nih-gov/www.ncbi.nlm.nih.gov/omim/600972

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<title>
Entry
- #600972 - ACHONDROGENESIS, TYPE IB; ACG1B
- OMIM
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<span class="h4">#600972</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/600972"><strong>Clinical Synopsis</strong></a>
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<a href="/phenotypicSeries/PS200600"> <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="#diagnosis">Diagnosis</a>
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<a href="#molecularGenetics">Molecular Genetics</a>
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<a href="#references"><strong>References</strong></a>
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<a href="#contributors"><strong>Contributors</strong></a>
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<a href="#creationDate"><strong>Creation Date</strong></a>
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<div><a href="https://clinicaltrials.gov/search?cond=ACHONDROGENESIS, TYPE IB" class="mim-tip-hint" title="A registry of federally and privately supported clinical trials conducted in the United States and around the world." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Clinical Trials', 'domain': 'clinicaltrials.gov'})">Clinical Trials</a></div>
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<div style="margin-left: 0.5em;"><a href="https://www.orpha.net/consor/cgi-bin/ClinicalLabs_Search_Simple.php?lng=EN&LnkId=12235&Typ=Pat" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'EuroGentest', 'domain': 'orpha.net'})">Achondrogenesis type 1B&nbsp;</a></div><div style="margin-left: 0.5em;"><a href="https://www.orpha.net/consor/cgi-bin/ClinicalLabs_Search_Simple.php?lng=EN&LnkId=1256&Typ=Pat" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'EuroGentest', 'domain': 'orpha.net'})">Achondrogenesis&nbsp;</a></div>
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<div class="panel panel-default" style="margin-top: 0px; border-radius: 0px">
<div class="panel-heading mim-panel-heading" role="tab" id="mimAnimalModels">
<span class="panel-title">
<span class="small">
<a href="#mimAnimalModelsLinksFold" id="mimAnimalModelsLinksToggle" class="collapsed mimSingletonTriangleToggle" role="button" data-toggle="collapse" data-parent="#mimExternalLinksAccordion">
<div style="display: table-row">
<div id="mimAnimalModelsLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5; display: table-cell;">&#9658;</div>
&nbsp;
<div style="display: table-cell;">Animal Models</div>
</div>
</a>
</span>
</span>
</div>
<div id="mimAnimalModelsLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel">
<div class="panel-body small mim-panel-body">
<div><a href="https://www.alliancegenome.org/disease/DOID:0080055" 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/600972" 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/OMIA001315/" 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:0080055" 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>
</div>
</div>
</div>
</div>
</div>
</div>
<span>
<span class="mim-tip-bottom" qtip_title="<strong>Looking for this gene or this phenotype in other resources?</strong>" qtip_text="Select a related resource from the dropdown menu and click for a targeted link to information directly relevant.">
&nbsp;
</span>
</span>
</div>
<div class="col-lg-8 col-lg-pull-2 col-md-8 col-md-pull-2 col-sm-8 col-sm-pull-2 col-xs-12">
<div>
<a id="title" class="mim-anchor"></a>
<div>
<a id="number" class="mim-anchor"></a>
<div class="text-right">
<a href="#" class="mim-tip-icd" qtip_title="<strong>ICD+</strong>" qtip_text="
<strong>SNOMEDCT:</strong> 14870002<br />
<strong>ORPHA:</strong> 93298, 932<br />
<strong>DO:</strong> 0080055<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>
600972
</span>
</span>
</div>
</div>
<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
ACHONDROGENESIS, TYPE IB; ACG1B
</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">
ACHONDROGENESIS, FRACCARO TYPE
</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/5/658?start=-3&limit=10&highlight=658">
5q32
</a>
</span>
</td>
<td>
<span class="mim-font">
Achondrogenesis Ib
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600972"> 600972 </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">
SLC26A2
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606718"> 606718 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="btn-group ">
<a href="/clinicalSynopsis/600972" class="btn btn-warning" role="button"> Clinical Synopsis </a>
<button type="button" id="mimPhenotypicSeriesToggle" class="btn btn-warning dropdown-toggle mimSingletonFoldToggle" data-toggle="collapse" href="#mimClinicalSynopsisFold" onclick="ga('send', 'event', 'Unfurl', 'ClinicalSynopsis', 'omim.org')">
<span class="caret"></span>
<span class="sr-only">Toggle Dropdown</span>
</button>
</div>
&nbsp;
<div class="btn-group">
<a href="/phenotypicSeries/PS200600" 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')">
<span class="caret"></span>
<span class="sr-only">Toggle Dropdown</span>
</button>
</div>
&nbsp;
<div class="btn-group">
<button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
PheneGene Graphics <span class="caret"></span>
</button>
<ul class="dropdown-menu" style="width: 17em;">
<li><a href="/graph/linear/600972" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/600972" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Radial'})"> Radial </a></li>
</ul>
</div>
<span class="glyphicon glyphicon-question-sign mim-tip-hint" title="OMIM PheneGene graphics depict relationships between phenotypes, groups of related phenotypes (Phenotypic Series), and genes.<br /><a href='/static/omim/pdf/OMIM_Graphics.pdf' target='_blank'>A quick reference overview and guide (PDF)</a>"></span>
<div>
<p />
</div>
<div id="mimClinicalSynopsisFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small" style="margin: 5px">
<div>
<div>
<span class="h5 mim-font">
<strong> INHERITANCE </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Autosomal recessive <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/258211005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">258211005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0441748&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0441748</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> GROWTH </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Height </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Short-limbed dwarfism identifiable at birth <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1850171&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1850171</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0008921" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0008921</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0008921" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0008921</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Other </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Fetal hydrops <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/276508000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">276508000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/P83.2" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">P83.2</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0020305&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0020305</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001789" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001789</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> HEAD & NECK </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Head </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Flat face <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1853241&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1853241</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0012368" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0012368</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0012368" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0012368</a>]</span> <a href="https://elementsofmorphology.nih.gov/index.cgi?tid=9ba328482ffd2d39f0d1071965725b03" target="_blank" class="small mim-tip-eom" title="&lt;img src=&quot;https://elementsofmorphology.nih.gov/images/terms/Face,Flat-small.jpg&quot;&gt; &lt;br/&gt;Further Information: &lt;a href=&quot;https://elementsofmorphology.nih.gov/index.cgi?tid=9ba328482ffd2d39f0d1071965725b03&quot target=&quot;_blank&quot onclick=&quot;gtag(\'event\', \'mim_outbound\', {\'name\': \'EOM\', \'domain\': \'elementsofmorphology.nih.gov\'})&quot;&gt;Elements of Morphology&lt;/a&gt;"><span class="glyphicon glyphicon-user" aria-hidden="true"></span></a><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> RESPIRATORY </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Lung </em>
</span>
</div>
<div style="margin-left: 2em;">
<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 />
</span>
</div>
</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">
- Narrow chest <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/249671009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">249671009</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0426790&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0426790</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000774" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000774</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000774" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000774</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">
- Thin short ribs <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1849071&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1849071</a>]</span><br /> -
Occasional rib fractures <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832979&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832979</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> ABDOMEN </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> External Features </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Umbilical hernia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/396347007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">396347007</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/K42" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">K42</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/K42.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">K42.9</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/553.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">553.1</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0019322&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0019322</a>, <a href="https://bioportal.bioontology.org/search?q=C0041636&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0041636</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001537" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001537</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001537" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001537</a>]</span><br /> -
Inguinal herniae <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/396232000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">396232000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/K40" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">K40</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/K40.90" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">K40.90</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/550" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">550</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0019294&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0019294</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000023" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000023</a>]</span><br /> -
Distended abdomen <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/60728008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">60728008</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0000731&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0000731</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003270" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003270</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003270" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003270</a>]</span><br />
</span>
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<div>
<span class="h5 mim-font">
<strong> SKELETAL </strong>
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<div style="margin-left: 2em;">
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<span class="h5 mim-font">
<em> Skull </em>
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<div style="margin-left: 2em;">
<span class="mim-font">
- Slightly less ossified than expected for gestational age <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832982&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832982</a>]</span><br />
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<div>
<span class="h5 mim-font">
<em> Spine </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Absent or minimally ossified vertebral bodies <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832983&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832983</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0004599" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0004599</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0004599" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0004599</a>]</span><br />
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<span class="h5 mim-font">
<em> Pelvis </em>
</span>
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<div style="margin-left: 2em;">
<span class="mim-font">
- Small iliac bones <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1861218&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1861218</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000946" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000946</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000946" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000946</a>]</span><br /> -
Unossified ischium and pubis <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832985&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832985</a>]</span><br />
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<span class="h5 mim-font">
<em> Limbs </em>
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<div style="margin-left: 2em;">
<span class="mim-font">
- Severe micromelia <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832986&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832986</a>]</span> <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/74370006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">74370006</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002983" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002983</a>]</span><br /> -
Marked shortness, broad tubular bone <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832987&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832987</a>]</span><br /> -
Metaphyseal spurring <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832988&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832988</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0005054" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0005054</a>]</span><br />
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<div>
<span class="h5 mim-font">
<strong> PRENATAL MANIFESTATIONS </strong>
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<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Amniotic Fluid </em>
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<div style="margin-left: 2em;">
<span class="mim-font">
- Polyhydramnios <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/86203003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">86203003</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/O40" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">O40</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/657.0" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">657.0</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/657" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">657</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0020224&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0020224</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001561" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001561</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001561" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001561</a>]</span><br />
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<span class="h5 mim-font">
<em> Delivery </em>
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<div style="margin-left: 2em;">
<span class="mim-font">
- Breech presentation at birth <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/249101006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">249101006</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/6096002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">6096002</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0006157&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0006157</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001623" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001623</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001623" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001623</a>]</span><br /> -
Often stillborn <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832981&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832981</a>]</span><br />
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<div>
<span class="h5 mim-font">
<strong> LABORATORY ABNORMALITIES </strong>
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<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- No cartilage staining with toluidine blue <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832989&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832989</a>]</span><br /> -
Impaired synthesis of fibroblast sulfated proteoglycans <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832990&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832990</a>]</span><br />
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<span class="h5 mim-font">
<strong> MOLECULAR BASIS </strong>
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<div style="margin-left: 2em;">
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<span class="mim-font">
- Caused by mutation in the solute carrier family 26 (sulfate transporter), member 2 gene (SLC26A2, <a href="/entry/606718#0005">606718.0005</a>)<br />
</span>
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<h5>
Achondrogenesis
- <a href="/phenotypicSeries/PS200600">PS200600</a>
- 3 Entries
</h5>
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<strong>Location</strong>
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<strong>Phenotype</strong>
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<strong>Inheritance</strong>
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<strong>Phenotype<br />mapping key</strong>
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<strong>Phenotype<br />MIM number</strong>
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<strong>Gene/Locus</strong>
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<strong>Gene/Locus<br />MIM number</strong>
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<td>
<span class="mim-font">
<a href="/geneMap/5/658?start=-3&limit=10&highlight=658"> 5q32 </a>
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<span class="mim-font">
<a href="/entry/600972"> Achondrogenesis Ib </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/600972"> 600972 </a>
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<td>
<span class="mim-font">
<a href="/entry/606718"> SLC26A2 </a>
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<td>
<span class="mim-font">
<a href="/entry/606718"> 606718 </a>
</span>
</td>
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<td>
<span class="mim-font">
<a href="/geneMap/12/325?start=-3&limit=10&highlight=325"> 12q13.11 </a>
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</td>
<td>
<span class="mim-font">
<a href="/entry/200610"> Achondrogenesis, type II or hypochondrogenesis </a>
</span>
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<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
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<td>
<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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<td>
<span class="mim-font">
<a href="/entry/200610"> 200610 </a>
</span>
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<span class="mim-font">
<a href="/entry/120140"> COL2A1 </a>
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<span class="mim-font">
<a href="/entry/120140"> 120140 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/14/465?start=-3&limit=10&highlight=465"> 14q32.12 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/200600"> Achondrogenesis, type IA </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>
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<td>
<span class="mim-font">
<a href="/entry/200600"> 200600 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604505"> TRIP11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604505"> 604505 </a>
</span>
</td>
</tr>
</tbody>
</table>
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<p>A number sign (#) is used with this entry because of evidence that achondrogenesis type IB (ACG1B) is caused by homozygous or compound heterozygous mutation in the DTDST gene (<a href="/entry/606718">606718</a>) on chromosome 5q32.</p>
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<strong>Description</strong>
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<p>The term achondrogenesis has been used to characterize the most severe forms of chondrodysplasia in humans, invariably lethal before or shortly after birth. Achondrogenesis type I is a severe chondrodystrophy characterized radiographically by deficient ossification in the lumbar vertebrae and absent ossification in the sacral, pubic and ischial bones and clinically by stillbirth or early death (<a href="#6" class="mim-tip-reference" title="Maroteaux, P., Lamy, M. &lt;strong&gt;Le diagnostic des nanismes chondro-dystrophiques chez les nouveau-nes.&lt;/strong&gt; Arch. Franc. Pediat. 25: 241-262, 1968.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/4970273/&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;4970273&lt;/a&gt;]" pmid="4970273">Maroteaux and Lamy, 1968</a>; <a href="#5" class="mim-tip-reference" title="Langer, L. O., Jr., Spranger, J. W., Greinacher, I., Herdman, R. C. &lt;strong&gt;Thanatophoric dwarfism: a condition confused with achondroplasia in the neonate, with brief comments on achondrogenesis and homozygous achondroplasia.&lt;/strong&gt; Radiology 92: 285-294, 1969.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/4885523/&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;4885523&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1148/92.2.285&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="4885523">Langer et al., 1969</a>). In addition to severe micromelia, there is a disproportionately large cranium due to marked edema of soft tissues. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=4885523+4970273" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Classification of Achondrogenesis</em></strong></p><p>
Achondrogenesis was traditionally divided into 2 types: type I (Parenti-Fraccaro) and type II (Langer-Saldino). <a href="#1" class="mim-tip-reference" title="Borochowitz, Z., Lachman, R., Adomian, G. E., Spear, G., Jones, K., Rimoin, D. L. &lt;strong&gt;Achondrogenesis type I: delineation of further heterogeneity and identification of two distinct subgroups.&lt;/strong&gt; J. Pediat. 112: 23-31, 1988.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/3275766/&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;3275766&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0022-3476(88)80113-6&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="3275766">Borochowitz et al. (1988)</a> suggested that achondrogenesis type I of Parenti-Fraccaro should be classified into 2 distinct disorders: type IA (ACG1A; <a href="/entry/200600">200600</a>), corresponding to the cases originally published by <a href="#4" class="mim-tip-reference" title="Houston, C. S., Awen, C. F., Kent, H. P. &lt;strong&gt;Fatal neonatal dwarfism.&lt;/strong&gt; J. Canad. Assoc. Radiol. 23: 45-61, 1972.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/5063132/&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;5063132&lt;/a&gt;]" pmid="5063132">Houston et al. (1972)</a> and <a href="#3" class="mim-tip-reference" title="Harris, R., Patton, J. T., Barson, A. J. &lt;strong&gt;Pseudo-achondrogenesis with fractures.&lt;/strong&gt; Clin. Genet. 3: 435-441, 1972.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/4568361/&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;4568361&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1111/j.1399-0004.1972.tb01477.x&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="4568361">Harris et al. (1972)</a>, and type IB, corresponding to the case originally published by <a href="#2" class="mim-tip-reference" title="Fraccaro, M. &lt;strong&gt;Contributo allo studio delle malattie del mesenchima osteopoietico: l&#x27;acondrogenesi.&lt;/strong&gt; Folia Hered. Path. 1: 190-208, 1952."None>Fraccaro (1952)</a>. Analysis of the case reported by <a href="#8" class="mim-tip-reference" title="Parenti, G. C. &lt;strong&gt;La anosteogenesi (una varieta della osteogenesi imperfetta).&lt;/strong&gt; Pathologica 28: 447-462, 1936."None>Parenti (1936)</a> by <a href="#1" class="mim-tip-reference" title="Borochowitz, Z., Lachman, R., Adomian, G. E., Spear, G., Jones, K., Rimoin, D. L. &lt;strong&gt;Achondrogenesis type I: delineation of further heterogeneity and identification of two distinct subgroups.&lt;/strong&gt; J. Pediat. 112: 23-31, 1988.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/3275766/&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;3275766&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0022-3476(88)80113-6&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="3275766">Borochowitz et al. (1988)</a> suggested the diagnosis of achondrogenesis type II, i.e., the Langer-Saldino type (<a href="/entry/200610">200610</a>). Type IA would be classified as lethal achondrogenesis, Houston-Harris type; type IB, lethal achondrogenesis, Fraccaro type; and type II, lethal achondrogenesis-hypochondrogenesis, Langer-Saldino type. <a href="#12" class="mim-tip-reference" title="Superti-Furga, A. &lt;strong&gt;Achondrogenesis type 1B.&lt;/strong&gt; J. Med. Genet. 33: 957-961, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8950678/&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;8950678&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1136/jmg.33.11.957&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="8950678">Superti-Furga (1996)</a> suggested that hypochondrogenesis should be considered separately from achondrogenesis type II because the phenotype can be much milder. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=3275766+4568361+8950678+5063132" 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>In a patient considered to have achondrogenesis type IB, <a href="#11" class="mim-tip-reference" title="Superti-Furga, A. &lt;strong&gt;A defect in the metabolic activation of sulfate in a patient with achondrogenesis type IB.&lt;/strong&gt; Am. J. Hum. Genet. 55: 1137-1145, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7977372/&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;7977372&lt;/a&gt;]" pmid="7977372">Superti-Furga (1994)</a> found that cartilage extracts showed a reduced content of proteoglycans and that unlike control cartilage they did not stain with toluidine blue and did not bind to DEAE. Impaired synthesis of sulfated proteoglycans was observed in fibroblast cultures from the patient. Radioactive labeling and immunoprecipitation studies indicated that core protein and side chains of proteoglycans were synthesized normally but were not sulfated. Analysis of sulfate metabolism in cultured fibroblasts in the patient's cells showed normal intracellular levels of free sulfate but markedly reduced levels of the 2 intermediate compounds in the sulfate activation pathway, adenosine-phosphosulfate and phosphoadenosine-phosphosulfate. <a href="#11" class="mim-tip-reference" title="Superti-Furga, A. &lt;strong&gt;A defect in the metabolic activation of sulfate in a patient with achondrogenesis type IB.&lt;/strong&gt; Am. J. Hum. Genet. 55: 1137-1145, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7977372/&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;7977372&lt;/a&gt;]" pmid="7977372">Superti-Furga (1994)</a> suggested that the results can be explained by deficient activity of one of the enzymes responsible for the biologic activation of sulfate, possibly similar to that observed in cartilage (but not in skin) of the recessive, nonlethal mouse mutant 'brachymorphic' and leading to defective sulfation of macromolecules (<a href="#7" class="mim-tip-reference" title="Orkin, R. W., Pratt, R. M., Martin, G. R. &lt;strong&gt;Undersulfated chondroitin sulfate in the cartilage matrix of brachymorphic mice.&lt;/strong&gt; Dev. Biol. 50: 82-94, 1976.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/1269836/&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;1269836&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/0012-1606(76)90069-5&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="1269836">Orkin et al., 1976</a>; <a href="#10" class="mim-tip-reference" title="Sugahara, K., Schwartz, N. B. &lt;strong&gt;Defect in 3-prime-phosphoadenosine 5-prime-phosphosulfate formation in brachymorphic mice.&lt;/strong&gt; Proc. Nat. Acad. Sci. 76: 6615-6618, 1979.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/230515/&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;230515&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1073/pnas.76.12.6615&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="230515">Sugahara and Schwartz, 1979</a>; <a href="#9" class="mim-tip-reference" title="Sugahara, K., Schwartz, N. B. &lt;strong&gt;Defect in 3-prime-phosphoadenosine 5-prime-phosphosulfate synthesis in brachymorphic mice. I. Characterization of the defect.&lt;/strong&gt; Arch. Biochem. Biophys. 214: 589-601, 1982.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/6284029/&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;6284029&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/0003-9861(82)90064-9&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="6284029">Sugahara and Schwartz, 1982</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?term=6284029+230515+7977372+1269836" 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="#13" class="mim-tip-reference" title="Superti-Furga, A., Hastbacka, J., Cohn, D. H., Wilcox, W., van der Harten, H. J., Rimoin, D. L., Lander, E. S., Steinmann, B., Gitzelmann, R. &lt;strong&gt;Defective sulfation of proteoglycans in achondrogenesis type IB is caused by mutations in the DTDST gene: the disorder is allelic to diastrophic dysplasia. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 57: A48, 1995."None>Superti-Furga et al. (1995)</a> identified a sulfation defect in tissues and/or cells of 5 other type IB patients.</p>
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<a id="diagnosis" class="mim-anchor"></a>
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<strong>Diagnosis</strong>
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<p><a href="#14" class="mim-tip-reference" title="Superti-Furga, A., Hastbacka, J., Wilcox, W. R., Cohn, D. H., van der Harten, H. J., Rossi, A., Blau, N., Rimoin, D. L., Steinmann, B., Lander, E. S., Gitzelmann, R. &lt;strong&gt;Achondrogenesis type IB is caused by mutations in the diastrophic dysplasia sulphate transporter gene.&lt;/strong&gt; Nature Genet. 12: 100-102, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8528239/&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;8528239&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng0196-100&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="8528239">Superti-Furga et al. (1996)</a> observed that elucidation of the basic defect in ACG1B allows diagnosis by biochemical and molecular studies. They emphasized that accurate genetic counseling, particularly the distinction between ACG1B (which has a 25% recurrence risk) and the more frequent, autosomal dominant condition ACG2 (which usually involves the occurrence of new mutations and has a much lower recurrence risk), will be improved, and heterozygous carriers can be more readily detected. Couples at risk for having a child with ACG1B may decide to take advantage of molecular prenatal diagnosis by chorionic villus sampling, which can be done earlier than ultrasonographic diagnosis. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8528239" 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="molecularGenetics" class="mim-anchor"></a>
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<strong>Molecular Genetics</strong>
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<p>In 6 patients with ACG1B, <a href="#14" class="mim-tip-reference" title="Superti-Furga, A., Hastbacka, J., Wilcox, W. R., Cohn, D. H., van der Harten, H. J., Rossi, A., Blau, N., Rimoin, D. L., Steinmann, B., Lander, E. S., Gitzelmann, R. &lt;strong&gt;Achondrogenesis type IB is caused by mutations in the diastrophic dysplasia sulphate transporter gene.&lt;/strong&gt; Nature Genet. 12: 100-102, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8528239/&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;8528239&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng0196-100&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="8528239">Superti-Furga et al. (1996)</a> identified 7 different, putatively pathogenic, homozygous or compound heterozygous mutations in the DTDST gene (see, e.g., <a href="/entry/606718#0005">606718.0005</a> and <a href="/entry/606718#0006">606718.0006</a>). The mutations were identified by genomic PCR, SSCP, and direct sequencing. One of the mutations (<a href="/entry/606718#0001">606718.0001</a>) had previously been identified in patients with diastrophic dysplasia (<a href="/entry/222600">222600</a>). Thus, achondrogenesis type IB is a recessive disorder allelic to diastrophic dysplasia. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8528239" 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="references"class="mim-anchor"></a>
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<strong>REFERENCES</strong>
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<a id="1" class="mim-anchor"></a>
<a id="Borochowitz1988" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Borochowitz, Z., Lachman, R., Adomian, G. E., Spear, G., Jones, K., Rimoin, D. L.
<strong>Achondrogenesis type I: delineation of further heterogeneity and identification of two distinct subgroups.</strong>
J. Pediat. 112: 23-31, 1988.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/3275766/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">3275766</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=3275766" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/s0022-3476(88)80113-6" target="_blank">Full Text</a>]
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<a id="2" class="mim-anchor"></a>
<a id="Fraccaro1952" class="mim-anchor"></a>
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Fraccaro, M.
<strong>Contributo allo studio delle malattie del mesenchima osteopoietico: l'acondrogenesi.</strong>
Folia Hered. Path. 1: 190-208, 1952.
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<a id="3" class="mim-anchor"></a>
<a id="Harris1972" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Harris, R., Patton, J. T., Barson, A. J.
<strong>Pseudo-achondrogenesis with fractures.</strong>
Clin. Genet. 3: 435-441, 1972.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/4568361/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">4568361</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=4568361" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1111/j.1399-0004.1972.tb01477.x" target="_blank">Full Text</a>]
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<a id="Houston1972" class="mim-anchor"></a>
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<p class="mim-text-font">
Houston, C. S., Awen, C. F., Kent, H. P.
<strong>Fatal neonatal dwarfism.</strong>
J. Canad. Assoc. Radiol. 23: 45-61, 1972.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/5063132/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">5063132</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=5063132" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
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<a id="Langer1969" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Langer, L. O., Jr., Spranger, J. W., Greinacher, I., Herdman, R. C.
<strong>Thanatophoric dwarfism: a condition confused with achondroplasia in the neonate, with brief comments on achondrogenesis and homozygous achondroplasia.</strong>
Radiology 92: 285-294, 1969.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/4885523/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">4885523</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=4885523" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1148/92.2.285" target="_blank">Full Text</a>]
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<a id="6" class="mim-anchor"></a>
<a id="Maroteaux1968" class="mim-anchor"></a>
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<p class="mim-text-font">
Maroteaux, P., Lamy, M.
<strong>Le diagnostic des nanismes chondro-dystrophiques chez les nouveau-nes.</strong>
Arch. Franc. Pediat. 25: 241-262, 1968.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/4970273/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">4970273</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=4970273" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
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<a id="7" class="mim-anchor"></a>
<a id="Orkin1976" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Orkin, R. W., Pratt, R. M., Martin, G. R.
<strong>Undersulfated chondroitin sulfate in the cartilage matrix of brachymorphic mice.</strong>
Dev. Biol. 50: 82-94, 1976.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/1269836/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">1269836</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1269836" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/0012-1606(76)90069-5" target="_blank">Full Text</a>]
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<a id="8" class="mim-anchor"></a>
<a id="Parenti1936" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Parenti, G. C.
<strong>La anosteogenesi (una varieta della osteogenesi imperfetta).</strong>
Pathologica 28: 447-462, 1936.
</p>
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<a id="9" class="mim-anchor"></a>
<a id="Sugahara1982" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Sugahara, K., Schwartz, N. B.
<strong>Defect in 3-prime-phosphoadenosine 5-prime-phosphosulfate synthesis in brachymorphic mice. I. Characterization of the defect.</strong>
Arch. Biochem. Biophys. 214: 589-601, 1982.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/6284029/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">6284029</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=6284029" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/0003-9861(82)90064-9" target="_blank">Full Text</a>]
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<a id="Sugahara1979" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Sugahara, K., Schwartz, N. B.
<strong>Defect in 3-prime-phosphoadenosine 5-prime-phosphosulfate formation in brachymorphic mice.</strong>
Proc. Nat. Acad. Sci. 76: 6615-6618, 1979.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/230515/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">230515</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=230515" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1073/pnas.76.12.6615" target="_blank">Full Text</a>]
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<a id="Superti-Furga1994" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Superti-Furga, A.
<strong>A defect in the metabolic activation of sulfate in a patient with achondrogenesis type IB.</strong>
Am. J. Hum. Genet. 55: 1137-1145, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7977372/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7977372</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7977372" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
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<a id="Superti-Furga1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Superti-Furga, A.
<strong>Achondrogenesis type 1B.</strong>
J. Med. Genet. 33: 957-961, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8950678/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8950678</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8950678" 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/jmg.33.11.957" target="_blank">Full Text</a>]
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<a id="Superti-Furga1995" class="mim-anchor"></a>
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Superti-Furga, A., Hastbacka, J., Cohn, D. H., Wilcox, W., van der Harten, H. J., Rimoin, D. L., Lander, E. S., Steinmann, B., Gitzelmann, R.
<strong>Defective sulfation of proteoglycans in achondrogenesis type IB is caused by mutations in the DTDST gene: the disorder is allelic to diastrophic dysplasia. (Abstract)</strong>
Am. J. Hum. Genet. 57: A48, 1995.
</p>
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<a id="Superti-Furga1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Superti-Furga, A., Hastbacka, J., Wilcox, W. R., Cohn, D. H., van der Harten, H. J., Rossi, A., Blau, N., Rimoin, D. L., Steinmann, B., Lander, E. S., Gitzelmann, R.
<strong>Achondrogenesis type IB is caused by mutations in the diastrophic dysplasia sulphate transporter gene.</strong>
Nature Genet. 12: 100-102, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8528239/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8528239</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8528239" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1038/ng0196-100" target="_blank">Full Text</a>]
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Marla J. F. O'Neill - updated : 1/22/2010
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Victor A. McKusick : 1/10/1996
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carol : 03/10/2015
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carol : 3/9/2015<br>wwang : 1/25/2010<br>terry : 1/22/2010<br>carol : 2/3/2009<br>carol : 2/27/2002<br>terry : 12/3/1996<br>mark : 9/26/1996<br>terry : 9/17/1996<br>mark : 3/4/1996<br>mark : 2/19/1996<br>terry : 2/15/1996<br>mark : 1/17/1996<br>mark : 1/10/1996
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<h3>
<span class="mim-font">
<strong>#</strong> 600972
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<span class="mim-font">
ACHONDROGENESIS, TYPE IB; ACG1B
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<span class="mim-font">
<em>Alternative titles; symbols</em>
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<h4>
<span class="mim-font">
ACHONDROGENESIS, FRACCARO TYPE
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<span class="mim-text-font">
<strong>SNOMEDCT:</strong> 14870002; &nbsp;
<strong>ORPHA:</strong> 93298, 932; &nbsp;
<strong>DO:</strong> 0080055; &nbsp;
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<h4>
<span class="mim-font">
<strong>Phenotype-Gene Relationships</strong>
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<table class="table table-bordered table-condensed small mim-table-padding">
<thead>
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<th>
Location
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<th>
Phenotype
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<th>
Phenotype <br /> MIM number
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Inheritance
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<th>
Phenotype <br /> mapping key
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Gene/Locus
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Gene/Locus <br /> MIM number
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</thead>
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<td>
<span class="mim-font">
5q32
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<span class="mim-font">
Achondrogenesis Ib
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<span class="mim-font">
600972
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Autosomal recessive
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<td>
<span class="mim-font">
3
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<span class="mim-font">
SLC26A2
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<span class="mim-font">
606718
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<span class="mim-font">
<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because of evidence that achondrogenesis type IB (ACG1B) is caused by homozygous or compound heterozygous mutation in the DTDST gene (606718) on chromosome 5q32.</p>
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<span class="mim-font">
<strong>Description</strong>
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<p>The term achondrogenesis has been used to characterize the most severe forms of chondrodysplasia in humans, invariably lethal before or shortly after birth. Achondrogenesis type I is a severe chondrodystrophy characterized radiographically by deficient ossification in the lumbar vertebrae and absent ossification in the sacral, pubic and ischial bones and clinically by stillbirth or early death (Maroteaux and Lamy, 1968; Langer et al., 1969). In addition to severe micromelia, there is a disproportionately large cranium due to marked edema of soft tissues. </p><p><strong><em>Classification of Achondrogenesis</em></strong></p><p>
Achondrogenesis was traditionally divided into 2 types: type I (Parenti-Fraccaro) and type II (Langer-Saldino). Borochowitz et al. (1988) suggested that achondrogenesis type I of Parenti-Fraccaro should be classified into 2 distinct disorders: type IA (ACG1A; 200600), corresponding to the cases originally published by Houston et al. (1972) and Harris et al. (1972), and type IB, corresponding to the case originally published by Fraccaro (1952). Analysis of the case reported by Parenti (1936) by Borochowitz et al. (1988) suggested the diagnosis of achondrogenesis type II, i.e., the Langer-Saldino type (200610). Type IA would be classified as lethal achondrogenesis, Houston-Harris type; type IB, lethal achondrogenesis, Fraccaro type; and type II, lethal achondrogenesis-hypochondrogenesis, Langer-Saldino type. Superti-Furga (1996) suggested that hypochondrogenesis should be considered separately from achondrogenesis type II because the phenotype can be much milder. </p>
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<h4>
<span class="mim-font">
<strong>Clinical Features</strong>
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<p>In a patient considered to have achondrogenesis type IB, Superti-Furga (1994) found that cartilage extracts showed a reduced content of proteoglycans and that unlike control cartilage they did not stain with toluidine blue and did not bind to DEAE. Impaired synthesis of sulfated proteoglycans was observed in fibroblast cultures from the patient. Radioactive labeling and immunoprecipitation studies indicated that core protein and side chains of proteoglycans were synthesized normally but were not sulfated. Analysis of sulfate metabolism in cultured fibroblasts in the patient's cells showed normal intracellular levels of free sulfate but markedly reduced levels of the 2 intermediate compounds in the sulfate activation pathway, adenosine-phosphosulfate and phosphoadenosine-phosphosulfate. Superti-Furga (1994) suggested that the results can be explained by deficient activity of one of the enzymes responsible for the biologic activation of sulfate, possibly similar to that observed in cartilage (but not in skin) of the recessive, nonlethal mouse mutant 'brachymorphic' and leading to defective sulfation of macromolecules (Orkin et al., 1976; Sugahara and Schwartz, 1979; Sugahara and Schwartz, 1982). </p><p>Superti-Furga et al. (1995) identified a sulfation defect in tissues and/or cells of 5 other type IB patients.</p>
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<div>
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<h4>
<span class="mim-font">
<strong>Diagnosis</strong>
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</h4>
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<span class="mim-text-font">
<p>Superti-Furga et al. (1996) observed that elucidation of the basic defect in ACG1B allows diagnosis by biochemical and molecular studies. They emphasized that accurate genetic counseling, particularly the distinction between ACG1B (which has a 25% recurrence risk) and the more frequent, autosomal dominant condition ACG2 (which usually involves the occurrence of new mutations and has a much lower recurrence risk), will be improved, and heterozygous carriers can be more readily detected. Couples at risk for having a child with ACG1B may decide to take advantage of molecular prenatal diagnosis by chorionic villus sampling, which can be done earlier than ultrasonographic diagnosis. </p>
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</div>
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<h4>
<span class="mim-font">
<strong>Molecular Genetics</strong>
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</h4>
</div>
<span class="mim-text-font">
<p>In 6 patients with ACG1B, Superti-Furga et al. (1996) identified 7 different, putatively pathogenic, homozygous or compound heterozygous mutations in the DTDST gene (see, e.g., 606718.0005 and 606718.0006). The mutations were identified by genomic PCR, SSCP, and direct sequencing. One of the mutations (606718.0001) had previously been identified in patients with diastrophic dysplasia (222600). Thus, achondrogenesis type IB is a recessive disorder allelic to diastrophic dysplasia. </p>
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<h4>
<span class="mim-font">
<strong>REFERENCES</strong>
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</h4>
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<p />
</div>
<div>
<ol>
<li>
<p class="mim-text-font">
Borochowitz, Z., Lachman, R., Adomian, G. E., Spear, G., Jones, K., Rimoin, D. L.
<strong>Achondrogenesis type I: delineation of further heterogeneity and identification of two distinct subgroups.</strong>
J. Pediat. 112: 23-31, 1988.
[PubMed: 3275766]
[Full Text: https://doi.org/10.1016/s0022-3476(88)80113-6]
</p>
</li>
<li>
<p class="mim-text-font">
Fraccaro, M.
<strong>Contributo allo studio delle malattie del mesenchima osteopoietico: l&#x27;acondrogenesi.</strong>
Folia Hered. Path. 1: 190-208, 1952.
</p>
</li>
<li>
<p class="mim-text-font">
Harris, R., Patton, J. T., Barson, A. J.
<strong>Pseudo-achondrogenesis with fractures.</strong>
Clin. Genet. 3: 435-441, 1972.
[PubMed: 4568361]
[Full Text: https://doi.org/10.1111/j.1399-0004.1972.tb01477.x]
</p>
</li>
<li>
<p class="mim-text-font">
Houston, C. S., Awen, C. F., Kent, H. P.
<strong>Fatal neonatal dwarfism.</strong>
J. Canad. Assoc. Radiol. 23: 45-61, 1972.
[PubMed: 5063132]
</p>
</li>
<li>
<p class="mim-text-font">
Langer, L. O., Jr., Spranger, J. W., Greinacher, I., Herdman, R. C.
<strong>Thanatophoric dwarfism: a condition confused with achondroplasia in the neonate, with brief comments on achondrogenesis and homozygous achondroplasia.</strong>
Radiology 92: 285-294, 1969.
[PubMed: 4885523]
[Full Text: https://doi.org/10.1148/92.2.285]
</p>
</li>
<li>
<p class="mim-text-font">
Maroteaux, P., Lamy, M.
<strong>Le diagnostic des nanismes chondro-dystrophiques chez les nouveau-nes.</strong>
Arch. Franc. Pediat. 25: 241-262, 1968.
[PubMed: 4970273]
</p>
</li>
<li>
<p class="mim-text-font">
Orkin, R. W., Pratt, R. M., Martin, G. R.
<strong>Undersulfated chondroitin sulfate in the cartilage matrix of brachymorphic mice.</strong>
Dev. Biol. 50: 82-94, 1976.
[PubMed: 1269836]
[Full Text: https://doi.org/10.1016/0012-1606(76)90069-5]
</p>
</li>
<li>
<p class="mim-text-font">
Parenti, G. C.
<strong>La anosteogenesi (una varieta della osteogenesi imperfetta).</strong>
Pathologica 28: 447-462, 1936.
</p>
</li>
<li>
<p class="mim-text-font">
Sugahara, K., Schwartz, N. B.
<strong>Defect in 3-prime-phosphoadenosine 5-prime-phosphosulfate synthesis in brachymorphic mice. I. Characterization of the defect.</strong>
Arch. Biochem. Biophys. 214: 589-601, 1982.
[PubMed: 6284029]
[Full Text: https://doi.org/10.1016/0003-9861(82)90064-9]
</p>
</li>
<li>
<p class="mim-text-font">
Sugahara, K., Schwartz, N. B.
<strong>Defect in 3-prime-phosphoadenosine 5-prime-phosphosulfate formation in brachymorphic mice.</strong>
Proc. Nat. Acad. Sci. 76: 6615-6618, 1979.
[PubMed: 230515]
[Full Text: https://doi.org/10.1073/pnas.76.12.6615]
</p>
</li>
<li>
<p class="mim-text-font">
Superti-Furga, A.
<strong>A defect in the metabolic activation of sulfate in a patient with achondrogenesis type IB.</strong>
Am. J. Hum. Genet. 55: 1137-1145, 1994.
[PubMed: 7977372]
</p>
</li>
<li>
<p class="mim-text-font">
Superti-Furga, A.
<strong>Achondrogenesis type 1B.</strong>
J. Med. Genet. 33: 957-961, 1996.
[PubMed: 8950678]
[Full Text: https://doi.org/10.1136/jmg.33.11.957]
</p>
</li>
<li>
<p class="mim-text-font">
Superti-Furga, A., Hastbacka, J., Cohn, D. H., Wilcox, W., van der Harten, H. J., Rimoin, D. L., Lander, E. S., Steinmann, B., Gitzelmann, R.
<strong>Defective sulfation of proteoglycans in achondrogenesis type IB is caused by mutations in the DTDST gene: the disorder is allelic to diastrophic dysplasia. (Abstract)</strong>
Am. J. Hum. Genet. 57: A48, 1995.
</p>
</li>
<li>
<p class="mim-text-font">
Superti-Furga, A., Hastbacka, J., Wilcox, W. R., Cohn, D. H., van der Harten, H. J., Rossi, A., Blau, N., Rimoin, D. L., Steinmann, B., Lander, E. S., Gitzelmann, R.
<strong>Achondrogenesis type IB is caused by mutations in the diastrophic dysplasia sulphate transporter gene.</strong>
Nature Genet. 12: 100-102, 1996.
[PubMed: 8528239]
[Full Text: https://doi.org/10.1038/ng0196-100]
</p>
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Marla J. F. O&#x27;Neill - updated : 1/22/2010
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Victor A. McKusick : 1/10/1996
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carol : 03/10/2015<br>carol : 3/9/2015<br>wwang : 1/25/2010<br>terry : 1/22/2010<br>carol : 2/3/2009<br>carol : 2/27/2002<br>terry : 12/3/1996<br>mark : 9/26/1996<br>terry : 9/17/1996<br>mark : 3/4/1996<br>mark : 2/19/1996<br>terry : 2/15/1996<br>mark : 1/17/1996<br>mark : 1/10/1996
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OMIM<sup>&reg;</sup> and Online Mendelian Inheritance in Man<sup>&reg;</sup> are registered trademarks of the Johns Hopkins University.
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Copyright<sup>&reg;</sup> 1966-2025 Johns Hopkins University.
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Printed: March 5, 2025
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