nih-gov/www.ncbi.nlm.nih.gov/omim/614678

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<title>
Entry
- #614678 - PONTOCEREBELLAR HYPOPLASIA, TYPE 1B; PCH1B
- OMIM
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<span class="h4">#614678</span>
<br />
<strong>Table of Contents</strong>
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<a href="#title"><strong>Title</strong></a>
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<a href="#phenotypeMap"><strong>Phenotype-Gene Relationships</strong></a>
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<a href="/clinicalSynopsis/614678"><strong>Clinical Synopsis</strong></a>
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<a href="/phenotypicSeries/PS607596"> <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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<li role="presentation" style="margin-left: 1em">
<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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<li role="presentation" style="margin-left: 1em">
<a href="#molecularGenetics">Molecular Genetics</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#genotypePhenotypeCorrelations">Genotype/Phenotype Correlations</a>
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<a href="#populationGenetics">Population 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=PONTOCEREBELLAR HYPOPLASIA, TYPE" class="mim-tip-hint" title="A registry of federally and privately supported clinical trials conducted in the United States and around the world." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Clinical Trials', 'domain': 'clinicaltrials.gov'})">Clinical Trials</a></div>
<div><a href="https://www.orpha.net/consor/cgi-bin/ClinicalLabs_Search_Simple.php?lng=EN&LnkId=3132&Typ=Pat" class="mim-tip-hint" title="A list of European laboratories that offer genetic testing." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'EuroGentest', 'domain': 'orpha.net'})">EuroGentest</a></div>
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<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>
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<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>ORPHA:</strong> 2254<br />
<strong>DO:</strong> 0060266<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>
614678
</span>
</span>
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<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
PONTOCEREBELLAR HYPOPLASIA, TYPE 1B; PCH1B
</span>
</h3>
</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/9/198?start=-3&limit=10&highlight=198">
9p13.2
</a>
</span>
</td>
<td>
<span class="mim-font">
Pontocerebellar hypoplasia, type 1B
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614678"> 614678 </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">
EXOSC3
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606489"> 606489 </a>
</span>
</td>
</tr>
</tbody>
</table>
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<a href="/clinicalSynopsis/614678" class="btn btn-warning" role="button"> Clinical Synopsis </a>
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&nbsp;
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<a href="/phenotypicSeries/PS607596" 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;
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<button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
PheneGene Graphics <span class="caret"></span>
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<ul class="dropdown-menu" style="width: 17em;">
<li><a href="/graph/linear/614678" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/614678" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Radial'})"> Radial </a></li>
</ul>
</div>
<span class="glyphicon glyphicon-question-sign mim-tip-hint" title="OMIM PheneGene graphics depict relationships between phenotypes, groups of related phenotypes (Phenotypic Series), and genes.<br /><a href='/static/omim/pdf/OMIM_Graphics.pdf' target='_blank'>A quick reference overview and guide (PDF)</a>"></span>
<div>
<p />
</div>
<div id="mimClinicalSynopsisFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small" style="margin: 5px">
<div>
<div>
<span class="h5 mim-font">
<strong> INHERITANCE </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Autosomal recessive <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/258211005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">258211005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0441748&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0441748</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> GROWTH </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Other </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Poor growth, postnatal <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1852375&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1852375</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001510" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001510</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">
- Microcephaly, postnatal, progressive (-2 to -3.5 SD) <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4013898&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4013898</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000253" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000253</a>]</span> <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/1148757008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">1148757008</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q02" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q02</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/742.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">742.1</a>]</span> <a href="https://elementsofmorphology.nih.gov/index.cgi?tid=0584d323b99dcd7001cc50e224947aca" target="_blank" class="small mim-tip-eom" title="&lt;img src=&quot;https://elementsofmorphology.nih.gov/images/terms/Microcephaly-small.jpg&quot;&gt; &lt;br/&gt;Further Information: &lt;a href=&quot;https://elementsofmorphology.nih.gov/index.cgi?tid=0584d323b99dcd7001cc50e224947aca&quot target=&quot;_blank&quot onclick=&quot;gtag(\'event\', \'mim_outbound\', {\'name\': \'EOM\', \'domain\': \'elementsofmorphology.nih.gov\'})&quot;&gt;Elements of Morphology&lt;/a&gt;"><span class="glyphicon glyphicon-user" aria-hidden="true"></span></a><br /> -
Poor head control <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836038&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836038</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002421" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002421</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002421" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002421</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Eyes </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Oculomotor apraxia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/193662007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">193662007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405810005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405810005</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405809000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405809000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/H16.32" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H16.32</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0543874&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0543874</a>, <a href="https://bioportal.bioontology.org/search?q=C0271270&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0271270</a>, <a href="https://bioportal.bioontology.org/search?q=C3489733&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3489733</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000657" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000657</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000657" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000657</a>]</span><br /> -
Nystagmus <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/563001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">563001</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/H55.0" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H55.0</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/H55.00" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H55.00</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/379.50" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">379.50</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0028738&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0028738</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000639" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000639</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000639" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000639</a>]</span><br /> -
Poor visual attention <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3553454&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3553454</a>]</span><br /> -
Strabismus <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/22066006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">22066006</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/H50.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H50.9</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/H50.40" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H50.40</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0038379&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0038379</a>, <a href="https://bioportal.bioontology.org/search?q=C2020541&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2020541</a>, <a href="https://bioportal.bioontology.org/search?q=C1423541&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1423541</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000486" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000486</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000486" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000486</a>]</span><br /> -
Retinal dystrophy (1 family) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/314407005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">314407005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0854723&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0854723</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000556" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000556</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000556" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000556</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Mouth </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Tongue atrophy <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/50805004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">50805004</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/K14.8" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">K14.8</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0241423&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0241423</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0012473" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0012473</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0012473" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0012473</a>]</span><br /> -
Tongue fasciculations <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/249878001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">249878001</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0239548&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0239548</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001308" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001308</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001308" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001308</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 />
</span>
</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> Gastrointestinal </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Poor feeding <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/299698007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">299698007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/78164000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">78164000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R63.3" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R63.3</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0576456&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0576456</a>, <a href="https://bioportal.bioontology.org/search?q=C0232466&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0232466</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0011968" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0011968</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0011968" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0011968</a>]</span><br />
</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">
- Joint contractures <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/7890003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">7890003</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/M24.5" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">M24.5</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/718.4" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">718.4</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/718.40" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">718.40</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0009918&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0009918</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0034392" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0034392</a>]</span><br />
</span>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Pelvis </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Hip dislocation <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/157265008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">157265008</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/S73.00" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">S73.00</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/835" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">835</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0019554&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0019554</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002827" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002827</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002827" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002827</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Feet </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Foot deformities <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/229844004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">229844004</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0016506&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0016506</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001760" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001760</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001760" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001760</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 /> -
Muscle weakness <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/26544005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">26544005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0151786&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0151786</a>, <a href="https://bioportal.bioontology.org/search?q=C0030552&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0030552</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001324" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001324</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001324" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001324</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 /> -
EMG shows neurogenic changes <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1843506&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1843506</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">
- Global developmental delay, variable severity <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4013896&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4013896</a>]</span> <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/224958001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">224958001</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/F88" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">F88</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001263" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001263</a>]</span><br /> -
Lack of motor milestones <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3553451&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3553451</a>]</span><br /> -
Axial hypotonia <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1853743&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1853743</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0008936" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0008936</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0008936" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0008936</a>]</span><br /> -
Spasticity <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/221360009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">221360009</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/397790002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">397790002</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0026838&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0026838</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001257" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001257</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001257" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001257</a>]</span><br /> -
Hyperreflexia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/86854008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">86854008</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0151889&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0151889</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001347" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001347</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001347" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001347</a>]</span><br /> -
Lack of speech <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1854882&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1854882</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001344" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001344</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001344" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001344</a>]</span><br /> -
Cerebral atrophy <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/278849000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">278849000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0235946&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0235946</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002059" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002059</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002059" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002059</a>]</span><br /> -
Cerebellar atrophy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0740279&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0740279</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001272" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001272</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001272" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001272</a>]</span><br /> -
Cerebellar cysts <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1847762&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1847762</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002350" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002350</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002350" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002350</a>]</span><br /> -
Seizures (in some patients) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/91175000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">91175000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0036572&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0036572</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001250" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001250</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001250" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001250</a>]</span><br /> -
Atrophy of the pons (in some patients) <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4013897&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4013897</a>]</span><br /> -
Loss of cerebellar Purkinje cells <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3281224&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3281224</a>]</span><br /> -
Loss of cerebellar granular cells <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3553452&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3553452</a>]</span><br /> -
Loss of motor neurons in the spinal cord <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3553453&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3553453</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">
- Axonal motor neuropathy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C2749625&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2749625</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0007002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0007002</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 at birth <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836142&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836142</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003577" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003577</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003577" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003577</a>]</span><br /> -
Early death may occur<br /> -
Variable severity <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1861403&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1861403</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003828" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003828</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003828" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003828</a>]</span><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 exosome component 3 gene (EXOSC3, <a href="/entry/606489#0001">606489.0001</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>
Pontocerebellar hypoplasia
- <a href="/phenotypicSeries/PS607596">PS607596</a>
- 27 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/1/555?start=-3&limit=10&highlight=555"> 1p34.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614969"> Pontocerebellar hypoplasia, type 7 </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/614969"> 614969 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613931"> TOE1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613931"> 613931 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/882?start=-3&limit=10&highlight=882"> 1p13.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615809"> Pontocerebellar hypoplasia, type 9 </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/615809"> 615809 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/102771"> AMPD2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/102771"> 102771 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/1495?start=-3&limit=10&highlight=1495"> 1q25.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617026"> Pontocerebellar hypoplasia, type 2F </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/617026"> 617026 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608756"> TSEN15 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608756"> 608756 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/68?start=-3&limit=10&highlight=68"> 3p25.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612389"> Pontocerebellar hypoplasia type 2B </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/612389"> 612389 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608753"> TSEN2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608753"> 608753 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/500?start=-3&limit=10&highlight=500"> 3q12.1-q12.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617695"> Pontocerebellar hypoplasia, type 11 </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/617695"> 617695 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617687"> TBC1D23 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617687"> 617687 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/4/132?start=-3&limit=10&highlight=132"> 4p15.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613811"> Pontocerebellar hypoplasia type 2D </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/613811"> 613811 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613009"> SEPSECS </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613009"> 613009 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/4/528?start=-3&limit=10&highlight=528"> 4q27 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618065"> Pontocerebellar hypoplasia, type 1D </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/618065"> 618065 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606180"> EXOSC9 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606180"> 606180 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/5/362?start=-3&limit=10&highlight=362"> 5q22.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619303"> Pontocerebellar hypoplasia, type 1E </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/619303"> 619303 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610826"> SLC25A46 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610826"> 610826 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/449?start=-3&limit=10&highlight=449"> 6p21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619301"> Pontocerebellar hypoplasia, type 14 </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/619301"> 619301 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601301"> PPIL1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601301"> 601301 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/694?start=-3&limit=10&highlight=694"> 6q15 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611523"> Pontocerebellar hypoplasia, type 6 </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/611523"> 611523 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611524"> RARS2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611524"> 611524 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/729?start=-3&limit=10&highlight=729"> 6q16.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619909"> Pontocerebellar hypoplasia, type 17 </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/619909"> 619909 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616741"> PRDM13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616741"> 616741 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/772?start=-3&limit=10&highlight=772"> 6q21 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619302"> ?Pontocerebellar hypoplasia, type 15 </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/619302"> 619302 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605585"> CDC40 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605585"> 605585 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/7/378?start=-3&limit=10&highlight=378"> 7q21.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608027"> Pontocerebellar hypoplasia, type 3 </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/608027"> 608027 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604918"> PCLO </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604918"> 604918 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/9/198?start=-3&limit=10&highlight=198"> 9p13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614678"> Pontocerebellar hypoplasia, type 1B </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/614678"> 614678 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606489"> EXOSC3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606489"> 606489 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/361?start=-3&limit=10&highlight=361"> 10q23.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619527"> Pontocerebellar hypoplasia, type 16 </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/619527"> 619527 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605391"> MINPP1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605391"> 605391 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/445?start=-3&limit=10&highlight=445"> 10q24.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619304"> ?Pontocerebellar hypoplasia, type 1F </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/619304"> 619304 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606493"> EXOSC1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606493"> 606493 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/399?start=-3&limit=10&highlight=399"> 11q12.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615803"> Pontocerebellar hypoplasia, type 10 </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/615803"> 615803 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608757"> CLP1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608757"> 608757 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/577?start=-3&limit=10&highlight=577"> 11q13.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618606"> Pontocerebellar hypoplasia, type 13 </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/618606"> 618606 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615738"> VPS51 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615738"> 615738 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/13/102?start=-3&limit=10&highlight=102"> 13q13.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616081"> Pontocerebellar hypoplasia, type 1C </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/616081"> 616081 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606019"> EXOSC8 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606019"> 606019 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/14/514?start=-3&limit=10&highlight=514"> 14q32.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607596"> Pontocerebellar hypoplasia type 1A </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/607596"> 607596 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602168"> VRK1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602168"> 602168 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/749?start=-3&limit=10&highlight=749"> 16q24.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614961"> Pontocerebellar hypoplasia, type 8 </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/614961"> 614961 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/164010"> CHMP1A </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/164010"> 164010 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/13?start=-3&limit=10&highlight=13"> 17p13.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615851"> Pontocerebellar hypoplasia, type 2E </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/615851"> 615851 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615850"> VPS53 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615850"> 615850 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/581?start=-3&limit=10&highlight=581"> 17q21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618266"> Pontocerebellar hypoplasia, type 12 </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/618266"> 618266 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609855"> COASY </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609855"> 609855 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/944?start=-3&limit=10&highlight=944"> 17q25.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/277470"> Pontocerebellar hypoplasia type 2A </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/277470"> 277470 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608755"> TSEN54 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608755"> 608755 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/944?start=-3&limit=10&highlight=944"> 17q25.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610204"> ?Pontocerebellar hypoplasia type 5 </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/610204"> 610204 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608755"> TSEN54 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608755"> 608755 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/944?start=-3&limit=10&highlight=944"> 17q25.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/225753"> Pontocerebellar hypoplasia type 4 </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/225753"> 225753 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608755"> TSEN54 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608755"> 608755 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/1124?start=-3&limit=10&highlight=1124"> 19q13.42 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612390"> ?Pontocerebellar hypoplasia type 2C </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/612390"> 612390 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608754"> TSEN34 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608754"> 608754 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
<div class="text-right small">
<a href="#mimPhenotypicSeriesFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
</div>
</div>
</div>
</div>
<div>
<br />
</div>
<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>
</span>
</span>
</h4>
<div id="mimTextFold" class="collapse in ">
<span class="mim-text-font">
<p>A number sign (#) is used with this entry because pontocerebellar hypoplasia type 1B (PCH1B) is caused by homozygous or compound heterozygous mutation in the EXOSC3 gene (<a href="/entry/606489">606489</a>) on chromosome 9p13.</p>
</span>
<div>
<br />
</div>
</div>
<div>
<a id="description" class="mim-anchor"></a>
<h4 href="#mimDescriptionFold" id="mimDescriptionToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimDescriptionToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Description</strong>
</span>
</h4>
</div>
<div id="mimDescriptionFold" class="collapse in ">
<span class="mim-text-font">
<p>Pontocerebellar hypoplasia type 1B is a severe autosomal recessive neurologic disorder characterized by a combination of cerebellar and spinal motor neuron degeneration beginning at birth. There is diffuse muscle weakness, progressive microcephaly, global developmental delay, and brainstem involvement (summary by <a href="#9" class="mim-tip-reference" title="Wan, J., Yourshaw, M., Mamsa, H., Rudnik-Schoneborn, S., Menezes, M. P., Hong, J. E., Leong, D. W., Senderek, J., Salman, M. S., Chitayat, D., Seeman, P., von Moers, A., and 14 others. &lt;strong&gt;Mutations in the RNA exosome component gene EXOSC3 cause pontocerebellar hypoplasia and spinal motor neuron degeneration.&lt;/strong&gt; Nature Genet. 44: 704-708, 2012.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/22544365/&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;22544365&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=22544365[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/10.1038/ng.2254&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="22544365">Wan et al., 2012</a>). PCH1B can be divided into mild, moderate, and severe subgroups that vary in age at onset, progression, clinical and neuroradiologic severity, and survival (summary by <a href="#3" class="mim-tip-reference" title="Halevy, A., Lerer, I., Cohen, R., Kornreich, L., Shuper, A., Gamliel, M., Zimerman, B.-E., Korabi, I., Meiner, V., Straussberg, R., Lossos, A. &lt;strong&gt;Novel EXOSC3 mutation causes complicated hereditary spastic paraplegia.&lt;/strong&gt; J. Neurol. 261: 2165-2169, 2014.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25149867/&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;25149867&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s00415-014-7457-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="25149867">Halevy et al., 2014</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?term=25149867+22544365" 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 phenotypic description and a discussion of genetic heterogeneity of PCH, see PCH1A (<a href="/entry/607596">607596</a>).</p>
</span>
<div>
<br />
</div>
</div>
<div>
<a id="clinicalFeatures" class="mim-anchor"></a>
<h4 href="#mimClinicalFeaturesFold" id="mimClinicalFeaturesToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimClinicalFeaturesToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Clinical Features</strong>
</span>
</h4>
</div>
<div id="mimClinicalFeaturesFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p><a href="#6" class="mim-tip-reference" title="Ryan, M. M., Cooke-Yarborough, C. M., Procopis, P. G., Ouvrier, R. A. &lt;strong&gt;Anterior horn cell disease and olivopontocerebellar hypoplasia.&lt;/strong&gt; Pediat. Neurol. 23: 180-184, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11020648/&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;11020648&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0887-8994(00)00166-1&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="11020648">Ryan et al. (2000)</a> reported 5 patients, including 2 sibs, with pontocerebellar hypoplasia associated with anterior horn cell disease of the spinal cord. The 2 sibs died at ages 6 days and 5 months, respectively. They both had severe hypotonia, were poorly responsive, and had respiratory insufficiency. Postmortem examination showed severe cerebellar atrophy with absent granular layer, decreased number of Purkinje cells, white matter gliosis, and a paucity of axons. Skeletal muscle showed neurogenic atrophy. Spinal cord examination in 1 sib showed decreased numbers of anterior horn cells. A third unrelated child had joint contractures, hip dislocation, and foot deformities at birth. He was severely hypotonic with only flickers of voluntary movement. He was visually nonreactive with nystagmus. He died of respiratory failure at age 3 months. Postmortem examination showed muscle atrophy, hypoplastic cerebellum, and degeneration of spinal cord anterior horn cells. A fourth infant had dysmorphic facies, foot deformities, poor feeding, and respiratory insufficiency. There was psychomotor delay with visual inattention. He was hypertonic but had progressive muscle weakness and died at age 11 months. The pons and cerebellum were hypoplastic and there was loss of anterior horn cells in the spinal cord. A fifth child was similarly affected. <a href="#6" class="mim-tip-reference" title="Ryan, M. M., Cooke-Yarborough, C. M., Procopis, P. G., Ouvrier, R. A. &lt;strong&gt;Anterior horn cell disease and olivopontocerebellar hypoplasia.&lt;/strong&gt; Pediat. Neurol. 23: 180-184, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11020648/&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;11020648&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0887-8994(00)00166-1&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="11020648">Ryan et al. (2000)</a> noted the similar phenotype in these patients, with hypotonia and severe weakness in the neonatal period, occasional spasticity, and abnormal brainstem signs. All had severe global developmental delay. The spinal cord changes resembled spinal muscular atrophy (SMA; <a href="/entry/253300">253300</a>), but the more severe phenotype in PCH type 1 reflected additional cerebellar and cerebral involvement. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11020648" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#7" class="mim-tip-reference" title="Salman, M. S., Buncic, J. R., Westall, C. A., Heon, E., Becker, L. &lt;strong&gt;Pontocerebellar hypoplasia type 1: new leads for an earlier diagnosis. (Letter)&lt;/strong&gt; J. Child Neurol. 18: 220-225, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12731647/&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;12731647&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1177/08830738030180031201&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="12731647">Salman et al. (2003)</a> reported 2 sibs, born of unrelated Spanish-Cuban parents, with pontocerebellar hypoplasia type 1. A boy presented with nystagmus, axial hypotonia, and hypertonic lower extremities at age 3 months. He made little developmental progress and developed fatal respiratory failure due to pneumonia at age 14 months. CT scan at age 8 months showed generalized brain atrophy. His younger sister showed feeding difficulties, severe global developmental delay, and poor head control in infancy. She had increased tone in the lower extremities, brisk reflexes, nystagmus, microcephaly, and pontocerebellar hypoplasia on brain scan. Funduscopy suggested retinal dystrophy, and electroretinographic studies indicated a progressive rod/cone dystrophy. She also had an abnormal sleep breathing pattern. She died at age 40 months of respiratory failure. Postmortem examination showed anterior horn cell degeneration of the spinal cord and marked loss of Purkinje and granular cells with gliosis in the cerebellum. Skeletal muscles showed neurogenic atrophy, and sural nerve biopsy showed axonopathy. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12731647" 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="#5" class="mim-tip-reference" title="Rudnik-Schoneborn, S., Sztriha, L., Aithala, G. R., Houge, G., Laegreid, L. M., Seeger, J., Huppke, M., Wirth, B., Zerres, K. &lt;strong&gt;Extended phenotype of pontocerebellar hypoplasia with infantile spinal muscular atrophy.&lt;/strong&gt; Am. J. Med. Genet. 117A: 10-17, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12548734/&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;12548734&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/ajmg.a.10863&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="12548734">Rudnik-Schoneborn et al. (2003)</a> described 6 patients from 4 families (3 German and 1 Norwegian) with pontocerebellar hypoplasia associated with infantile spinal muscular atrophy. The patients presented at birth or within the first 6 months of life with profound hypotonia followed by severely delayed psychomotor development and absent speech. Brain imaging showed cerebellar hypoplasia. In addition, 2 sisters also had a retrocerebellar cyst and another patient had profound pontocerebellar hypoplasia with a hypotrophic brainstem. All patients underwent testing for infantile SMA1 (<a href="/entry/253300">253300</a>), and homozygous absence of the SMN1 gene (<a href="/entry/600354">600354</a>) was excluded in all. In a review of these patients, <a href="#4" class="mim-tip-reference" title="Rudnik-Schoneborn, S., Senderek, J., Jen, J. C., Houge, G., Seeman, P., Puchmajerova, A., Graul-Neumann, L., Seidel, U., Korinthenberg, R., Kirschner, J., Seeger, J., Ryan, M. M., and 15 others. &lt;strong&gt;Pontocerebellar hypoplasia type 1: clinical spectrum and relevance of EXOSC3 mutations.&lt;/strong&gt; Neurology 80: 438-446, 2013.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/23284067/&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;23284067&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=23284067[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/10.1212/WNL.0b013e31827f0f66&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="23284067">Rudnik-Schoneborn et al. (2013)</a> noted that all but 1 of the children died within the first years of life. One had epilepsy, 2 had infantile seizures, and 3 had nystagmus. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=12548734+23284067" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#9" class="mim-tip-reference" title="Wan, J., Yourshaw, M., Mamsa, H., Rudnik-Schoneborn, S., Menezes, M. P., Hong, J. E., Leong, D. W., Senderek, J., Salman, M. S., Chitayat, D., Seeman, P., von Moers, A., and 14 others. &lt;strong&gt;Mutations in the RNA exosome component gene EXOSC3 cause pontocerebellar hypoplasia and spinal motor neuron degeneration.&lt;/strong&gt; Nature Genet. 44: 704-708, 2012.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/22544365/&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;22544365&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=22544365[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/10.1038/ng.2254&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="22544365">Wan et al. (2012)</a> reported a family of American and European origin in which 4 brothers had PCH1B. All were hypotonic at birth and showed global developmental delay, without achieving any motor milestones. Although normal in size at birth, they all showed progressive microcephaly and severe growth retardation within the first year. Other features included oculomotor apraxia, progressive muscle wasting, and distal contractures. They never learned to speak. Brain MRI showed marked cerebellar atrophy with prominent sulci and decreased volume of folia. The brainstem and cerebral cortex appeared normal, but were small. The patients were 9, 16, and 18 years at the time of the report; 1 died at age 18 years. Electromyography in 2 patients showed neurogenic changes of denervation and reinnervation consistent with axonal loss. Nerve conduction studies showed impaired motor responses and normal sensory responses. Postmortem examination of 1 patient showed severe loss of cerebellar and spinal motor neurons. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=22544365" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#8" class="mim-tip-reference" title="Schwabova, J., Brozkova, D. S., Petrak, B., Mojzisova, M., Pavlickova, K., Haberlova, J., Mrazkova, L., Hedvicakova, P., Hornofova, L., Kaluzova, M., Fencl, F., Krutova, M., Zamecnik, J., Seeman, P. &lt;strong&gt;Homozygous EXOSC3 mutation c.92G-C, p.G31A is a founder mutation causing severe pontocerebellar hypoplasia type 1 among the Czech Roma.&lt;/strong&gt; J. Neurogenet. 27: 163-169, 2013.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/23883322/&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;23883322&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.3109/01677063.2013.814651&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="23883322">Schwabova et al. (2013)</a> reported 3 unrelated Czech children of Roma descent with PCH1B. One of the patients had previously been reported by <a href="#9" class="mim-tip-reference" title="Wan, J., Yourshaw, M., Mamsa, H., Rudnik-Schoneborn, S., Menezes, M. P., Hong, J. E., Leong, D. W., Senderek, J., Salman, M. S., Chitayat, D., Seeman, P., von Moers, A., and 14 others. &lt;strong&gt;Mutations in the RNA exosome component gene EXOSC3 cause pontocerebellar hypoplasia and spinal motor neuron degeneration.&lt;/strong&gt; Nature Genet. 44: 704-708, 2012.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/22544365/&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;22544365&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=22544365[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/10.1038/ng.2254&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="22544365">Wan et al. (2012)</a>. All presented at birth with severe hypotonia, muscle weakness with areflexia, and sucking difficulties. Two patients had congenital contractures. The infants later showed progressive microcephaly, severe global developmental delay, weak cry, growth retardation, and visual impairment. None had spontaneous antigravity movements; 1 had tongue fasciculations. Brain imaging showed cerebellar hypoplasia, severe hypoplasia of the vermis, and mild hypoplasia of the brainstem. All patients died of respiratory insufficiency before 2 years of age. Postmortem examination of 2 patients showed short cerebellar folia with poor branching, loss of Purkinje cells and neurons in the granular layer, pontine hypoplasia, segmental loss of the inferior olivary nucleus, and loss of motor neurons in the anterior horn cells of the spinal cord. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=22544365+23883322" 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>Clinical Variability</em></strong></p><p>
<a href="#10" class="mim-tip-reference" title="Zanni, G., Scotton, C., Passarelli, C., Fang, M., Barresi, S., Dallapiccola, B., Wu, B., Gualandi, F., Ferlini, A., Bertini, E., Wei, W. &lt;strong&gt;Exome sequencing in a family with intellectual disability, early onset spasticity, and cerebellar atrophy detects a novel mutation in EXOSC3.&lt;/strong&gt; Neurogenetics 14: 247-250, 2013.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/23975261/&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;23975261&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s10048-013-0371-z&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="23975261">Zanni et al. (2013)</a> reported 2 sibs, born of unrelated Bangladeshi parents, with a relatively mild form of PCH1B confirmed by genetic analysis (D132A, <a href="/entry/606489#0001">606489.0001</a> and V80F, <a href="/entry/606489#0006">606489.0006</a> in the EXOSC3 gene). Both patients had delayed motor development, difficulty walking, and distal amyotrophy. The older sib had severe spasticity and became wheelchair-bound in his teens; his younger sister retained ambulation with support in her teens. Both had mild to moderate intellectual disability, but the sister was able to attend school. Other features included adducted thumbs, talipes valgus, tongue atrophy, fasciculations, brisk tendon reflexes, and gaze-evoked nystagmus. Brain imaging showed cerebellar atrophy with normal brainstem. Neither patient had hypotonia or microcephaly. The report expanded the phenotypic spectrum associated with EXOSC3 mutations to include hereditary spastic paraplegia. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=23975261" 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="#3" class="mim-tip-reference" title="Halevy, A., Lerer, I., Cohen, R., Kornreich, L., Shuper, A., Gamliel, M., Zimerman, B.-E., Korabi, I., Meiner, V., Straussberg, R., Lossos, A. &lt;strong&gt;Novel EXOSC3 mutation causes complicated hereditary spastic paraplegia.&lt;/strong&gt; J. Neurol. 261: 2165-2169, 2014.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25149867/&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;25149867&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s00415-014-7457-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="25149867">Halevy et al. (2014)</a> reported 2 pairs of sibs from a large consanguineous family of Arab origin with a mild form of PCH1B presenting as complicated hereditary spastic paraplegia with variable cognitive impairment. Whole-exome sequencing identified a homozygous missense mutation in the EXOSC3 gene (G191C; <a href="/entry/606489#0007">606489.0007</a>) that segregated with the disorder, but functional studies were not performed. The patients were 12 to 21 years of age at the time of the report. All showed delayed motor development with late walking and eventual deterioration of walking ability. All patients had mild cerebellar signs, including nystagmus with or without intention tremor and dysmetria, and brain imaging of all patients showed mild hypoplasia and atrophy of the lower part of the vermis with a normal pons. None had microcephaly or lower motor neuron signs, and spinal imaging was normal. <a href="#3" class="mim-tip-reference" title="Halevy, A., Lerer, I., Cohen, R., Kornreich, L., Shuper, A., Gamliel, M., Zimerman, B.-E., Korabi, I., Meiner, V., Straussberg, R., Lossos, A. &lt;strong&gt;Novel EXOSC3 mutation causes complicated hereditary spastic paraplegia.&lt;/strong&gt; J. Neurol. 261: 2165-2169, 2014.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25149867/&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;25149867&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s00415-014-7457-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="25149867">Halevy et al. (2014)</a> emphasized the mild phenotype in these patients. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=25149867" 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 PCH in the families reported by <a href="#9" class="mim-tip-reference" title="Wan, J., Yourshaw, M., Mamsa, H., Rudnik-Schoneborn, S., Menezes, M. P., Hong, J. E., Leong, D. W., Senderek, J., Salman, M. S., Chitayat, D., Seeman, P., von Moers, A., and 14 others. &lt;strong&gt;Mutations in the RNA exosome component gene EXOSC3 cause pontocerebellar hypoplasia and spinal motor neuron degeneration.&lt;/strong&gt; Nature Genet. 44: 704-708, 2012.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/22544365/&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;22544365&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=22544365[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/10.1038/ng.2254&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="22544365">Wan et al. (2012)</a> is consistent with autosomal recessive inheritance. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=22544365" 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 affected members of 9 families with autosomal recessive pontocerebellar hypoplasia type 1B, <a href="#9" class="mim-tip-reference" title="Wan, J., Yourshaw, M., Mamsa, H., Rudnik-Schoneborn, S., Menezes, M. P., Hong, J. E., Leong, D. W., Senderek, J., Salman, M. S., Chitayat, D., Seeman, P., von Moers, A., and 14 others. &lt;strong&gt;Mutations in the RNA exosome component gene EXOSC3 cause pontocerebellar hypoplasia and spinal motor neuron degeneration.&lt;/strong&gt; Nature Genet. 44: 704-708, 2012.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/22544365/&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;22544365&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=22544365[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/10.1038/ng.2254&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="22544365">Wan et al. (2012)</a> identified homozygous or compound heterozygous mutations in the EXOSC3 gene (see, e.g., <a href="/entry/606489#0001">606489.0001</a>-<a href="/entry/606489#0005">606489.0005</a>). The first mutation was identified by genomewide scan and exome sequencing of a family with 4 affected brothers. One of the patients had been reported by <a href="#7" class="mim-tip-reference" title="Salman, M. S., Buncic, J. R., Westall, C. A., Heon, E., Becker, L. &lt;strong&gt;Pontocerebellar hypoplasia type 1: new leads for an earlier diagnosis. (Letter)&lt;/strong&gt; J. Child Neurol. 18: 220-225, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12731647/&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;12731647&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1177/08830738030180031201&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="12731647">Salman et al. (2003)</a>, and 2 by <a href="#6" class="mim-tip-reference" title="Ryan, M. M., Cooke-Yarborough, C. M., Procopis, P. G., Ouvrier, R. A. &lt;strong&gt;Anterior horn cell disease and olivopontocerebellar hypoplasia.&lt;/strong&gt; Pediat. Neurol. 23: 180-184, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11020648/&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;11020648&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0887-8994(00)00166-1&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="11020648">Ryan et al. (2000)</a>. The findings indicated that proper RNA processing is important for the development and survival of cerebellar and spinal motor neurons. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=12731647+11020648+22544365" 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="genotypePhenotypeCorrelations" class="mim-anchor"></a>
<h4 href="#mimGenotypePhenotypeCorrelationsFold" id="mimGenotypePhenotypeCorrelationsToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimGenotypePhenotypeCorrelationsToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
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<strong>Genotype/Phenotype Correlations</strong>
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<p><a href="#4" class="mim-tip-reference" title="Rudnik-Schoneborn, S., Senderek, J., Jen, J. C., Houge, G., Seeman, P., Puchmajerova, A., Graul-Neumann, L., Seidel, U., Korinthenberg, R., Kirschner, J., Seeger, J., Ryan, M. M., and 15 others. &lt;strong&gt;Pontocerebellar hypoplasia type 1: clinical spectrum and relevance of EXOSC3 mutations.&lt;/strong&gt; Neurology 80: 438-446, 2013.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/23284067/&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;23284067&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=23284067[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/10.1212/WNL.0b013e31827f0f66&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="23284067">Rudnik-Schoneborn et al. (2013)</a> identified biallelic EXOSC3 mutations in 10 (37%) of 27 families with PCH with spinal muscular atrophy. Seven of the mutation-positive families had previously been reported (<a href="#5" class="mim-tip-reference" title="Rudnik-Schoneborn, S., Sztriha, L., Aithala, G. R., Houge, G., Laegreid, L. M., Seeger, J., Huppke, M., Wirth, B., Zerres, K. &lt;strong&gt;Extended phenotype of pontocerebellar hypoplasia with infantile spinal muscular atrophy.&lt;/strong&gt; Am. J. Med. Genet. 117A: 10-17, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12548734/&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;12548734&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/ajmg.a.10863&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="12548734">Rudnik-Schoneborn et al., 2003</a>; <a href="#9" class="mim-tip-reference" title="Wan, J., Yourshaw, M., Mamsa, H., Rudnik-Schoneborn, S., Menezes, M. P., Hong, J. E., Leong, D. W., Senderek, J., Salman, M. S., Chitayat, D., Seeman, P., von Moers, A., and 14 others. &lt;strong&gt;Mutations in the RNA exosome component gene EXOSC3 cause pontocerebellar hypoplasia and spinal motor neuron degeneration.&lt;/strong&gt; Nature Genet. 44: 704-708, 2012.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/22544365/&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;22544365&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=22544365[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/10.1038/ng.2254&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="22544365">Wan et al., 2012</a>). The most common mutation was D132A (<a href="/entry/606489#0001">606489.0001</a>), found in 11 (55%) of 20 mutated alleles, and haplotype analysis suggested a founder effect for this mutation. All patients had hypotonia, progressive muscular atrophy, and global developmental delay, but there was variation in the clinical presentation and survival. Individuals homozygous for the D132A mutation had the mildest phenotype; they presented in the first 6 months of life, had preserved respiratory function and cerebellar hypoplasia with a well-structured pons, and survived beyond infancy, even up to 20 years of age in 1 patient. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=22544365+12548734+23284067" 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="Biancheri, R., Cassandrini, D., Pinto, F., Trovato, R., Di Rocco, M., Mirabelli-Badenier, M., Pedemonte, M., Panicucci, C., Trucks, H., Sander, T., Zara, F., Rossi, A., Striano, P., Minetti, C., Santorelli, F. M. &lt;strong&gt;EXOSC3 mutations in isolated cerebellar hypoplasia and spinal anterior horn involvement.&lt;/strong&gt; J. Neurol. 260: 1866-1870, 2013.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/23564332/&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;23564332&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s00415-013-6896-0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="23564332">Biancheri et al. (2013)</a> reported 2 sets of brothers from 2 unrelated families with PCH1B and spinal anterior horn involvement associated with a homozygous D132A mutation in the EXOSC3 gene. The patients had onset of microcephaly in the first months of life, delayed psychomotor development, and severe axial muscle hypotonia with variable limb hypertonia and extensor plantar responses, but they had prolonged survival compared to some previously reported patients. One 14-year-old patient could walk with support until age 10. None of the patients had seizures. Brain imaging showed isolated cerebellar hypoplasia with normal pontine volume. <a href="#1" class="mim-tip-reference" title="Biancheri, R., Cassandrini, D., Pinto, F., Trovato, R., Di Rocco, M., Mirabelli-Badenier, M., Pedemonte, M., Panicucci, C., Trucks, H., Sander, T., Zara, F., Rossi, A., Striano, P., Minetti, C., Santorelli, F. M. &lt;strong&gt;EXOSC3 mutations in isolated cerebellar hypoplasia and spinal anterior horn involvement.&lt;/strong&gt; J. Neurol. 260: 1866-1870, 2013.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/23564332/&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;23564332&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s00415-013-6896-0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="23564332">Biancheri et al. (2013)</a> noted the genotype/phenotype correlation of a comparatively mild form of PCH1B associated with a homozygous D132A mutation. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=23564332" 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="Eggens, V. R. C., Barth, P. G., Niermeijer, J.-M. F., Berg, J. N., Darin, N., Dixit, A., Fluss, J., Foulds, N., Fowler, D., Hortobagyi, T., Jacques, T., King, M. D., and 18 others. &lt;strong&gt;EXOSC3 mutations in pontocerebellar hypoplasia type 1: novel mutations and genotype-phenotype correlations.&lt;/strong&gt; Orphanet J. Rare Dis. 9: 23, 2014. Note: Electronic Article.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/24524299/&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;24524299&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=24524299[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/10.1186/1750-1172-9-23&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="24524299">Eggens et al. (2014)</a> reported 14 patients from 12 families with PCH1B. Six patients from 5 families, all of Roma descent, carried the same homozygous G31A mutation in EXOSC3 (<a href="/entry/606489#0004">606489.0004</a>). All of these patients had a severe form of the disorder, with hypotonic paresis at birth, areflexia, variable microcephaly and contractures, and death by 7 months of age. In contrast, 3 patients from 2 Caucasian families who were homozygous for the D132A mutation (<a href="/entry/606489#0001">606489.0001</a>) showed a milder course, with dyskinesia, dystonia, brisk tendon reflexes in 2, and visual and auditory responses; these children survived until later childhood (up to 12 years of age). Four additional children who were compound heterozygous for D132A and a truncating mutation or a missense mutation had a severe clinical course, with hypotonia at birth, contractures, and death in infancy. Two patients had seizures. Finally, a patient who was homozygous for a G135E mutation had hypotonia, contractures, and no response to external stimuli; he died at age 8 weeks. Brain imaging showed differing patterns of cerebellar atrophy in all patients studied. In addition, 3 patients who were compound heterozygous for D132A and a truncating mutation had cerebellar cysts, while patients homozygous for D132A had a normal pons. <a href="#2" class="mim-tip-reference" title="Eggens, V. R. C., Barth, P. G., Niermeijer, J.-M. F., Berg, J. N., Darin, N., Dixit, A., Fluss, J., Foulds, N., Fowler, D., Hortobagyi, T., Jacques, T., King, M. D., and 18 others. &lt;strong&gt;EXOSC3 mutations in pontocerebellar hypoplasia type 1: novel mutations and genotype-phenotype correlations.&lt;/strong&gt; Orphanet J. Rare Dis. 9: 23, 2014. Note: Electronic Article.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/24524299/&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;24524299&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=24524299[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/10.1186/1750-1172-9-23&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="24524299">Eggens et al. (2014)</a> concluded that homozygosity for the D132A mutation leads to PCH with possible survival into early puberty and preservation of the pons, whereas other mutations cause the more severe phenotype. Functional studies of the variants were not performed. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=24524299" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="populationGenetics" class="mim-anchor"></a>
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<strong>Population Genetics</strong>
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<p><a href="#8" class="mim-tip-reference" title="Schwabova, J., Brozkova, D. S., Petrak, B., Mojzisova, M., Pavlickova, K., Haberlova, J., Mrazkova, L., Hedvicakova, P., Hornofova, L., Kaluzova, M., Fencl, F., Krutova, M., Zamecnik, J., Seeman, P. &lt;strong&gt;Homozygous EXOSC3 mutation c.92G-C, p.G31A is a founder mutation causing severe pontocerebellar hypoplasia type 1 among the Czech Roma.&lt;/strong&gt; J. Neurogenet. 27: 163-169, 2013.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/23883322/&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;23883322&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.3109/01677063.2013.814651&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="23883322">Schwabova et al. (2013)</a> identified a homozygous G31A mutation in the EXOSC3 gene (<a href="/entry/606489#0004">606489.0004</a>) in 32 unrelated Czech children of Roma descent with PCH1B. The heterozygous mutation was found in 4 (4.4%) of 90 unrelated Roma control individuals, and haplotype analysis suggested a founder effect. The patients had a severe form of the disorder, with death in the first year of life. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=23883322" 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>
<h4 href="#mimReferencesFold" id="mimReferencesToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span class="mim-font">
<span id="mimReferencesToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<strong>REFERENCES</strong>
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</h4>
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<div id="mimReferencesFold" class="collapse in mimTextToggleFold">
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<a id="1" class="mim-anchor"></a>
<a id="Biancheri2013" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Biancheri, R., Cassandrini, D., Pinto, F., Trovato, R., Di Rocco, M., Mirabelli-Badenier, M., Pedemonte, M., Panicucci, C., Trucks, H., Sander, T., Zara, F., Rossi, A., Striano, P., Minetti, C., Santorelli, F. M.
<strong>EXOSC3 mutations in isolated cerebellar hypoplasia and spinal anterior horn involvement.</strong>
J. Neurol. 260: 1866-1870, 2013.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/23564332/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">23564332</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=23564332" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1007/s00415-013-6896-0" target="_blank">Full Text</a>]
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<a id="2" class="mim-anchor"></a>
<a id="Eggens2014" class="mim-anchor"></a>
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Eggens, V. R. C., Barth, P. G., Niermeijer, J.-M. F., Berg, J. N., Darin, N., Dixit, A., Fluss, J., Foulds, N., Fowler, D., Hortobagyi, T., Jacques, T., King, M. D., and 18 others.
<strong>EXOSC3 mutations in pontocerebellar hypoplasia type 1: novel mutations and genotype-phenotype correlations.</strong>
Orphanet J. Rare Dis. 9: 23, 2014. Note: Electronic Article.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/24524299/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">24524299</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=24524299[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=24524299" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1186/1750-1172-9-23" target="_blank">Full Text</a>]
</p>
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<a id="3" class="mim-anchor"></a>
<a id="Halevy2014" class="mim-anchor"></a>
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Halevy, A., Lerer, I., Cohen, R., Kornreich, L., Shuper, A., Gamliel, M., Zimerman, B.-E., Korabi, I., Meiner, V., Straussberg, R., Lossos, A.
<strong>Novel EXOSC3 mutation causes complicated hereditary spastic paraplegia.</strong>
J. Neurol. 261: 2165-2169, 2014.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/25149867/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">25149867</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=25149867" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1007/s00415-014-7457-x" target="_blank">Full Text</a>]
</p>
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<a id="4" class="mim-anchor"></a>
<a id="Rudnik-Schoneborn2013" class="mim-anchor"></a>
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Rudnik-Schoneborn, S., Senderek, J., Jen, J. C., Houge, G., Seeman, P., Puchmajerova, A., Graul-Neumann, L., Seidel, U., Korinthenberg, R., Kirschner, J., Seeger, J., Ryan, M. M., and 15 others.
<strong>Pontocerebellar hypoplasia type 1: clinical spectrum and relevance of EXOSC3 mutations.</strong>
Neurology 80: 438-446, 2013.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/23284067/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">23284067</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=23284067[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=23284067" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1212/WNL.0b013e31827f0f66" target="_blank">Full Text</a>]
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<a id="5" class="mim-anchor"></a>
<a id="Rudnik-Schoneborn2003" class="mim-anchor"></a>
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Rudnik-Schoneborn, S., Sztriha, L., Aithala, G. R., Houge, G., Laegreid, L. M., Seeger, J., Huppke, M., Wirth, B., Zerres, K.
<strong>Extended phenotype of pontocerebellar hypoplasia with infantile spinal muscular atrophy.</strong>
Am. J. Med. Genet. 117A: 10-17, 2003.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12548734/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12548734</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12548734" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1002/ajmg.a.10863" target="_blank">Full Text</a>]
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<a id="6" class="mim-anchor"></a>
<a id="Ryan2000" class="mim-anchor"></a>
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Ryan, M. M., Cooke-Yarborough, C. M., Procopis, P. G., Ouvrier, R. A.
<strong>Anterior horn cell disease and olivopontocerebellar hypoplasia.</strong>
Pediat. Neurol. 23: 180-184, 2000.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11020648/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11020648</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11020648" 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/s0887-8994(00)00166-1" target="_blank">Full Text</a>]
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<a id="7" class="mim-anchor"></a>
<a id="Salman2003" class="mim-anchor"></a>
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Salman, M. S., Buncic, J. R., Westall, C. A., Heon, E., Becker, L.
<strong>Pontocerebellar hypoplasia type 1: new leads for an earlier diagnosis. (Letter)</strong>
J. Child Neurol. 18: 220-225, 2003.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12731647/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12731647</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12731647" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1177/08830738030180031201" target="_blank">Full Text</a>]
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<a id="8" class="mim-anchor"></a>
<a id="Schwabova2013" class="mim-anchor"></a>
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Schwabova, J., Brozkova, D. S., Petrak, B., Mojzisova, M., Pavlickova, K., Haberlova, J., Mrazkova, L., Hedvicakova, P., Hornofova, L., Kaluzova, M., Fencl, F., Krutova, M., Zamecnik, J., Seeman, P.
<strong>Homozygous EXOSC3 mutation c.92G-C, p.G31A is a founder mutation causing severe pontocerebellar hypoplasia type 1 among the Czech Roma.</strong>
J. Neurogenet. 27: 163-169, 2013.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/23883322/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">23883322</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=23883322" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.3109/01677063.2013.814651" target="_blank">Full Text</a>]
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<a id="Wan2012" class="mim-anchor"></a>
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Wan, J., Yourshaw, M., Mamsa, H., Rudnik-Schoneborn, S., Menezes, M. P., Hong, J. E., Leong, D. W., Senderek, J., Salman, M. S., Chitayat, D., Seeman, P., von Moers, A., and 14 others.
<strong>Mutations in the RNA exosome component gene EXOSC3 cause pontocerebellar hypoplasia and spinal motor neuron degeneration.</strong>
Nature Genet. 44: 704-708, 2012.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/22544365/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">22544365</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=22544365[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=22544365" 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/ng.2254" target="_blank">Full Text</a>]
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<a id="10" class="mim-anchor"></a>
<a id="Zanni2013" class="mim-anchor"></a>
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Zanni, G., Scotton, C., Passarelli, C., Fang, M., Barresi, S., Dallapiccola, B., Wu, B., Gualandi, F., Ferlini, A., Bertini, E., Wei, W.
<strong>Exome sequencing in a family with intellectual disability, early onset spasticity, and cerebellar atrophy detects a novel mutation in EXOSC3.</strong>
Neurogenetics 14: 247-250, 2013.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/23975261/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">23975261</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=23975261" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1007/s10048-013-0371-z" target="_blank">Full Text</a>]
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Cassandra L. Kniffin - updated : 2/18/2015
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Cassandra L. Kniffin - updated : 12/22/2014<br>Cassandra L. Kniffin - updated : 12/8/2014
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Cassandra L. Kniffin : 6/7/2012
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carol : 2/24/2015<br>mcolton : 2/18/2015<br>ckniffin : 2/18/2015<br>carol : 12/22/2014<br>ckniffin : 12/22/2014<br>carol : 12/15/2014<br>mcolton : 12/10/2014<br>ckniffin : 12/8/2014<br>terry : 6/12/2012<br>terry : 6/8/2012<br>carol : 6/8/2012<br>ckniffin : 6/7/2012
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<strong>#</strong> 614678
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PONTOCEREBELLAR HYPOPLASIA, TYPE 1B; PCH1B
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<strong>ORPHA:</strong> 2254; &nbsp;
<strong>DO:</strong> 0060266; &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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9p13.2
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Pontocerebellar hypoplasia, type 1B
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614678
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Autosomal recessive
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3
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EXOSC3
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606489
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because pontocerebellar hypoplasia type 1B (PCH1B) is caused by homozygous or compound heterozygous mutation in the EXOSC3 gene (606489) on chromosome 9p13.</p>
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<strong>Description</strong>
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<p>Pontocerebellar hypoplasia type 1B is a severe autosomal recessive neurologic disorder characterized by a combination of cerebellar and spinal motor neuron degeneration beginning at birth. There is diffuse muscle weakness, progressive microcephaly, global developmental delay, and brainstem involvement (summary by Wan et al., 2012). PCH1B can be divided into mild, moderate, and severe subgroups that vary in age at onset, progression, clinical and neuroradiologic severity, and survival (summary by Halevy et al., 2014). </p><p>For a phenotypic description and a discussion of genetic heterogeneity of PCH, see PCH1A (607596).</p>
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<strong>Clinical Features</strong>
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<p>Ryan et al. (2000) reported 5 patients, including 2 sibs, with pontocerebellar hypoplasia associated with anterior horn cell disease of the spinal cord. The 2 sibs died at ages 6 days and 5 months, respectively. They both had severe hypotonia, were poorly responsive, and had respiratory insufficiency. Postmortem examination showed severe cerebellar atrophy with absent granular layer, decreased number of Purkinje cells, white matter gliosis, and a paucity of axons. Skeletal muscle showed neurogenic atrophy. Spinal cord examination in 1 sib showed decreased numbers of anterior horn cells. A third unrelated child had joint contractures, hip dislocation, and foot deformities at birth. He was severely hypotonic with only flickers of voluntary movement. He was visually nonreactive with nystagmus. He died of respiratory failure at age 3 months. Postmortem examination showed muscle atrophy, hypoplastic cerebellum, and degeneration of spinal cord anterior horn cells. A fourth infant had dysmorphic facies, foot deformities, poor feeding, and respiratory insufficiency. There was psychomotor delay with visual inattention. He was hypertonic but had progressive muscle weakness and died at age 11 months. The pons and cerebellum were hypoplastic and there was loss of anterior horn cells in the spinal cord. A fifth child was similarly affected. Ryan et al. (2000) noted the similar phenotype in these patients, with hypotonia and severe weakness in the neonatal period, occasional spasticity, and abnormal brainstem signs. All had severe global developmental delay. The spinal cord changes resembled spinal muscular atrophy (SMA; 253300), but the more severe phenotype in PCH type 1 reflected additional cerebellar and cerebral involvement. </p><p>Salman et al. (2003) reported 2 sibs, born of unrelated Spanish-Cuban parents, with pontocerebellar hypoplasia type 1. A boy presented with nystagmus, axial hypotonia, and hypertonic lower extremities at age 3 months. He made little developmental progress and developed fatal respiratory failure due to pneumonia at age 14 months. CT scan at age 8 months showed generalized brain atrophy. His younger sister showed feeding difficulties, severe global developmental delay, and poor head control in infancy. She had increased tone in the lower extremities, brisk reflexes, nystagmus, microcephaly, and pontocerebellar hypoplasia on brain scan. Funduscopy suggested retinal dystrophy, and electroretinographic studies indicated a progressive rod/cone dystrophy. She also had an abnormal sleep breathing pattern. She died at age 40 months of respiratory failure. Postmortem examination showed anterior horn cell degeneration of the spinal cord and marked loss of Purkinje and granular cells with gliosis in the cerebellum. Skeletal muscles showed neurogenic atrophy, and sural nerve biopsy showed axonopathy. </p><p>Rudnik-Schoneborn et al. (2003) described 6 patients from 4 families (3 German and 1 Norwegian) with pontocerebellar hypoplasia associated with infantile spinal muscular atrophy. The patients presented at birth or within the first 6 months of life with profound hypotonia followed by severely delayed psychomotor development and absent speech. Brain imaging showed cerebellar hypoplasia. In addition, 2 sisters also had a retrocerebellar cyst and another patient had profound pontocerebellar hypoplasia with a hypotrophic brainstem. All patients underwent testing for infantile SMA1 (253300), and homozygous absence of the SMN1 gene (600354) was excluded in all. In a review of these patients, Rudnik-Schoneborn et al. (2013) noted that all but 1 of the children died within the first years of life. One had epilepsy, 2 had infantile seizures, and 3 had nystagmus. </p><p>Wan et al. (2012) reported a family of American and European origin in which 4 brothers had PCH1B. All were hypotonic at birth and showed global developmental delay, without achieving any motor milestones. Although normal in size at birth, they all showed progressive microcephaly and severe growth retardation within the first year. Other features included oculomotor apraxia, progressive muscle wasting, and distal contractures. They never learned to speak. Brain MRI showed marked cerebellar atrophy with prominent sulci and decreased volume of folia. The brainstem and cerebral cortex appeared normal, but were small. The patients were 9, 16, and 18 years at the time of the report; 1 died at age 18 years. Electromyography in 2 patients showed neurogenic changes of denervation and reinnervation consistent with axonal loss. Nerve conduction studies showed impaired motor responses and normal sensory responses. Postmortem examination of 1 patient showed severe loss of cerebellar and spinal motor neurons. </p><p>Schwabova et al. (2013) reported 3 unrelated Czech children of Roma descent with PCH1B. One of the patients had previously been reported by Wan et al. (2012). All presented at birth with severe hypotonia, muscle weakness with areflexia, and sucking difficulties. Two patients had congenital contractures. The infants later showed progressive microcephaly, severe global developmental delay, weak cry, growth retardation, and visual impairment. None had spontaneous antigravity movements; 1 had tongue fasciculations. Brain imaging showed cerebellar hypoplasia, severe hypoplasia of the vermis, and mild hypoplasia of the brainstem. All patients died of respiratory insufficiency before 2 years of age. Postmortem examination of 2 patients showed short cerebellar folia with poor branching, loss of Purkinje cells and neurons in the granular layer, pontine hypoplasia, segmental loss of the inferior olivary nucleus, and loss of motor neurons in the anterior horn cells of the spinal cord. </p><p><strong><em>Clinical Variability</em></strong></p><p>
Zanni et al. (2013) reported 2 sibs, born of unrelated Bangladeshi parents, with a relatively mild form of PCH1B confirmed by genetic analysis (D132A, 606489.0001 and V80F, 606489.0006 in the EXOSC3 gene). Both patients had delayed motor development, difficulty walking, and distal amyotrophy. The older sib had severe spasticity and became wheelchair-bound in his teens; his younger sister retained ambulation with support in her teens. Both had mild to moderate intellectual disability, but the sister was able to attend school. Other features included adducted thumbs, talipes valgus, tongue atrophy, fasciculations, brisk tendon reflexes, and gaze-evoked nystagmus. Brain imaging showed cerebellar atrophy with normal brainstem. Neither patient had hypotonia or microcephaly. The report expanded the phenotypic spectrum associated with EXOSC3 mutations to include hereditary spastic paraplegia. </p><p>Halevy et al. (2014) reported 2 pairs of sibs from a large consanguineous family of Arab origin with a mild form of PCH1B presenting as complicated hereditary spastic paraplegia with variable cognitive impairment. Whole-exome sequencing identified a homozygous missense mutation in the EXOSC3 gene (G191C; 606489.0007) that segregated with the disorder, but functional studies were not performed. The patients were 12 to 21 years of age at the time of the report. All showed delayed motor development with late walking and eventual deterioration of walking ability. All patients had mild cerebellar signs, including nystagmus with or without intention tremor and dysmetria, and brain imaging of all patients showed mild hypoplasia and atrophy of the lower part of the vermis with a normal pons. None had microcephaly or lower motor neuron signs, and spinal imaging was normal. Halevy et al. (2014) emphasized the mild phenotype in these patients. </p>
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<strong>Inheritance</strong>
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<p>The transmission pattern of PCH in the families reported by Wan et al. (2012) is consistent with autosomal recessive inheritance. </p>
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<strong>Molecular Genetics</strong>
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<p>In affected members of 9 families with autosomal recessive pontocerebellar hypoplasia type 1B, Wan et al. (2012) identified homozygous or compound heterozygous mutations in the EXOSC3 gene (see, e.g., 606489.0001-606489.0005). The first mutation was identified by genomewide scan and exome sequencing of a family with 4 affected brothers. One of the patients had been reported by Salman et al. (2003), and 2 by Ryan et al. (2000). The findings indicated that proper RNA processing is important for the development and survival of cerebellar and spinal motor neurons. </p>
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<h4>
<span class="mim-font">
<strong>Genotype/Phenotype Correlations</strong>
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<p>Rudnik-Schoneborn et al. (2013) identified biallelic EXOSC3 mutations in 10 (37%) of 27 families with PCH with spinal muscular atrophy. Seven of the mutation-positive families had previously been reported (Rudnik-Schoneborn et al., 2003; Wan et al., 2012). The most common mutation was D132A (606489.0001), found in 11 (55%) of 20 mutated alleles, and haplotype analysis suggested a founder effect for this mutation. All patients had hypotonia, progressive muscular atrophy, and global developmental delay, but there was variation in the clinical presentation and survival. Individuals homozygous for the D132A mutation had the mildest phenotype; they presented in the first 6 months of life, had preserved respiratory function and cerebellar hypoplasia with a well-structured pons, and survived beyond infancy, even up to 20 years of age in 1 patient. </p><p>Biancheri et al. (2013) reported 2 sets of brothers from 2 unrelated families with PCH1B and spinal anterior horn involvement associated with a homozygous D132A mutation in the EXOSC3 gene. The patients had onset of microcephaly in the first months of life, delayed psychomotor development, and severe axial muscle hypotonia with variable limb hypertonia and extensor plantar responses, but they had prolonged survival compared to some previously reported patients. One 14-year-old patient could walk with support until age 10. None of the patients had seizures. Brain imaging showed isolated cerebellar hypoplasia with normal pontine volume. Biancheri et al. (2013) noted the genotype/phenotype correlation of a comparatively mild form of PCH1B associated with a homozygous D132A mutation. </p><p>Eggens et al. (2014) reported 14 patients from 12 families with PCH1B. Six patients from 5 families, all of Roma descent, carried the same homozygous G31A mutation in EXOSC3 (606489.0004). All of these patients had a severe form of the disorder, with hypotonic paresis at birth, areflexia, variable microcephaly and contractures, and death by 7 months of age. In contrast, 3 patients from 2 Caucasian families who were homozygous for the D132A mutation (606489.0001) showed a milder course, with dyskinesia, dystonia, brisk tendon reflexes in 2, and visual and auditory responses; these children survived until later childhood (up to 12 years of age). Four additional children who were compound heterozygous for D132A and a truncating mutation or a missense mutation had a severe clinical course, with hypotonia at birth, contractures, and death in infancy. Two patients had seizures. Finally, a patient who was homozygous for a G135E mutation had hypotonia, contractures, and no response to external stimuli; he died at age 8 weeks. Brain imaging showed differing patterns of cerebellar atrophy in all patients studied. In addition, 3 patients who were compound heterozygous for D132A and a truncating mutation had cerebellar cysts, while patients homozygous for D132A had a normal pons. Eggens et al. (2014) concluded that homozygosity for the D132A mutation leads to PCH with possible survival into early puberty and preservation of the pons, whereas other mutations cause the more severe phenotype. Functional studies of the variants were not performed. </p>
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<strong>Population Genetics</strong>
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<p>Schwabova et al. (2013) identified a homozygous G31A mutation in the EXOSC3 gene (606489.0004) in 32 unrelated Czech children of Roma descent with PCH1B. The heterozygous mutation was found in 4 (4.4%) of 90 unrelated Roma control individuals, and haplotype analysis suggested a founder effect. The patients had a severe form of the disorder, with death in the first year of life. </p>
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<strong>REFERENCES</strong>
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<li>
<p class="mim-text-font">
Biancheri, R., Cassandrini, D., Pinto, F., Trovato, R., Di Rocco, M., Mirabelli-Badenier, M., Pedemonte, M., Panicucci, C., Trucks, H., Sander, T., Zara, F., Rossi, A., Striano, P., Minetti, C., Santorelli, F. M.
<strong>EXOSC3 mutations in isolated cerebellar hypoplasia and spinal anterior horn involvement.</strong>
J. Neurol. 260: 1866-1870, 2013.
[PubMed: 23564332]
[Full Text: https://doi.org/10.1007/s00415-013-6896-0]
</p>
</li>
<li>
<p class="mim-text-font">
Eggens, V. R. C., Barth, P. G., Niermeijer, J.-M. F., Berg, J. N., Darin, N., Dixit, A., Fluss, J., Foulds, N., Fowler, D., Hortobagyi, T., Jacques, T., King, M. D., and 18 others.
<strong>EXOSC3 mutations in pontocerebellar hypoplasia type 1: novel mutations and genotype-phenotype correlations.</strong>
Orphanet J. Rare Dis. 9: 23, 2014. Note: Electronic Article.
[PubMed: 24524299]
[Full Text: https://doi.org/10.1186/1750-1172-9-23]
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</li>
<li>
<p class="mim-text-font">
Halevy, A., Lerer, I., Cohen, R., Kornreich, L., Shuper, A., Gamliel, M., Zimerman, B.-E., Korabi, I., Meiner, V., Straussberg, R., Lossos, A.
<strong>Novel EXOSC3 mutation causes complicated hereditary spastic paraplegia.</strong>
J. Neurol. 261: 2165-2169, 2014.
[PubMed: 25149867]
[Full Text: https://doi.org/10.1007/s00415-014-7457-x]
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</li>
<li>
<p class="mim-text-font">
Rudnik-Schoneborn, S., Senderek, J., Jen, J. C., Houge, G., Seeman, P., Puchmajerova, A., Graul-Neumann, L., Seidel, U., Korinthenberg, R., Kirschner, J., Seeger, J., Ryan, M. M., and 15 others.
<strong>Pontocerebellar hypoplasia type 1: clinical spectrum and relevance of EXOSC3 mutations.</strong>
Neurology 80: 438-446, 2013.
[PubMed: 23284067]
[Full Text: https://doi.org/10.1212/WNL.0b013e31827f0f66]
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</li>
<li>
<p class="mim-text-font">
Rudnik-Schoneborn, S., Sztriha, L., Aithala, G. R., Houge, G., Laegreid, L. M., Seeger, J., Huppke, M., Wirth, B., Zerres, K.
<strong>Extended phenotype of pontocerebellar hypoplasia with infantile spinal muscular atrophy.</strong>
Am. J. Med. Genet. 117A: 10-17, 2003.
[PubMed: 12548734]
[Full Text: https://doi.org/10.1002/ajmg.a.10863]
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</li>
<li>
<p class="mim-text-font">
Ryan, M. M., Cooke-Yarborough, C. M., Procopis, P. G., Ouvrier, R. A.
<strong>Anterior horn cell disease and olivopontocerebellar hypoplasia.</strong>
Pediat. Neurol. 23: 180-184, 2000.
[PubMed: 11020648]
[Full Text: https://doi.org/10.1016/s0887-8994(00)00166-1]
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</li>
<li>
<p class="mim-text-font">
Salman, M. S., Buncic, J. R., Westall, C. A., Heon, E., Becker, L.
<strong>Pontocerebellar hypoplasia type 1: new leads for an earlier diagnosis. (Letter)</strong>
J. Child Neurol. 18: 220-225, 2003.
[PubMed: 12731647]
[Full Text: https://doi.org/10.1177/08830738030180031201]
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</li>
<li>
<p class="mim-text-font">
Schwabova, J., Brozkova, D. S., Petrak, B., Mojzisova, M., Pavlickova, K., Haberlova, J., Mrazkova, L., Hedvicakova, P., Hornofova, L., Kaluzova, M., Fencl, F., Krutova, M., Zamecnik, J., Seeman, P.
<strong>Homozygous EXOSC3 mutation c.92G-C, p.G31A is a founder mutation causing severe pontocerebellar hypoplasia type 1 among the Czech Roma.</strong>
J. Neurogenet. 27: 163-169, 2013.
[PubMed: 23883322]
[Full Text: https://doi.org/10.3109/01677063.2013.814651]
</p>
</li>
<li>
<p class="mim-text-font">
Wan, J., Yourshaw, M., Mamsa, H., Rudnik-Schoneborn, S., Menezes, M. P., Hong, J. E., Leong, D. W., Senderek, J., Salman, M. S., Chitayat, D., Seeman, P., von Moers, A., and 14 others.
<strong>Mutations in the RNA exosome component gene EXOSC3 cause pontocerebellar hypoplasia and spinal motor neuron degeneration.</strong>
Nature Genet. 44: 704-708, 2012.
[PubMed: 22544365]
[Full Text: https://doi.org/10.1038/ng.2254]
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</li>
<li>
<p class="mim-text-font">
Zanni, G., Scotton, C., Passarelli, C., Fang, M., Barresi, S., Dallapiccola, B., Wu, B., Gualandi, F., Ferlini, A., Bertini, E., Wei, W.
<strong>Exome sequencing in a family with intellectual disability, early onset spasticity, and cerebellar atrophy detects a novel mutation in EXOSC3.</strong>
Neurogenetics 14: 247-250, 2013.
[PubMed: 23975261]
[Full Text: https://doi.org/10.1007/s10048-013-0371-z]
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Cassandra L. Kniffin - updated : 2/18/2015<br>Cassandra L. Kniffin - updated : 12/22/2014<br>Cassandra L. Kniffin - updated : 12/8/2014
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