontier.&lt;/strong&gt; Hum. Molec. Genet. 27: 3272-3282, 2018.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/29931346/&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;29931346&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=29931346[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/10.1093/hmg/ddy233&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="29931346">Fox et al. (2018)</a> described the natural history of ANM in 106 patients of Amish ancestry who were born between 1923 and 2017. In 18 patients for whom detailed developmental history was documented, birthweight was normal but 94% had growth failure by 9 months of age. Eleven patients rolled from supine to prone, but all subsequently lost this skill, and only 2 sat independently. Abnormalities in the neonatal period included axial hypotonia, limb and chin tremors, and sustained provoked clonus. The tremors subsided in the first few months as contractures developed. Muscle atrophy and weakness progressed with the development of contractures, and the patients developed pectus carinatum. Patients had recurrent upper and lower respiratory tract infections. Management was palliative in all of the patients, and there was no correlation between date of birth and length of survival. Among 82 patients for whom the data were available, median survival was 18 months with a range of 0.2 to 66 months. <a href="#1" class="mim-tip-reference" title="Fox, M. D., Carson, V. J., Feng, H.-Z., Lawlor, M. W., Gray, J. T., Brigatti, K. W., Jin, J.-P., Strauss, K. A. &lt;strong&gt;TNNT1 nemaline myopathy: natural history and therapeutic frontier.&lt;/strong&gt; Hum. Molec. Genet. 27: 3272-3282, 2018.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/29931346/&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;29931346&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=29931346[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/10.1093/hmg/ddy233&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="29931346">Fox et al. (2018)</a> examined skeletal muscle from 2 patients with AMN, which showed absent TNNT1, decreased slow skeletal TNNI1 (<a href="/entry/191042">191042</a>), and increased cardiac TNNT2 (<a href="/entry/191045">191045</a>). Histologic findings included abnormalities of myofiber size, increased numbers of internally nucleated fibers, and nemaline rods. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=29931346" 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="van der Pol, W. L., Leijenaar, J. F., Spliet, W. G. M., Lavrijsen, S. W., Jansen, N. J. G., Braun, K. P. J., Mulder, M., Timmers-Raaijmakers, B., Ratsma, K., Dooijes, D., van Haelst, M. M. &lt;strong&gt;Nemaline myopathy caused by TNNT1 mutations in a Dutch pedigree.&lt;/strong&gt; Molec. Genet. Genomic Med. 2: 134-137, 2014.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/24689076/&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;24689076&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=24689076[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/10.1002/mgg3.52&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="24689076">Van der Pol et al. (2014)</a> reported 3 patients from a large Dutch family with NEM5A. The proband presented at 2 months of age with stiffness, rigid spine, reduced cervical motion, and limited movements of the shoulders, hips, and knees. Reflexes were absent and tremors were not noted. Other features included kyphosis and pectus carinatum. By age 2 years, he developed respiratory insufficiency and feeding difficulties as well as diaphragmatic hernia, requiring surgery, tracheostomy, and gastrostomy. Family history revealed 2 paternal cousins who died at 3 and 5 years of age, respectively, due to respiratory insufficiency. They had severe hypotonia, joint contractures, pectus carinatum, and kyphosis. Muscle biopsy of the proband showed nemaline myopathy. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=24689076" 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="Geraud, J., Dieterich, K., Rendu, J., Uro Coste, E., Dobrzynski, M., Marcorelle, P., Ioos, C., Romero, N. B., Baudou, E., Brocard, J., Coville, A.-C., Faure, J., and 10 others. &lt;strong&gt;Clinical phenotype and loss of the slow skeletal muscle troponin T in three new patients with recessive TNNT1 nemaline myopathy.&lt;/strong&gt; J. Med. Genet. 58: 602-608, 2021.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/32994279/&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;32994279&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=32994279[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/10.1136/jmedgenet-2019-106714&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="32994279">Geraud et al. (2021)</a> reported 3 unrelated patients with NEM5A resulting in death from respiratory failure between 6 and 29 months of age. The patients had axial and peripheral hypotonia, delayed motor development, hyporeflexia, and progressive respiratory insufficiency. The older patients showed progressive kyphosis with rigid spine, limited hip and knee movement, and pectus deformities. Additional variable features included tongue fasciculations, tremor, torticollis, diaphragmatic palsy, facial hypomimia, high palate, and failure to thrive. Skeletal muscle biopsy showed fiber size variation, rods, and sarcomeric disorganization; endomysial fibrosis was sometimes seen. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=32994279" 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>The transmission pattern of NEM5A in the families reported by <a href="#3" class="mim-tip-reference" title="Johnston, J. J., Kelley, R. I., Crawford, T. O., Morton, D. H., Agarwala, R., Koch, T., Schaffer, A. A., Francomano, C. A., Biesecker, L. G. &lt;strong&gt;A novel nemaline myopathy in the Amish caused by a mutation in troponin T1.&lt;/strong&gt; Am. J. Hum. Genet. 67: 814-821, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10952871/&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;10952871&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=10952871[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/10.1086/303089&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="10952871">Johnston et al. (2000)</a> was consistent with autosomal recessive inheritance. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10952871" 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>Using a genealogy database, automated pedigree software, and linkage analysis of DNA samples from 4 sibships segregating Amish nemaline myopathy, <a href="#3" class="mim-tip-reference" title="Johnston, J. J., Kelley, R. I., Crawford, T. O., Morton, D. H., Agarwala, R., Koch, T., Schaffer, A. A., Francomano, C. A., Biesecker, L. G. &lt;strong&gt;A novel nemaline myopathy in the Amish caused by a mutation in troponin T1.&lt;/strong&gt; Am. J. Hum. Genet. 67: 814-821, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10952871/&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;10952871&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=10952871[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/10.1086/303089&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="10952871">Johnston et al. (2000)</a> identified an interval of approximately 2 cM on 19q13.4 that was homozygous in all affected individuals. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10952871" 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>Because the TNNT1 gene mapped within the candidate region on chromosome 19q13 for nemaline myopathy, <a href="#3" class="mim-tip-reference" title="Johnston, J. J., Kelley, R. I., Crawford, T. O., Morton, D. H., Agarwala, R., Koch, T., Schaffer, A. A., Francomano, C. A., Biesecker, L. G. &lt;strong&gt;A novel nemaline myopathy in the Amish caused by a mutation in troponin T1.&lt;/strong&gt; Am. J. Hum. Genet. 67: 814-821, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10952871/&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;10952871&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=10952871[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/10.1086/303089&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="10952871">Johnston et al. (2000)</a> sequenced the gene in Amish patients with the disorder and identified homozygosity for a nonsense mutation (E180X; <a href="/entry/191041#0001">191041.0001</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10952871" 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 a Dutch boy with NEM5A, <a href="#4" class="mim-tip-reference" title="van der Pol, W. L., Leijenaar, J. F., Spliet, W. G. M., Lavrijsen, S. W., Jansen, N. J. G., Braun, K. P. J., Mulder, M., Timmers-Raaijmakers, B., Ratsma, K., Dooijes, D., van Haelst, M. M. &lt;strong&gt;Nemaline myopathy caused by TNNT1 mutations in a Dutch pedigree.&lt;/strong&gt; Molec. Genet. Genomic Med. 2: 134-137, 2014.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/24689076/&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;24689076&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=24689076[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/10.1002/mgg3.52&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="24689076">van der Pol et al. (2014)</a> identified compound heterozygous mutations in the TNNT1 gene: a splice site mutation (<a href="/entry/191041#0002">191041.0002</a>) and an intragenic deletion (ex14del; <a href="/entry/191041#0003">191041.0003</a>). The mutations were inherited from the unaffected parents. Homozygosity for the splice site mutation was identified in 2 paternal cousins with a similar disorder who died in childhood of respiratory insufficiency. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=24689076" 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 3 unrelated patients with NEM5A, <a href="#2" class="mim-tip-reference" title="Geraud, J., Dieterich, K., Rendu, J., Uro Coste, E., Dobrzynski, M., Marcorelle, P., Ioos, C., Romero, N. B., Baudou, E., Brocard, J., Coville, A.-C., Faure, J., and 10 others. &lt;strong&gt;Clinical phenotype and loss of the slow skeletal muscle troponin T in three new patients with recessive TNNT1 nemaline myopathy.&lt;/strong&gt; J. Med. Genet. 58: 602-608, 2021.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/32994279/&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;32994279&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=32994279[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/10.1136/jmedgenet-2019-106714&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="32994279">Geraud et al. (2021)</a> identified homozygous or compound heterozygous mutations in the TNNT1 gene (see, e.g., <a href="/entry/191041#0004">191041.0004</a>-<a href="/entry/191041#0006">191041.0006</a>). Western blot analysis of skeletal muscle from the patients showed absence of the TNNT1 protein. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=32994279" 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>Population Genetics</strong>
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<p><a href="#3" class="mim-tip-reference" title="Johnston, J. J., Kelley, R. I., Crawford, T. O., Morton, D. H., Agarwala, R., Koch, T., Schaffer, A. A., Francomano, C. A., Biesecker, L. G. &lt;strong&gt;A novel nemaline myopathy in the Amish caused by a mutation in troponin T1.&lt;/strong&gt; Am. J. Hum. Genet. 67: 814-821, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10952871/&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;10952871&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=10952871[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/10.1086/303089&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="10952871">Johnston et al. (2000)</a> estimated that NEM5A has an incidence of 1 in 500 among the Amish. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10952871" 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="Fox2018" class="mim-anchor"></a>
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Fox, M. D., Carson, V. J., Feng, H.-Z., Lawlor, M. W., Gray, J. T., Brigatti, K. W., Jin, J.-P., Strauss, K. A.
<strong>TNNT1 nemaline myopathy: natural history and therapeutic frontier.</strong>
Hum. Molec. Genet. 27: 3272-3282, 2018.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/29931346/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">29931346</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=29931346[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=29931346" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1093/hmg/ddy233" target="_blank">Full Text</a>]
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Geraud, J., Dieterich, K., Rendu, J., Uro Coste, E., Dobrzynski, M., Marcorelle, P., Ioos, C., Romero, N. B., Baudou, E., Brocard, J., Coville, A.-C., Faure, J., and 10 others.
<strong>Clinical phenotype and loss of the slow skeletal muscle troponin T in three new patients with recessive TNNT1 nemaline myopathy.</strong>
J. Med. Genet. 58: 602-608, 2021.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/32994279/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">32994279</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=32994279[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=32994279" 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/jmedgenet-2019-106714" target="_blank">Full Text</a>]
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Johnston, J. J., Kelley, R. I., Crawford, T. O., Morton, D. H., Agarwala, R., Koch, T., Schaffer, A. A., Francomano, C. A., Biesecker, L. G.
<strong>A novel nemaline myopathy in the Amish caused by a mutation in troponin T1.</strong>
Am. J. Hum. Genet. 67: 814-821, 2000.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10952871/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10952871</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=10952871[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=10952871" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1086/303089" target="_blank">Full Text</a>]
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van der Pol, W. L., Leijenaar, J. F., Spliet, W. G. M., Lavrijsen, S. W., Jansen, N. J. G., Braun, K. P. J., Mulder, M., Timmers-Raaijmakers, B., Ratsma, K., Dooijes, D., van Haelst, M. M.
<strong>Nemaline myopathy caused by TNNT1 mutations in a Dutch pedigree.</strong>
Molec. Genet. Genomic Med. 2: 134-137, 2014.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/24689076/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">24689076</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=24689076[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=24689076" 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/mgg3.52" target="_blank">Full Text</a>]
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Cassandra L. Kniffin - updated : 05/22/2023
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Hilary J. Vernon - updated : 11/18/2020
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Victor A. McKusick : 10/20/2000
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alopez : 05/31/2023
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alopez : 05/30/2023<br>ckniffin : 05/22/2023<br>carol : 11/18/2020<br>carol : 01/22/2019<br>carol : 08/02/2013<br>alopez : 1/5/2007<br>carol : 4/7/2005<br>ckniffin : 4/4/2005<br>carol : 10/24/2000
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<h3>
<span class="mim-font">
<strong>#</strong> 605355
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NEMALINE MYOPATHY 5A, AUTOSOMAL RECESSIVE, SEVERE INFANTILE; NEM5A
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<em>Alternative titles; symbols</em>
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NEMALINE MYOPATHY, AMISH TYPE; ANM<br />
AMISH NEMALINE MYOPATHY
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<strong>SNOMEDCT:</strong> 1197155007; &nbsp;
<strong>ORPHA:</strong> 98902; &nbsp;
<strong>DO:</strong> 0110936; &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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19q13.42
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Nemaline myopathy 5A, autosomal recessive, severe infantile
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605355
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Autosomal recessive
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3
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TNNT1
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191041
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because of evidence that autosomal recessive severe infantile nemaline myopathy-5A (NEM5A), also known as Amish nemaline myopathy, is caused by homozygous or compound heterozygous mutation in the gene encoding troponin T1 (TNNT1; 191041) on chromosome 19q13.</p>
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<strong>Description</strong>
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<p>Autosomal recessive severe infantile nemaline myopathy-5A (NEM5A) is a skeletal muscle disorder characterized by symptom onset soon after birth or in early infancy. Affected infants show axial hypotonia, stiffness, rigid spine with progressive kyphosis, pectus deformities, and contractures or limited movement of the large joints. Some patients show transient tremors. There is muscle atrophy and poor gross motor development. Respiratory insufficiency develops in the first years of life, often leading to death. Muscle biopsy shows nemaline rods (Johnston et al., 2000; Geraud et al., 2021). </p><p>For a discussion of genetic heterogeneity of nemaline myopathy, see NEM2 (256030).</p>
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<strong>Clinical Features</strong>
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<p>Between 1988 and 2000, Johnston et al. (2000) treated or obtained clinical information on 71 infants and young children from 33 nuclear families with an apparently unique form of nemaline myopathy. Since the disorder occurred among the Old Order Amish of Lancaster County, Pennsylvania, the authors referred to the autosomal recessive disorder as Amish nemaline myopathy (ANM). All neonates with ANM had tremors that were evident at birth or within a few days of birth and involved most skeletal muscle groups, especially the muscles of the jaw and lower limbs. These tremors subsided over the first 2 to 3 months of life. Mild proximal contractures present at birth gradually worsened with age, such that hip abduction was often limited to 10 degrees or less by age 12 months. Progressive muscle atrophy and weakness developed simultaneously with the contractures. Gross motor development was limited to rolling side to side, but forearm and hand function was normal, as was apparent intelligence. The characteristic severe pectus carinatum deformity, with rigidity of the chest wall, developed along with the proximal contractures. The authors suspected that tremors both in utero and for several weeks after birth might be a carrier manifestation: several sibs of affected individuals with normal outcomes had had abnormal trembling both in utero and for several weeks after birth. Neurologic examinations and, in one case, tests for hypoglycemia and hypocalcemia, were normal in these sibs. The disorder showed progressive worsening, resulting in death from respiratory insufficiency, usually in the second year of life. </p><p>Fox et al. (2018) described the natural history of ANM in 106 patients of Amish ancestry who were born between 1923 and 2017. In 18 patients for whom detailed developmental history was documented, birthweight was normal but 94% had growth failure by 9 months of age. Eleven patients rolled from supine to prone, but all subsequently lost this skill, and only 2 sat independently. Abnormalities in the neonatal period included axial hypotonia, limb and chin tremors, and sustained provoked clonus. The tremors subsided in the first few months as contractures developed. Muscle atrophy and weakness progressed with the development of contractures, and the patients developed pectus carinatum. Patients had recurrent upper and lower respiratory tract infections. Management was palliative in all of the patients, and there was no correlation between date of birth and length of survival. Among 82 patients for whom the data were available, median survival was 18 months with a range of 0.2 to 66 months. Fox et al. (2018) examined skeletal muscle from 2 patients with AMN, which showed absent TNNT1, decreased slow skeletal TNNI1 (191042), and increased cardiac TNNT2 (191045). Histologic findings included abnormalities of myofiber size, increased numbers of internally nucleated fibers, and nemaline rods. </p><p>Van der Pol et al. (2014) reported 3 patients from a large Dutch family with NEM5A. The proband presented at 2 months of age with stiffness, rigid spine, reduced cervical motion, and limited movements of the shoulders, hips, and knees. Reflexes were absent and tremors were not noted. Other features included kyphosis and pectus carinatum. By age 2 years, he developed respiratory insufficiency and feeding difficulties as well as diaphragmatic hernia, requiring surgery, tracheostomy, and gastrostomy. Family history revealed 2 paternal cousins who died at 3 and 5 years of age, respectively, due to respiratory insufficiency. They had severe hypotonia, joint contractures, pectus carinatum, and kyphosis. Muscle biopsy of the proband showed nemaline myopathy. </p><p>Geraud et al. (2021) reported 3 unrelated patients with NEM5A resulting in death from respiratory failure between 6 and 29 months of age. The patients had axial and peripheral hypotonia, delayed motor development, hyporeflexia, and progressive respiratory insufficiency. The older patients showed progressive kyphosis with rigid spine, limited hip and knee movement, and pectus deformities. Additional variable features included tongue fasciculations, tremor, torticollis, diaphragmatic palsy, facial hypomimia, high palate, and failure to thrive. Skeletal muscle biopsy showed fiber size variation, rods, and sarcomeric disorganization; endomysial fibrosis was sometimes seen. </p>
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<strong>Inheritance</strong>
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<p>The transmission pattern of NEM5A in the families reported by Johnston et al. (2000) was consistent with autosomal recessive inheritance. </p>
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<strong>Mapping</strong>
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<p>Using a genealogy database, automated pedigree software, and linkage analysis of DNA samples from 4 sibships segregating Amish nemaline myopathy, Johnston et al. (2000) identified an interval of approximately 2 cM on 19q13.4 that was homozygous in all affected individuals. </p>
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<strong>Molecular Genetics</strong>
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<p>Because the TNNT1 gene mapped within the candidate region on chromosome 19q13 for nemaline myopathy, Johnston et al. (2000) sequenced the gene in Amish patients with the disorder and identified homozygosity for a nonsense mutation (E180X; 191041.0001). </p><p>In a Dutch boy with NEM5A, van der Pol et al. (2014) identified compound heterozygous mutations in the TNNT1 gene: a splice site mutation (191041.0002) and an intragenic deletion (ex14del; 191041.0003). The mutations were inherited from the unaffected parents. Homozygosity for the splice site mutation was identified in 2 paternal cousins with a similar disorder who died in childhood of respiratory insufficiency. </p><p>In 3 unrelated patients with NEM5A, Geraud et al. (2021) identified homozygous or compound heterozygous mutations in the TNNT1 gene (see, e.g., 191041.0004-191041.0006). Western blot analysis of skeletal muscle from the patients showed absence of the TNNT1 protein. </p>
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<strong>Population Genetics</strong>
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<p>Johnston et al. (2000) estimated that NEM5A has an incidence of 1 in 500 among the Amish. </p>
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<strong>REFERENCES</strong>
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<p class="mim-text-font">
Fox, M. D., Carson, V. J., Feng, H.-Z., Lawlor, M. W., Gray, J. T., Brigatti, K. W., Jin, J.-P., Strauss, K. A.
<strong>TNNT1 nemaline myopathy: natural history and therapeutic frontier.</strong>
Hum. Molec. Genet. 27: 3272-3282, 2018.
[PubMed: 29931346]
[Full Text: https://doi.org/10.1093/hmg/ddy233]
</p>
</li>
<li>
<p class="mim-text-font">
Geraud, J., Dieterich, K., Rendu, J., Uro Coste, E., Dobrzynski, M., Marcorelle, P., Ioos, C., Romero, N. B., Baudou, E., Brocard, J., Coville, A.-C., Faure, J., and 10 others.
<strong>Clinical phenotype and loss of the slow skeletal muscle troponin T in three new patients with recessive TNNT1 nemaline myopathy.</strong>
J. Med. Genet. 58: 602-608, 2021.
[PubMed: 32994279]
[Full Text: https://doi.org/10.1136/jmedgenet-2019-106714]
</p>
</li>
<li>
<p class="mim-text-font">
Johnston, J. J., Kelley, R. I., Crawford, T. O., Morton, D. H., Agarwala, R., Koch, T., Schaffer, A. A., Francomano, C. A., Biesecker, L. G.
<strong>A novel nemaline myopathy in the Amish caused by a mutation in troponin T1.</strong>
Am. J. Hum. Genet. 67: 814-821, 2000.
[PubMed: 10952871]
[Full Text: https://doi.org/10.1086/303089]
</p>
</li>
<li>
<p class="mim-text-font">
van der Pol, W. L., Leijenaar, J. F., Spliet, W. G. M., Lavrijsen, S. W., Jansen, N. J. G., Braun, K. P. J., Mulder, M., Timmers-Raaijmakers, B., Ratsma, K., Dooijes, D., van Haelst, M. M.
<strong>Nemaline myopathy caused by TNNT1 mutations in a Dutch pedigree.</strong>
Molec. Genet. Genomic Med. 2: 134-137, 2014.
[PubMed: 24689076]
[Full Text: https://doi.org/10.1002/mgg3.52]
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Cassandra L. Kniffin - updated : 05/22/2023<br>Hilary J. Vernon - updated : 11/18/2020
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Victor A. McKusick : 10/20/2000
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alopez : 05/31/2023<br>alopez : 05/30/2023<br>ckniffin : 05/22/2023<br>carol : 11/18/2020<br>carol : 01/22/2019<br>carol : 08/02/2013<br>alopez : 1/5/2007<br>carol : 4/7/2005<br>ckniffin : 4/4/2005<br>carol : 10/24/2000
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