nih-gov/www.ncbi.nlm.nih.gov/omim/600882

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<title>
Entry
- #600882 - CHARCOT-MARIE-TOOTH DISEASE, AXONAL, TYPE 2B; CMT2B
- OMIM
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<span class="h4">#600882</span>
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<strong>Table of Contents</strong>
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<li role="presentation">
<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/600882"><strong>Clinical Synopsis</strong></a>
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<a href="/phenotypicSeries/PS118220"> <strong>Phenotypic Series</strong> </a>
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<a href="#text"><strong>Text</strong></a>
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<a href="#clinicalFeatures">Clinical Features</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#inheritance">Inheritance</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#mapping">Mapping</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="#nomenclature">Nomenclature</a>
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<li role="presentation">
<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=(CHARCOT-MARIE-TOOTH DISEASE, AXONAL, TYPE) OR (RAB7)" class="mim-tip-hint" title="Clinical Trials" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Clinical Trials', 'domain': 'clinicaltrials.gov'})">Clinical Trials</a></div>
<div><a href="https://www.orpha.net/consor/cgi-bin/ClinicalLabs_Search_Simple.php?lng=EN&LnkId=14509&Typ=Pat" class="mim-tip-hint" title="A list of European laboratories that offer genetic testing." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'EuroGentest', 'domain': 'orpha.net'})">EuroGentest</a></div>
<div><a href="https://www.diseaseinfosearch.org/x/1291" class="mim-tip-hint" title="Network of disease-specific advocacy organizations, universities, private companies, government agencies, and public policy organizations." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Genetic Alliance', 'domain': 'diseaseinfosearch.org'})">Genetic Alliance</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/gtr/all/tests/?term=600882[mim]" class="mim-tip-hint" title="Genetic Testing Registry." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'GTR', 'domain': 'ncbi.nlm.nih.gov'})">GTR</a></div>
<div><a href="https://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&Expert=99936" class="mim-tip-hint" title="European reference portal for information on rare diseases and orphan drugs." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'OrphaNet', 'domain': 'orpha.net'})">OrphaNet</a></div>
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<div style="display: table-cell;">Animal Models</div>
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<div><a href="https://www.alliancegenome.org/disease/DOID:0110159" class="mim-tip-hint" title="Search Across Species; explore model organism and human comparative genomics." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Alliance Genome', 'domain': 'alliancegenome.org'})">Alliance Genome</a></div>
<div><a href="http://www.informatics.jax.org/disease/600882" class="mim-tip-hint" title="Phenotypes, alleles, and disease models from Mouse Genome Informatics." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'MGI Mouse Phenotype', 'domain': 'informatics.jax.org'})">MGI Mouse Phenotype</a></div>
<div><a href="https://wormbase.org/resources/disease/DOID:0110159" class="mim-tip-hint" title="Database of the biology and genome of Caenorhabditis elegans and related nematodes." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Wormbase Disease Ontology', 'domain': 'wormbase.org'})">Wormbase Disease Ontology</a></div>
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</div>
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<span>
<span class="mim-tip-bottom" qtip_title="<strong>Looking for this gene or this phenotype in other resources?</strong>" qtip_text="Select a related resource from the dropdown menu and click for a targeted link to information directly relevant.">
&nbsp;
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<div class="col-lg-8 col-lg-pull-2 col-md-8 col-md-pull-2 col-sm-8 col-sm-pull-2 col-xs-12">
<div>
<a id="title" class="mim-anchor"></a>
<div>
<a id="number" class="mim-anchor"></a>
<div class="text-right">
<a href="#" class="mim-tip-icd" qtip_title="<strong>ICD+</strong>" qtip_text="
<strong>SNOMEDCT:</strong> 717008005<br />
<strong>ORPHA:</strong> 99936<br />
<strong>DO:</strong> 0110159<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>
600882
</span>
</span>
</div>
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<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
CHARCOT-MARIE-TOOTH DISEASE, AXONAL, TYPE 2B; CMT2B
</span>
</h3>
</div>
<div>
<br />
</div>
<div>
<a id="alternativeTitles" class="mim-anchor"></a>
<div>
<p>
<span class="mim-font">
<em>Alternative titles; symbols</em>
</span>
</p>
</div>
<div>
<h4>
<span class="mim-font">
CHARCOT-MARIE-TOOTH DISEASE, AUTOSOMAL DOMINANT, TYPE 2B<br />
CHARCOT-MARIE-TOOTH NEUROPATHY, TYPE 2B<br />
HEREDITARY MOTOR AND SENSORY NEUROPATHY IIB; HMSN2B<br />
HMSN IIB
</span>
</h4>
</div>
</div>
<div>
<br />
</div>
</div>
<div>
<a id="phenotypeMap" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>Phenotype-Gene Relationships</strong>
</span>
</h4>
<div>
<table class="table table-bordered table-condensed table-hover small mim-table-padding">
<thead>
<tr class="active">
<th>
Location
</th>
<th>
Phenotype
</th>
<th>
Phenotype <br /> MIM number
</th>
<th>
Inheritance
</th>
<th>
Phenotype <br /> mapping key
</th>
<th>
Gene/Locus
</th>
<th>
Gene/Locus <br /> MIM number
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/654?start=-3&limit=10&highlight=654">
3q21.3
</a>
</span>
</td>
<td>
<span class="mim-font">
Charcot-Marie-Tooth disease, type 2B
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600882"> 600882 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
RAB7
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602298"> 602298 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
</div>
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<a href="/clinicalSynopsis/600882" class="btn btn-warning" role="button"> Clinical Synopsis </a>
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<a href="/phenotypicSeries/PS118220" class="btn btn-info" role="button"> Phenotypic Series </a>
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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/600882" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/600882" 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 dominant <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/263681008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">263681008</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/771269000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">771269000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0443147&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0443147</a>, <a href="https://bioportal.bioontology.org/search?q=C1867440&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1867440</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000006</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000006</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> SKELETAL </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Feet </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Pes cavus <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/205091006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">205091006</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/36755004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">36755004</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/86900005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">86900005</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q66.7" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q66.7</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/736.73" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">736.73</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/754.71" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">754.71</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0728829&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0728829</a>, <a href="https://bioportal.bioontology.org/search?q=C0039273&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0039273</a>, <a href="https://bioportal.bioontology.org/search?q=C2239098&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2239098</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001761" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001761</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001761" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001761</a>]</span> <a href="https://elementsofmorphology.nih.gov/index.cgi?tid=2ad12e53b20f47e5685234fa29da6610" target="_blank" class="small mim-tip-eom" title="&lt;img src=&quot;https://elementsofmorphology.nih.gov/images/terms/Pes_Cavus-small.jpg&quot;&gt; &lt;br/&gt;Further Information: &lt;a href=&quot;https://elementsofmorphology.nih.gov/index.cgi?tid=2ad12e53b20f47e5685234fa29da6610&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 /> -
Pes planus <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/23407003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">23407003</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/203534009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">203534009</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/53226007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">53226007</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q66.5" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q66.5</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/M21.4" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">M21.4</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/754.61" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">754.61</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/734" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">734</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0016202&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0016202</a>, <a href="https://bioportal.bioontology.org/search?q=C0392477&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0392477</a>, <a href="https://bioportal.bioontology.org/search?q=C0264133&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0264133</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001763" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001763</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001763" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001763</a>]</span> <a href="https://elementsofmorphology.nih.gov/index.cgi?tid=1f893093d35c2d1df583eed57a47b6cb" target="_blank" class="small mim-tip-eom" title="&lt;img src=&quot;https://elementsofmorphology.nih.gov/images/terms/Pes_Planus-small.jpg&quot;&gt; &lt;br/&gt;Further Information: &lt;a href=&quot;https://elementsofmorphology.nih.gov/index.cgi?tid=1f893093d35c2d1df583eed57a47b6cb&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 /> -
Hammer toes <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/122481008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">122481008</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1136179&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1136179</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001765" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001765</a>]</span><br /> -
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 /> -
Foot callus <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/229811005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">229811005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0457978&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0457978</a>]</span><br /> -
Osteomyelitis or necrosis, distal, due to sensory neuropathy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1833221&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1833221</a>]</span><br /> -
Autoamputation <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1833222&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1833222</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001218" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001218</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001218" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001218</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> SKIN, NAILS, & HAIR </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Skin </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Ulcers, distal, due to sensory neuropathy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1833223&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1833223</a>]</span><br /> -
Ulcers often lead to infection and amputation <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1833224&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1833224</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Nails </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Dystrophic toenail changes <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1833225&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1833225</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001810" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001810</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001810" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001810</a>]</span><br />
</span>
</div>
</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> Peripheral Nervous System </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Distal limb muscle weakness due to peripheral neuropathy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1864696&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1864696</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002460" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002460</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002460" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002460</a>]</span> <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/249942005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">249942005</a>]</span><br /> -
Distal limb muscle atrophy due to peripheral neuropathy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1864697&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1864697</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003693" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003693</a>]</span><br /> -
'Steppage' gait <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/27253007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">27253007</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0427149&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0427149</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003376" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003376</a>]</span><br /> -
Foot drop <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/6077001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">6077001</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/735601009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">735601009</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/M21.37" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">M21.37</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C2894499&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2894499</a>, <a href="https://bioportal.bioontology.org/search?q=C0085684&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0085684</a>, <a href="https://bioportal.bioontology.org/search?q=C1866141&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1866141</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0009027" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0009027</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0009027" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0009027</a>]</span><br /> -
Marked distal sensory impairment <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1833220&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1833220</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002936" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002936</a>]</span><br /> -
Hyporeflexia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/835279003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">835279003</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405946002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405946002</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0700078&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0700078</a>, <a href="https://bioportal.bioontology.org/search?q=C0151888&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0151888</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001265" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001265</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0001315" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001315</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001265" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001265</a>]</span><br /> -
Areflexia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/37280007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">37280007</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0234146&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0234146</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001284" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001284</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001284" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001284</a>]</span><br /> -
Normal or mildly decreased motor nerve conduction velocity (NCV) (greater than 38 m/s) <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836492&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836492</a>]</span><br /> -
Axonal atrophy on nerve biopsy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836493&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836493</a>]</span><br /> -
Axonal degeneration/regeneration on nerve biopsy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836494&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836494</a>]</span><br /> -
Small 'onion bulbs' may be present <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836495&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836495</a>]</span><br /> -
Decreased number of myelinated fibers may be found <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836496&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836496</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">
- Peak age of onset in second decade<br /> -
Usually begins in feet and legs (peroneal distribution)<br /> -
May progress to upper limbs<br /> -
Phenotypic overlap with hereditary sensory and autonomic neuropathy type I (HSAN1, <a href="/entry/162400">162400</a>)<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 RAS-associated protein RAB7 (<a href="/entry/602298#0001">602298.0001</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>
Charcot-Marie-Tooth disease
- <a href="/phenotypicSeries/PS118220">PS118220</a>
- 82 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/1/100?start=-3&limit=10&highlight=100"> 1p36.31 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615376"> Charcot-Marie-Tooth disease, recessive intermediate C </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/615376"> 615376 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611101"> PLEKHG5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611101"> 611101 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/135?start=-3&limit=10&highlight=135"> 1p36.22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/118210"> Charcot-Marie-Tooth disease, type 2A1 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/118210"> 118210 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605995"> KIF1B </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605995"> 605995 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/163?start=-3&limit=10&highlight=163"> 1p36.22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601152"> Hereditary motor and sensory neuropathy VIA </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601152"> 601152 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608507"> MFN2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608507"> 608507 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/163?start=-3&limit=10&highlight=163"> 1p36.22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617087"> Charcot-Marie-Tooth disease, axonal, type 2A2B </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/617087"> 617087 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608507"> MFN2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608507"> 608507 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/163?start=-3&limit=10&highlight=163"> 1p36.22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609260"> Charcot-Marie-Tooth disease, axonal, type 2A2A </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609260"> 609260 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608507"> MFN2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608507"> 608507 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/406?start=-3&limit=10&highlight=406"> 1p35.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608323"> Charcot-Marie-Tooth disease, dominant intermediate C </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608323"> 608323 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603623"> YARS1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603623"> 603623 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/954?start=-3&limit=10&highlight=954"> 1p13.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618036"> Charcot-Marie-Tooth disease, axonal, type 2DD </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618036"> 618036 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/182310"> ATP1A1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/182310"> 182310 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/1240?start=-3&limit=10&highlight=1240"> 1q22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605588"> Charcot-Marie-Tooth disease, type 2B1 </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/605588"> 605588 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/150330"> LMNA </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/150330"> 150330 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/1292?start=-3&limit=10&highlight=1292"> 1q23.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619519"> Charcot-Marie-Tooth disease, axonal, type 2FF </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619519"> 619519 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609743"> CADM3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609743"> 609743 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/1348?start=-3&limit=10&highlight=1348"> 1q23.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607791"> Charcot-Marie-Tooth disease, dominant intermediate D </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607791"> 607791 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/159440"> MPZ </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/159440"> 159440 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/1348?start=-3&limit=10&highlight=1348"> 1q23.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607736"> Charcot-Marie-Tooth disease, type 2J </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607736"> 607736 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/159440"> MPZ </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/159440"> 159440 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/1348?start=-3&limit=10&highlight=1348"> 1q23.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/145900"> Dejerine-Sottas disease </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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/145900"> 145900 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/159440"> MPZ </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/159440"> 159440 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/1348?start=-3&limit=10&highlight=1348"> 1q23.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/118200"> Charcot-Marie-Tooth disease, type 1B </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/118200"> 118200 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/159440"> MPZ </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/159440"> 159440 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/1348?start=-3&limit=10&highlight=1348"> 1q23.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607677"> Charcot-Marie-Tooth disease, type 2I </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607677"> 607677 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/159440"> MPZ </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/159440"> 159440 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/2/131?start=-3&limit=10&highlight=131"> 2p23.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618400"> Charcot-Marie-Tooth disease, axonal, type 2EE </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/618400"> 618400 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/137960"> MPV17 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/137960"> 137960 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/654?start=-3&limit=10&highlight=654"> 3q21.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600882"> Charcot-Marie-Tooth disease, type 2B </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600882"> 600882 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602298"> RAB7 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602298"> 602298 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/798?start=-3&limit=10&highlight=798"> 3q25.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617017"> Charcot-Marie-Tooth disease, axonal, type 2T </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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/617017"> 617017 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/120520"> MME </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/120520"> 120520 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/880?start=-3&limit=10&highlight=880"> 3q26.33 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615185"> Charcot-Marie-Tooth disease, dominant intermediate F </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615185"> 615185 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610863"> GNB4 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610863"> 610863 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/4/611?start=-3&limit=10&highlight=611"> 4q31.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615490"> Charcot-Marie-Tooth disease, type 2R </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/615490"> 615490 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614141"> TRIM2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614141"> 614141 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/5/544?start=-3&limit=10&highlight=544"> 5q31.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616625"> Charcot-Marie-Tooth disease, axonal, type 2W </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616625"> 616625 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/142810"> HARS1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/142810"> 142810 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/5/646?start=-3&limit=10&highlight=646"> 5q32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601596"> Charcot-Marie-Tooth disease, type 4C </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/601596"> 601596 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608206"> SH3TC2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608206"> 608206 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/405?start=-3&limit=10&highlight=405"> 6p21.31 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/620111"> Charcot-Marie-Tooth disease, demyelinating, type 1J </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/620111"> 620111 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/147267"> ITPR3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/147267"> 147267 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/769?start=-3&limit=10&highlight=769"> 6q21 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611228"> Charcot-Marie-Tooth disease, type 4J </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/611228"> 611228 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609390"> FIG4 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609390"> 609390 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/7/165?start=-3&limit=10&highlight=165"> 7p14.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601472"> Charcot-Marie-Tooth disease, type 2D </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601472"> 601472 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600287"> GARS1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600287"> 600287 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/7/355?start=-3&limit=10&highlight=355"> 7q11.23 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606595"> Charcot-Marie-Tooth disease, axonal, type 2F </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606595"> 606595 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602195"> HSPB1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602195"> 602195 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/137?start=-3&limit=10&highlight=137"> 8p21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617882"> Charcot-Marie-Tooth disease, dominant intermediate G </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617882"> 617882 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/162280"> NEFL </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/162280"> 162280 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/137?start=-3&limit=10&highlight=137"> 8p21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607684"> Charcot-Marie-Tooth disease, type 2E </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607684"> 607684 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/162280"> NEFL </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/162280"> 162280 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/137?start=-3&limit=10&highlight=137"> 8p21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607734"> Charcot-Marie-Tooth disease, type 1F </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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/607734"> 607734 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/162280"> NEFL </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/162280"> 162280 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/304?start=-3&limit=10&highlight=304"> 8q13-q23 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607731"> Charcot-Marie-Tooth disease, axonal, type 2H </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="2 - The disorder was placed on the map by statistical methods"> 2 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607731"> 607731 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607731"> CMT2H </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607731"> 607731 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/350?start=-3&limit=10&highlight=350"> 8q21.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607831"> {?Charcot-Marie-Tooth disease, axonal, autosomal dominant, type 2K, modifier of} </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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/607831"> 607831 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605266"> JPH1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605266"> 605266 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/351?start=-3&limit=10&highlight=351"> 8q21.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607706"> Charcot-Marie-Tooth disease, axonal, with vocal cord paresis </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/607706"> 607706 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606598"> GDAP1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606598"> 606598 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/351?start=-3&limit=10&highlight=351"> 8q21.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/214400"> Charcot-Marie-Tooth disease, type 4A </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/214400"> 214400 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606598"> GDAP1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606598"> 606598 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/351?start=-3&limit=10&highlight=351"> 8q21.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607831"> Charcot-Marie-Tooth disease, axonal, type 2K </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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/607831"> 607831 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606598"> GDAP1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606598"> 606598 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/351?start=-3&limit=10&highlight=351"> 8q21.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608340"> Charcot-Marie-Tooth disease, recessive intermediate, A </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/608340"> 608340 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606598"> GDAP1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606598"> 606598 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/366?start=-3&limit=10&highlight=366"> 8q21.13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618279"> Charcot-Marie-Tooth disease, demyelinating, type 1G </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618279"> 618279 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/170715"> PMP2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/170715"> 170715 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/570?start=-3&limit=10&highlight=570"> 8q24.22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601455"> Charcot-Marie-Tooth disease, type 4D </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/601455"> 601455 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605262"> NDRG1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605262"> 605262 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/9/160?start=-3&limit=10&highlight=160"> 9p13.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616687"> Charcot-Marie-Tooth disease, type 2Y </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616687"> 616687 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601023"> VCP </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601023"> 601023 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/9/512?start=-3&limit=10&highlight=512"> 9q33.3-q34.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614436"> Charcot-Marie-Tooth disease, axonal, type 2P </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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/614436"> 614436 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610933"> LRSAM1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610933"> 610933 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/9/612?start=-3&limit=10&highlight=612"> 9q34.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616684"> Charcot-Marie-Tooth disease, type 4K </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/616684"> 616684 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/185620"> SURF1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/185620"> 185620 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/53?start=-3&limit=10&highlight=53"> 10p14 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615025"> ?Charcot-Marie-Tooth disease, axonal, type 2Q </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615025"> 615025 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614984"> DHTKD1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614984"> 614984 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/230?start=-3&limit=10&highlight=230"> 10q21.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605253"> Hypomyelinating neuropathy, congenital, 1 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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/605253"> 605253 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/129010"> EGR2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/129010"> 129010 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/230?start=-3&limit=10&highlight=230"> 10q21.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607678"> Charcot-Marie-Tooth disease, type 1D </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607678"> 607678 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/129010"> EGR2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/129010"> 129010 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/230?start=-3&limit=10&highlight=230"> 10q21.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/145900"> Dejerine-Sottas disease </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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/145900"> 145900 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/129010"> EGR2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/129010"> 129010 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/260?start=-3&limit=10&highlight=260"> 10q22.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605285"> Neuropathy, hereditary motor and sensory, Russe type </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/605285"> 605285 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/142600"> HK1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/142600"> 142600 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/513?start=-3&limit=10&highlight=513"> 10q24.32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606483"> Charcot-Marie-Tooth disease, axonal, type 2GG </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606483"> 606483 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603698"> GBF1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603698"> 603698 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/613?start=-3&limit=10&highlight=613"> 10q26.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/621095"> Charcot-Marie-Tooth disease, axonal, type 2JJ </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/621095"> 621095 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603883"> BAG3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603883"> 603883 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/171?start=-3&limit=10&highlight=171"> 11p15.4 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604563"> Charcot-Marie-Tooth disease, type 4B2 </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/604563"> 604563 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607697"> SBF2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607697"> 607697 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/690?start=-3&limit=10&highlight=690"> 11q13.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616155"> Charcot-Marie-Tooth disease, axonal, type 2S </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/616155"> 616155 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600502"> IGHMBP2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600502"> 600502 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/849?start=-3&limit=10&highlight=849"> 11q21 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601382"> Charcot-Marie-Tooth disease, type 4B1 </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/601382"> 601382 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603557"> MTMR2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603557"> 603557 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/278?start=-3&limit=10&highlight=278"> 12p11.21 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609311"> Charcot-Marie-Tooth disease, type 4H </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/609311"> 609311 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611104"> FGD4 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611104"> 611104 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/542?start=-3&limit=10&highlight=542"> 12q13.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616280"> Charcot-Marie-Tooth disease, axonal, type 2U </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616280"> 616280 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/156560"> MARS1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/156560"> 156560 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/757?start=-3&limit=10&highlight=757"> 12q23.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619742"> Charcot-Marie-Tooth disease, demyelinating, type 1I </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619742"> 619742 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614366"> POLR3B </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614366"> 614366 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/793?start=-3&limit=10&highlight=793"> 12q24.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606071"> Hereditary motor and sensory neuropathy, type IIc </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606071"> 606071 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605427"> TRPV4 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605427"> 605427 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/858?start=-3&limit=10&highlight=858"> 12q24.23 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608673"> Charcot-Marie-Tooth disease, axonal, type 2L </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608673"> 608673 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608014"> HSPB8 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608014"> 608014 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/873?start=-3&limit=10&highlight=873"> 12q24.31 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616039"> Charcot-Marie-Tooth disease, recessive intermediate D </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/616039"> 616039 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602072"> COX6A1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602072"> 602072 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/14/464?start=-3&limit=10&highlight=464"> 14q32.12 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619764"> Charcot-Marie-Tooth disease, demyelinating, type 1H </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619764"> 619764 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604580"> FBLN5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604580"> 604580 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/14/559?start=-3&limit=10&highlight=559"> 14q32.31 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614228"> Charcot-Marie-Tooth disease, axonal, type 2O </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614228"> 614228 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600112"> DYNC1H1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600112"> 600112 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/14/590?start=-3&limit=10&highlight=590"> 14q32.33 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614455"> Charcot-Marie-Tooth disease, dominant intermediate E </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614455"> 614455 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610982"> INF2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610982"> 610982 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/15/71?start=-3&limit=10&highlight=71"> 15q14 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/620068"> Charcot-Marie-Tooth disease, axonal, type 2II </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/620068"> 620068 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604878"> SLC12A6 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604878"> 604878 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/15/168?start=-3&limit=10&highlight=168"> 15q21.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616668"> Charcot-Marie-Tooth disease, axonal, type 2X </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/616668"> 616668 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610844"> SPG11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610844"> 610844 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/195?start=-3&limit=10&highlight=195"> 16p13.13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601098"> Charcot-Marie-Tooth disease, type 1C </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601098"> 601098 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603795"> LITAF </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603795"> 603795 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/603?start=-3&limit=10&highlight=603"> 16q22.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613287"> Charcot-Marie-Tooth disease, axonal, type 2N </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613287"> 613287 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601065"> AARS1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601065"> 601065 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/655?start=-3&limit=10&highlight=655"> 16q23.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613641"> ?Charcot-Marie-Tooth disease, recessive intermediate, B </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/613641"> 613641 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601421"> KARS1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601421"> 601421 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/244?start=-3&limit=10&highlight=244"> 17p12 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/145900"> Dejerine-Sottas disease </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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/145900"> 145900 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601097"> PMP22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601097"> 601097 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/244?start=-3&limit=10&highlight=244"> 17p12 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/118300"> Charcot-Marie-Tooth disease, type 1E </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/118300"> 118300 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601097"> PMP22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601097"> 601097 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/244?start=-3&limit=10&highlight=244"> 17p12 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/118220"> Charcot-Marie-Tooth disease, type 1A </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/118220"> 118220 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601097"> PMP22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601097"> 601097 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/579?start=-3&limit=10&highlight=579"> 17q21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616491"> ?Charcot-Marie-Tooth disease, axonal, type 2V </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616491"> 616491 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609701"> NAGLU </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609701"> 609701 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/281?start=-3&limit=10&highlight=281"> 19p13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606482"> Charcot-Marie-Tooth disease, axonal type 2M </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606482"> 606482 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602378"> DNM2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602378"> 602378 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/281?start=-3&limit=10&highlight=281"> 19p13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606482"> Charcot-Marie-Tooth disease, dominant intermediate B </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606482"> 606482 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602378"> DNM2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602378"> 602378 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/702?start=-3&limit=10&highlight=702"> 19q13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614895"> Charcot-Marie-Tooth disease, type 4F </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/614895"> 614895 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605725"> PRX </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605725"> 605725 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/702?start=-3&limit=10&highlight=702"> 19q13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/145900"> Dejerine-Sottas disease </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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/145900"> 145900 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605725"> PRX </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605725"> 605725 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/967?start=-3&limit=10&highlight=967"> 19q13.33 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605589"> ?Charcot-Marie-Tooth disease, type 2B2 </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/605589"> 605589 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605610"> PNKP </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605610"> 605610 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/20/99?start=-3&limit=10&highlight=99"> 20p12.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619574"> Charcot-Marie-Tooth disease, axonal, type 2HH </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619574"> 619574 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601920"> JAG1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601920"> 601920 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/22/152?start=-3&limit=10&highlight=152"> 22q12.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616924"> Charcot-Marie-Tooth disease, axonal, type 2CC </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616924"> 616924 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/162230"> NEFH </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/162230"> 162230 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/22/177?start=-3&limit=10&highlight=177"> 22q12.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616688"> Charcot-Marie-Tooth disease, axonal, type 2Z </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616688"> 616688 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616661"> MORC2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616661"> 616661 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/22/412?start=-3&limit=10&highlight=412"> 22q13.33 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615284"> Charcot-Marie-Tooth disease, type 4B3 </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/615284"> 615284 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603560"> SBF1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603560"> 603560 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/X/47?start=-3&limit=10&highlight=47"> Xp22.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/302801"> Charcot-Marie-Tooth neuropathy, X-linked recessive, 2 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="X-linked recessive">XLR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="2 - The disorder was placed on the map by statistical methods"> 2 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/302801"> 302801 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/302801"> CMTX2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/302801"> 302801 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/X/126?start=-3&limit=10&highlight=126"> Xp22.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/300905"> ?Charcot-Marie-Tooth disease, X-linked dominant, 6 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="X-linked dominant">XLD</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/300905"> 300905 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/300906"> PDK3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/300906"> 300906 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/X/406?start=-3&limit=10&highlight=406"> Xq13.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/302800"> Charcot-Marie-Tooth neuropathy, X-linked dominant, 1 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="X-linked dominant">XLD</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/302800"> 302800 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/304040"> GJB1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/304040"> 304040 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/X/552?start=-3&limit=10&highlight=552"> Xq22.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/311070"> Charcot-Marie-Tooth disease, X-linked recessive, 5 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="X-linked recessive">XLR</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/311070"> 311070 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/311850"> PRPS1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/311850"> 311850 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/X/662?start=-3&limit=10&highlight=662"> Xq26 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/302802"> Charcot-Marie-Tooth neuropathy, X-linked recessive, 3 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="X-linked recessive">XLR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="4 - A contiguous gene duplication or deletion syndrome in which multiple genes are involved"> 4 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/302802"> 302802 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/302802"> CMTX3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/302802"> 302802 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/X/675?start=-3&limit=10&highlight=675"> Xq26.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/310490"> Cowchock syndrome </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="X-linked recessive">XLR</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/310490"> 310490 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/300169"> AIFM1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/300169"> 300169 </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>
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</h4>
<div id="mimTextFold" class="collapse in ">
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<p>A number sign (#) is used with this entry because Charcot-Marie-Tooth disease type 2B (CMT2B) is caused by heterozygous mutation in the RAB7 gene (<a href="/entry/602298">602298</a>) on chromosome 3q21.</p><p>For a phenotypic description and a discussion of genetic heterogeneity of axonal CMT, see CMT2A1 (<a href="/entry/118210">118210</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>
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<p>In a single large kindred with an autosomal dominant peripheral sensory neuropathy, <a href="#6" class="mim-tip-reference" title="Kwon, J. M., Elliott, J. L., Yee, W.-C., Ivanovich, J., Scavarda, N. &lt;strong&gt;Charcot-Marie-Tooth type II locus to chromosome 3q.&lt;/strong&gt; Am. J. Hum. Genet. 57: 853-858, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7573046/&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;7573046&lt;/a&gt;]" pmid="7573046">Kwon et al. (1995)</a> demonstrated linkage of the disorder to the interval between microsatellite markers D3S1769 and D3S1744. <a href="#6" class="mim-tip-reference" title="Kwon, J. M., Elliott, J. L., Yee, W.-C., Ivanovich, J., Scavarda, N. &lt;strong&gt;Charcot-Marie-Tooth type II locus to chromosome 3q.&lt;/strong&gt; Am. J. Hum. Genet. 57: 853-858, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7573046/&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;7573046&lt;/a&gt;]" pmid="7573046">Kwon et al. (1995)</a> considered this to be a form of Charcot-Marie-Tooth disease, which they designated CMT2B. They noted that genetic studies of CMT2 are more complicated than those in CMT1 because of difficulties in establishing the diagnosis. Whereas in CMT1 both the clinical and the electrophysiologic findings of nerve conduction are present early in life, CMT2 often has its onset later in life and the neuropathic findings are those seen in common disorders such as diabetes mellitus or toxic exposures. Diagnosis of CMT2 relies not on a single test but on the combination of clinical history and medical examination by appropriate physical and electrodiagnostic studies. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7573046" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#4" class="mim-tip-reference" title="Houlden, H., King, R. H. M., Muddle, J. R., Warner, T. T., Reilly, M. M., Orrell, R. W., Ginsberg, L. &lt;strong&gt;A novel RAB7 mutation associated with ulcero-mutilating neuropathy.&lt;/strong&gt; Ann. Neurol. 56: 586-590, 2004.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/15455439/&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;15455439&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/ana.20281&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="15455439">Houlden et al. (2004)</a> reported a family with an autosomal dominant ulcero-mutilating neuropathy affecting 3 individuals over 3 generations. The proband was a 56-year-old man who developed a painful ulcer on the left sole at age 16 years. The lesion never healed, and he had numerous operations on his foot, including amputation of the second digit. He later developed progressive right foot pain with swelling and deformity. Other features included mild scoliosis, absent ankle reflexes, decreased distal sensation, lateral-gaze nystagmus, and cerebellar degeneration on MRI. The patient also reported spontaneous lancinating pain in the left foot. Muscle tone, power, and coordination were normal. Nerve conduction studies and sural nerve biopsy showed a chronic sensory axonal neuropathy with axonal degeneration and prominent regeneration. Genetic studies identified a heterozygous mutation in the RAB7 gene (<a href="/entry/602298#0003">602298.0003</a>). <a href="#4" class="mim-tip-reference" title="Houlden, H., King, R. H. M., Muddle, J. R., Warner, T. T., Reilly, M. M., Orrell, R. W., Ginsberg, L. &lt;strong&gt;A novel RAB7 mutation associated with ulcero-mutilating neuropathy.&lt;/strong&gt; Ann. Neurol. 56: 586-590, 2004.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/15455439/&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;15455439&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/ana.20281&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="15455439">Houlden et al. (2004)</a> commented that the findings expanded the phenotypic spectrum of CMT2B; in particular, the lack of motor symptoms and lancinating pain were suggestive of HSAN1. In addition, there was evidence of central nervous system involvement with nystagmus and cerebellar atrophy. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=15455439" 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>
</span>
<div>
<br />
</div>
</div>
<div>
<a id="inheritance" class="mim-anchor"></a>
<h4 href="#mimInheritanceFold" id="mimInheritanceToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimInheritanceToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
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<strong>Inheritance</strong>
</span>
</h4>
</div>
<div id="mimInheritanceFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p>The transmission pattern of CMT2B in the families reported by <a href="#10" class="mim-tip-reference" title="Verhoeven, K., De Jonghe, P., Coen, K., Verpoorten, N., Auer-Grumbach, M., Kwon, J. M., FitzPatrick, D., Schmedding, E., De Vriendt, E., Jacobs, A., Van Gerwen, V., Wagner, K., Hartung, H.-P., Timmerman, V. &lt;strong&gt;Mutations in the small GTP-ase late endosomal protein RAB7 cause Charcot-Marie-Tooth type 2B neuropathy.&lt;/strong&gt; Am. J. Hum. Genet. 72: 722-727, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12545426/&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;12545426&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=12545426[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1086/367847&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="12545426">Verhoeven et al. (2003)</a> was consistent with autosomal dominant inheritance. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12545426" 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>The heterozygous mutation in the RAB7 gene that was identified in a patient with CMT2B by <a href="#7" class="mim-tip-reference" title="Meggouh, F., Bienfait, H. M. E., Weterman, M. A. J., de Visser, M., Baas, F. &lt;strong&gt;Charcot-Marie-Tooth disease due to a de novo mutation of the RAB7 gene.&lt;/strong&gt; Neurology 67: 1476-1478, 2006.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/17060578/&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;17060578&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1212/01.wnl.0000240068.21499.f5&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="17060578">Meggouh et al. (2006)</a> occurred de novo. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=17060578" 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>
</span>
<div>
<br />
</div>
</div>
<div>
<a id="mapping" class="mim-anchor"></a>
<h4 href="#mimMappingFold" id="mimMappingToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimMappingToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Mapping</strong>
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</h4>
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<div id="mimMappingFold" class="collapse in mimTextToggleFold">
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<p><a href="#1" class="mim-tip-reference" title="Auer-Grumbach, M., De Jonghe, P., Wagner, K., Verhoeven, K., Hartung, H.-P., Timmerman, V. &lt;strong&gt;Phenotype-genotype correlations in a CMT2B family with refined 3q13-q22 locus.&lt;/strong&gt; Neurology 55: 1552-1557, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11094113/&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;11094113&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1212/wnl.55.10.1552&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="11094113">Auer-Grumbach et al. (2000)</a> studied a large Austrian family with typical features of CMT2B, including prominent large and small fiber sensory loss and distal muscle weakness and atrophy. Linkage analysis from 19 family members refined the localization of the CMT2B locus to a 10-cM interval on chromosome 3q13-q22 between markers D3S1589 and D3S1549. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11094113" 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>Genetic Heterogeneity</em></strong></p><p>
<a href="#2" class="mim-tip-reference" title="Auer-Grumbach, M., Wagner, K., Timmerman, V., De Jonghe, P., Hartung, H.-P. &lt;strong&gt;Ulcero-mutilating neuropathy in an Austrian kinship without linkage to hereditary motor and sensory neuropathy IIB and hereditary sensory neuropathy I loci.&lt;/strong&gt; Neurology 54: 45-52, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10636124/&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;10636124&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1212/wnl.54.1.45&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="10636124">Auer-Grumbach et al. (2000)</a> reported a second large Austrian family with an autosomal dominant ulcero-mutilating neuropathy that did not show linkage to the CMT2B locus on 3q13-q22 or the HSAN1 locus on 9q22. There were 12 definitely affected members and 16 probably affected members spanning 5 generations. Age at onset ranged from 15 to 30 years, and clinical severity was variable. The most common feature was distal sensory loss affecting all modalities, resulting in foot calluses and poorly healing ulcers leading to osteomyelitis and autoamputation. Some patients had early foot deformities such as pes cavus, pes planus, and hammertoes. Spontaneous shooting or lancinating pain was never observed. Only a few older patients had distal weakness and atrophy in the lower limbs. Motor and sensory nerve conduction velocities (NCVs) were normal or moderately decreased, suggesting axonal degeneration. In a follow-up report of this family (referred to as CMT126), <a href="#10" class="mim-tip-reference" title="Verhoeven, K., De Jonghe, P., Coen, K., Verpoorten, N., Auer-Grumbach, M., Kwon, J. M., FitzPatrick, D., Schmedding, E., De Vriendt, E., Jacobs, A., Van Gerwen, V., Wagner, K., Hartung, H.-P., Timmerman, V. &lt;strong&gt;Mutations in the small GTP-ase late endosomal protein RAB7 cause Charcot-Marie-Tooth type 2B neuropathy.&lt;/strong&gt; Am. J. Hum. Genet. 72: 722-727, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12545426/&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;12545426&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=12545426[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1086/367847&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="12545426">Verhoeven et al. (2003)</a> determined that a small branch of CMT126 was related to the Austrian family with CMT2B reported by <a href="#1" class="mim-tip-reference" title="Auer-Grumbach, M., De Jonghe, P., Wagner, K., Verhoeven, K., Hartung, H.-P., Timmerman, V. &lt;strong&gt;Phenotype-genotype correlations in a CMT2B family with refined 3q13-q22 locus.&lt;/strong&gt; Neurology 55: 1552-1557, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11094113/&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;11094113&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1212/wnl.55.10.1552&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="11094113">Auer-Grumbach et al. (2000)</a> (referred to as CMT140). <a href="https://pubmed.ncbi.nlm.nih.gov/?term=12545426+10636124+11094113" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="molecularGenetics" class="mim-anchor"></a>
<h4 href="#mimMolecularGeneticsFold" id="mimMolecularGeneticsToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimMolecularGeneticsToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
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<strong>Molecular Genetics</strong>
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<p><a href="#10" class="mim-tip-reference" title="Verhoeven, K., De Jonghe, P., Coen, K., Verpoorten, N., Auer-Grumbach, M., Kwon, J. M., FitzPatrick, D., Schmedding, E., De Vriendt, E., Jacobs, A., Van Gerwen, V., Wagner, K., Hartung, H.-P., Timmerman, V. &lt;strong&gt;Mutations in the small GTP-ase late endosomal protein RAB7 cause Charcot-Marie-Tooth type 2B neuropathy.&lt;/strong&gt; Am. J. Hum. Genet. 72: 722-727, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12545426/&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;12545426&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=12545426[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1086/367847&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="12545426">Verhoeven et al. (2003)</a> performed molecular genetic study of 2 families with an ulcero-mutilating phenotype, which were previously linked to the CMT2B locus: an American family of <a href="#6" class="mim-tip-reference" title="Kwon, J. M., Elliott, J. L., Yee, W.-C., Ivanovich, J., Scavarda, N. &lt;strong&gt;Charcot-Marie-Tooth type II locus to chromosome 3q.&lt;/strong&gt; Am. J. Hum. Genet. 57: 853-858, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7573046/&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;7573046&lt;/a&gt;]" pmid="7573046">Kwon et al. (1995)</a> and a Scottish family of <a href="#3" class="mim-tip-reference" title="De Jonghe, P., Timmerman, V., FitzPatrick, D., Spoelders, P., Martin, J.-J., Van Broeckhoven, C. &lt;strong&gt;Mutilating neuropathic ulcerations in a chromosome 3q13-q22 linked Charcot-Marie-Tooth disease type 2B family.&lt;/strong&gt; J. Neurol. Neurosurg. Psychiat. 62: 570-573, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9219740/&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;9219740&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1136/jnnp.62.6.570&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="9219740">De Jonghe et al. (1997)</a>. They refined the CMT2B locus to a 2.5-cM region and reported a missense mutation in the RAB7 gene (<a href="/entry/602298#0002">602298.0002</a>). In affected members of the Austrian family CMT140 reported by <a href="#1" class="mim-tip-reference" title="Auer-Grumbach, M., De Jonghe, P., Wagner, K., Verhoeven, K., Hartung, H.-P., Timmerman, V. &lt;strong&gt;Phenotype-genotype correlations in a CMT2B family with refined 3q13-q22 locus.&lt;/strong&gt; Neurology 55: 1552-1557, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11094113/&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;11094113&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1212/wnl.55.10.1552&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="11094113">Auer-Grumbach et al. (2000)</a> and affected members of a small branch of another Austrian family CMT126 reported by <a href="#2" class="mim-tip-reference" title="Auer-Grumbach, M., Wagner, K., Timmerman, V., De Jonghe, P., Hartung, H.-P. &lt;strong&gt;Ulcero-mutilating neuropathy in an Austrian kinship without linkage to hereditary motor and sensory neuropathy IIB and hereditary sensory neuropathy I loci.&lt;/strong&gt; Neurology 54: 45-52, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10636124/&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;10636124&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1212/wnl.54.1.45&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="10636124">Auer-Grumbach et al. (2000)</a>, <a href="#10" class="mim-tip-reference" title="Verhoeven, K., De Jonghe, P., Coen, K., Verpoorten, N., Auer-Grumbach, M., Kwon, J. M., FitzPatrick, D., Schmedding, E., De Vriendt, E., Jacobs, A., Van Gerwen, V., Wagner, K., Hartung, H.-P., Timmerman, V. &lt;strong&gt;Mutations in the small GTP-ase late endosomal protein RAB7 cause Charcot-Marie-Tooth type 2B neuropathy.&lt;/strong&gt; Am. J. Hum. Genet. 72: 722-727, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12545426/&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;12545426&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=12545426[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1086/367847&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="12545426">Verhoeven et al. (2003)</a> identified the same mutation in the RAB7 gene (<a href="/entry/602298#0001">602298.0001</a>). However, the remaining affected members of family CMT126 did not share the RAB7 mutation and were excluded by linkage analysis from the CMT2B locus, indicating genetic heterogeneity. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=11094113+10636124+9219740+7573046+12545426" 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="Meggouh, F., Bienfait, H. M. E., Weterman, M. A. J., de Visser, M., Baas, F. &lt;strong&gt;Charcot-Marie-Tooth disease due to a de novo mutation of the RAB7 gene.&lt;/strong&gt; Neurology 67: 1476-1478, 2006.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/17060578/&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;17060578&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1212/01.wnl.0000240068.21499.f5&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="17060578">Meggouh et al. (2006)</a> identified a de novo heterozygous missense mutation in the RAB7 gene (<a href="/entry/602298#0004">602298.0004</a>) in a 32-year-old man with CMT2B. He had onset of decreased sensation in the feet leading to small injuries at age 12 years. At age 32, he had steppage gait, atrophy of the lower legs and hand muscles, high-arched feet, claw toes, and decreased sensation in the lower limbs. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=17060578" 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="nomenclature" class="mim-anchor"></a>
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<strong>Nomenclature</strong>
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<p><a href="#9" class="mim-tip-reference" title="Vance, J. M., Speer, M. C., Stajich, J. M., West, S., Wolpert, C., Gaskell, P., Lennon, F., Tim, R. M., Rozear, M., Ben Othmane, K., Pericak-Vance, M. A. &lt;strong&gt;Misclassification and linkage of hereditary sensory and autonomic neuropathy type 1 as Charcot-Marie-Tooth disease, type 2B. (Letter)&lt;/strong&gt; Am. J. Hum. Genet. 59: 258-260, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8659534/&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;8659534&lt;/a&gt;]" pmid="8659534">Vance et al. (1996)</a> found that this phenotype was not compatible with that in the CMT2 families they had observed and concluded that it should not be included in the same disease CMT2 classification, which typically has more motor involvement. <a href="#9" class="mim-tip-reference" title="Vance, J. M., Speer, M. C., Stajich, J. M., West, S., Wolpert, C., Gaskell, P., Lennon, F., Tim, R. M., Rozear, M., Ben Othmane, K., Pericak-Vance, M. A. &lt;strong&gt;Misclassification and linkage of hereditary sensory and autonomic neuropathy type 1 as Charcot-Marie-Tooth disease, type 2B. (Letter)&lt;/strong&gt; Am. J. Hum. Genet. 59: 258-260, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8659534/&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;8659534&lt;/a&gt;]" pmid="8659534">Vance et al. (1996)</a> suggested that it would better into the classification of hereditary autonomic and sensory neuropathy type 1 (HSAN1; <a href="/entry/162400">162400</a>). <a href="#8" class="mim-tip-reference" title="Pericak-Vance, M. A., Speer, M. C., Lennon, F., West, S. G., Menold, M. M., Stajich, J. M., Wolpert, C. M., Slotterbeck, B. D., Saito, M., Tim, R. W., Rozear, M. P., Middleton, L. T., Tsuji, S., Vance, J. M. &lt;strong&gt;Confirmation of a second locus for CMT2 and evidence for additional genetic heterogeneity.&lt;/strong&gt; Neurogenetics 1: 89-93, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10732809/&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;10732809&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s100480050013&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="10732809">Pericak-Vance et al. (1997)</a> commented that the family reported by <a href="#6" class="mim-tip-reference" title="Kwon, J. M., Elliott, J. L., Yee, W.-C., Ivanovich, J., Scavarda, N. &lt;strong&gt;Charcot-Marie-Tooth type II locus to chromosome 3q.&lt;/strong&gt; Am. J. Hum. Genet. 57: 853-858, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7573046/&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;7573046&lt;/a&gt;]" pmid="7573046">Kwon et al. (1995)</a> and labeled CMT2B had a predominantly sensory neuropathy, with a motor component. Affected members commonly had ulcerations and amputations. Likewise, <a href="#5" class="mim-tip-reference" title="Kok, C., Kennerson, M. L., Spring, P. J., Ing, A. J., Pollard, J. D., Nicholson, G. A. &lt;strong&gt;A locus for hereditary sensory neuropathy with cough and gastroesophageal reflux on chromosome 3p22-p24.&lt;/strong&gt; Am. J. Hum. Genet. 73: 632-637, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12870133/&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;12870133&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=12870133[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1086/377591&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="12870133">Kok et al. (2003)</a> suggested that because of the severe sensory impairment and foot ulcers, the disorder should be considered to be a hereditary sensory neuropathy (HSN) and used the designation hereditary motor sensory neuropathy type IIB (HMSN2B). <a href="https://pubmed.ncbi.nlm.nih.gov/?term=10732809+8659534+12870133+7573046" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="references"class="mim-anchor"></a>
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<strong>REFERENCES</strong>
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<a id="1" class="mim-anchor"></a>
<a id="Auer-Grumbach2000" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Auer-Grumbach, M., De Jonghe, P., Wagner, K., Verhoeven, K., Hartung, H.-P., Timmerman, V.
<strong>Phenotype-genotype correlations in a CMT2B family with refined 3q13-q22 locus.</strong>
Neurology 55: 1552-1557, 2000.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11094113/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11094113</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11094113" 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.55.10.1552" target="_blank">Full Text</a>]
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<a id="2" class="mim-anchor"></a>
<a id="Auer-Grumbach2000" class="mim-anchor"></a>
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<p class="mim-text-font">
Auer-Grumbach, M., Wagner, K., Timmerman, V., De Jonghe, P., Hartung, H.-P.
<strong>Ulcero-mutilating neuropathy in an Austrian kinship without linkage to hereditary motor and sensory neuropathy IIB and hereditary sensory neuropathy I loci.</strong>
Neurology 54: 45-52, 2000.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10636124/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10636124</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10636124" 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.54.1.45" target="_blank">Full Text</a>]
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<a id="De Jonghe1997" class="mim-anchor"></a>
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De Jonghe, P., Timmerman, V., FitzPatrick, D., Spoelders, P., Martin, J.-J., Van Broeckhoven, C.
<strong>Mutilating neuropathic ulcerations in a chromosome 3q13-q22 linked Charcot-Marie-Tooth disease type 2B family.</strong>
J. Neurol. Neurosurg. Psychiat. 62: 570-573, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9219740/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9219740</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9219740" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1136/jnnp.62.6.570" target="_blank">Full Text</a>]
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<a id="Houlden2004" class="mim-anchor"></a>
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Houlden, H., King, R. H. M., Muddle, J. R., Warner, T. T., Reilly, M. M., Orrell, R. W., Ginsberg, L.
<strong>A novel RAB7 mutation associated with ulcero-mutilating neuropathy.</strong>
Ann. Neurol. 56: 586-590, 2004.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/15455439/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">15455439</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=15455439" 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/ana.20281" target="_blank">Full Text</a>]
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<a id="Kok2003" class="mim-anchor"></a>
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Kok, C., Kennerson, M. L., Spring, P. J., Ing, A. J., Pollard, J. D., Nicholson, G. A.
<strong>A locus for hereditary sensory neuropathy with cough and gastroesophageal reflux on chromosome 3p22-p24.</strong>
Am. J. Hum. Genet. 73: 632-637, 2003.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12870133/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12870133</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=12870133[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=12870133" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1086/377591" target="_blank">Full Text</a>]
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<a id="Kwon1995" class="mim-anchor"></a>
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Kwon, J. M., Elliott, J. L., Yee, W.-C., Ivanovich, J., Scavarda, N.
<strong>Charcot-Marie-Tooth type II locus to chromosome 3q.</strong>
Am. J. Hum. Genet. 57: 853-858, 1995.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7573046/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7573046</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7573046" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
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<a id="7" class="mim-anchor"></a>
<a id="Meggouh2006" class="mim-anchor"></a>
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Meggouh, F., Bienfait, H. M. E., Weterman, M. A. J., de Visser, M., Baas, F.
<strong>Charcot-Marie-Tooth disease due to a de novo mutation of the RAB7 gene.</strong>
Neurology 67: 1476-1478, 2006.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/17060578/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">17060578</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=17060578" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1212/01.wnl.0000240068.21499.f5" target="_blank">Full Text</a>]
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<a id="8" class="mim-anchor"></a>
<a id="Pericak-Vance1997" class="mim-anchor"></a>
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Pericak-Vance, M. A., Speer, M. C., Lennon, F., West, S. G., Menold, M. M., Stajich, J. M., Wolpert, C. M., Slotterbeck, B. D., Saito, M., Tim, R. W., Rozear, M. P., Middleton, L. T., Tsuji, S., Vance, J. M.
<strong>Confirmation of a second locus for CMT2 and evidence for additional genetic heterogeneity.</strong>
Neurogenetics 1: 89-93, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10732809/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10732809</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10732809" 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/s100480050013" target="_blank">Full Text</a>]
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<a id="9" class="mim-anchor"></a>
<a id="Vance1996" class="mim-anchor"></a>
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Vance, J. M., Speer, M. C., Stajich, J. M., West, S., Wolpert, C., Gaskell, P., Lennon, F., Tim, R. M., Rozear, M., Ben Othmane, K., Pericak-Vance, M. A.
<strong>Misclassification and linkage of hereditary sensory and autonomic neuropathy type 1 as Charcot-Marie-Tooth disease, type 2B. (Letter)</strong>
Am. J. Hum. Genet. 59: 258-260, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8659534/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8659534</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8659534" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
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<a id="10" class="mim-anchor"></a>
<a id="Verhoeven2003" class="mim-anchor"></a>
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Verhoeven, K., De Jonghe, P., Coen, K., Verpoorten, N., Auer-Grumbach, M., Kwon, J. M., FitzPatrick, D., Schmedding, E., De Vriendt, E., Jacobs, A., Van Gerwen, V., Wagner, K., Hartung, H.-P., Timmerman, V.
<strong>Mutations in the small GTP-ase late endosomal protein RAB7 cause Charcot-Marie-Tooth type 2B neuropathy.</strong>
Am. J. Hum. Genet. 72: 722-727, 2003.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12545426/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12545426</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=12545426[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=12545426" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1086/367847" target="_blank">Full Text</a>]
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Cassandra L. Kniffin - updated : 8/29/2007
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Cassandra L. Kniffin - updated : 5/3/2006<br>Cassandra L. Kniffin - updated : 11/30/2004<br>Victor A. McKusick - updated : 9/5/2003<br>Victor A. McKusick - updated : 2/26/2003<br>Kathryn R. Wagner - updated : 5/10/2001<br>Victor A. McKusick - updated : 5/5/1998
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Victor A. McKusick : 10/19/1995
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alopez : 10/21/2024
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alopez : 10/21/2024<br>carol : 10/19/2023<br>carol : 10/18/2023<br>carol : 09/14/2016<br>carol : 05/18/2016<br>carol : 5/17/2016<br>alopez : 11/16/2011<br>terry : 11/10/2011<br>ckniffin : 3/11/2010<br>wwang : 9/12/2007<br>ckniffin : 8/29/2007<br>wwang : 5/17/2006<br>ckniffin : 5/16/2006<br>ckniffin : 5/3/2006<br>mgross : 3/15/2005<br>tkritzer : 12/7/2004<br>ckniffin : 11/30/2004<br>ckniffin : 5/12/2004<br>alopez : 11/6/2003<br>alopez : 9/9/2003<br>terry : 9/5/2003<br>carol : 4/29/2003<br>ckniffin : 4/24/2003<br>ckniffin : 4/10/2003<br>ckniffin : 4/10/2003<br>alopez : 2/27/2003<br>terry : 2/26/2003<br>cwells : 5/11/2001<br>cwells : 5/10/2001<br>cwells : 5/10/2001<br>carol : 2/7/2001<br>carol : 2/5/2001<br>carol : 9/29/1999<br>dholmes : 7/2/1998<br>carol : 5/12/1998<br>terry : 5/5/1998<br>mark : 3/5/1996<br>mimadm : 11/3/1995<br>mark : 10/19/1995
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<strong>#</strong> 600882
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CHARCOT-MARIE-TOOTH DISEASE, AXONAL, TYPE 2B; CMT2B
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<em>Alternative titles; symbols</em>
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CHARCOT-MARIE-TOOTH DISEASE, AUTOSOMAL DOMINANT, TYPE 2B<br />
CHARCOT-MARIE-TOOTH NEUROPATHY, TYPE 2B<br />
HEREDITARY MOTOR AND SENSORY NEUROPATHY IIB; HMSN2B<br />
HMSN IIB
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<strong>SNOMEDCT:</strong> 717008005; &nbsp;
<strong>ORPHA:</strong> 99936; &nbsp;
<strong>DO:</strong> 0110159; &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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3q21.3
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Charcot-Marie-Tooth disease, type 2B
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600882
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Autosomal dominant
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3
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RAB7
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602298
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because Charcot-Marie-Tooth disease type 2B (CMT2B) is caused by heterozygous mutation in the RAB7 gene (602298) on chromosome 3q21.</p><p>For a phenotypic description and a discussion of genetic heterogeneity of axonal CMT, see CMT2A1 (118210).</p>
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<strong>Clinical Features</strong>
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<p>In a single large kindred with an autosomal dominant peripheral sensory neuropathy, Kwon et al. (1995) demonstrated linkage of the disorder to the interval between microsatellite markers D3S1769 and D3S1744. Kwon et al. (1995) considered this to be a form of Charcot-Marie-Tooth disease, which they designated CMT2B. They noted that genetic studies of CMT2 are more complicated than those in CMT1 because of difficulties in establishing the diagnosis. Whereas in CMT1 both the clinical and the electrophysiologic findings of nerve conduction are present early in life, CMT2 often has its onset later in life and the neuropathic findings are those seen in common disorders such as diabetes mellitus or toxic exposures. Diagnosis of CMT2 relies not on a single test but on the combination of clinical history and medical examination by appropriate physical and electrodiagnostic studies. </p><p>Houlden et al. (2004) reported a family with an autosomal dominant ulcero-mutilating neuropathy affecting 3 individuals over 3 generations. The proband was a 56-year-old man who developed a painful ulcer on the left sole at age 16 years. The lesion never healed, and he had numerous operations on his foot, including amputation of the second digit. He later developed progressive right foot pain with swelling and deformity. Other features included mild scoliosis, absent ankle reflexes, decreased distal sensation, lateral-gaze nystagmus, and cerebellar degeneration on MRI. The patient also reported spontaneous lancinating pain in the left foot. Muscle tone, power, and coordination were normal. Nerve conduction studies and sural nerve biopsy showed a chronic sensory axonal neuropathy with axonal degeneration and prominent regeneration. Genetic studies identified a heterozygous mutation in the RAB7 gene (602298.0003). Houlden et al. (2004) commented that the findings expanded the phenotypic spectrum of CMT2B; in particular, the lack of motor symptoms and lancinating pain were suggestive of HSAN1. In addition, there was evidence of central nervous system involvement with nystagmus and cerebellar atrophy. </p>
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<strong>Inheritance</strong>
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<p>The transmission pattern of CMT2B in the families reported by Verhoeven et al. (2003) was consistent with autosomal dominant inheritance. </p><p>The heterozygous mutation in the RAB7 gene that was identified in a patient with CMT2B by Meggouh et al. (2006) occurred de novo. </p>
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<strong>Mapping</strong>
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<p>Auer-Grumbach et al. (2000) studied a large Austrian family with typical features of CMT2B, including prominent large and small fiber sensory loss and distal muscle weakness and atrophy. Linkage analysis from 19 family members refined the localization of the CMT2B locus to a 10-cM interval on chromosome 3q13-q22 between markers D3S1589 and D3S1549. </p><p><strong><em>Genetic Heterogeneity</em></strong></p><p>
Auer-Grumbach et al. (2000) reported a second large Austrian family with an autosomal dominant ulcero-mutilating neuropathy that did not show linkage to the CMT2B locus on 3q13-q22 or the HSAN1 locus on 9q22. There were 12 definitely affected members and 16 probably affected members spanning 5 generations. Age at onset ranged from 15 to 30 years, and clinical severity was variable. The most common feature was distal sensory loss affecting all modalities, resulting in foot calluses and poorly healing ulcers leading to osteomyelitis and autoamputation. Some patients had early foot deformities such as pes cavus, pes planus, and hammertoes. Spontaneous shooting or lancinating pain was never observed. Only a few older patients had distal weakness and atrophy in the lower limbs. Motor and sensory nerve conduction velocities (NCVs) were normal or moderately decreased, suggesting axonal degeneration. In a follow-up report of this family (referred to as CMT126), Verhoeven et al. (2003) determined that a small branch of CMT126 was related to the Austrian family with CMT2B reported by Auer-Grumbach et al. (2000) (referred to as CMT140). </p>
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<strong>Molecular Genetics</strong>
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<p>Verhoeven et al. (2003) performed molecular genetic study of 2 families with an ulcero-mutilating phenotype, which were previously linked to the CMT2B locus: an American family of Kwon et al. (1995) and a Scottish family of De Jonghe et al. (1997). They refined the CMT2B locus to a 2.5-cM region and reported a missense mutation in the RAB7 gene (602298.0002). In affected members of the Austrian family CMT140 reported by Auer-Grumbach et al. (2000) and affected members of a small branch of another Austrian family CMT126 reported by Auer-Grumbach et al. (2000), Verhoeven et al. (2003) identified the same mutation in the RAB7 gene (602298.0001). However, the remaining affected members of family CMT126 did not share the RAB7 mutation and were excluded by linkage analysis from the CMT2B locus, indicating genetic heterogeneity. </p><p>Meggouh et al. (2006) identified a de novo heterozygous missense mutation in the RAB7 gene (602298.0004) in a 32-year-old man with CMT2B. He had onset of decreased sensation in the feet leading to small injuries at age 12 years. At age 32, he had steppage gait, atrophy of the lower legs and hand muscles, high-arched feet, claw toes, and decreased sensation in the lower limbs. </p>
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<h4>
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<strong>Nomenclature</strong>
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<p>Vance et al. (1996) found that this phenotype was not compatible with that in the CMT2 families they had observed and concluded that it should not be included in the same disease CMT2 classification, which typically has more motor involvement. Vance et al. (1996) suggested that it would better into the classification of hereditary autonomic and sensory neuropathy type 1 (HSAN1; 162400). Pericak-Vance et al. (1997) commented that the family reported by Kwon et al. (1995) and labeled CMT2B had a predominantly sensory neuropathy, with a motor component. Affected members commonly had ulcerations and amputations. Likewise, Kok et al. (2003) suggested that because of the severe sensory impairment and foot ulcers, the disorder should be considered to be a hereditary sensory neuropathy (HSN) and used the designation hereditary motor sensory neuropathy type IIB (HMSN2B). </p>
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<h4>
<span class="mim-font">
<strong>REFERENCES</strong>
</span>
</h4>
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<p />
</div>
<div>
<ol>
<li>
<p class="mim-text-font">
Auer-Grumbach, M., De Jonghe, P., Wagner, K., Verhoeven, K., Hartung, H.-P., Timmerman, V.
<strong>Phenotype-genotype correlations in a CMT2B family with refined 3q13-q22 locus.</strong>
Neurology 55: 1552-1557, 2000.
[PubMed: 11094113]
[Full Text: https://doi.org/10.1212/wnl.55.10.1552]
</p>
</li>
<li>
<p class="mim-text-font">
Auer-Grumbach, M., Wagner, K., Timmerman, V., De Jonghe, P., Hartung, H.-P.
<strong>Ulcero-mutilating neuropathy in an Austrian kinship without linkage to hereditary motor and sensory neuropathy IIB and hereditary sensory neuropathy I loci.</strong>
Neurology 54: 45-52, 2000.
[PubMed: 10636124]
[Full Text: https://doi.org/10.1212/wnl.54.1.45]
</p>
</li>
<li>
<p class="mim-text-font">
De Jonghe, P., Timmerman, V., FitzPatrick, D., Spoelders, P., Martin, J.-J., Van Broeckhoven, C.
<strong>Mutilating neuropathic ulcerations in a chromosome 3q13-q22 linked Charcot-Marie-Tooth disease type 2B family.</strong>
J. Neurol. Neurosurg. Psychiat. 62: 570-573, 1997.
[PubMed: 9219740]
[Full Text: https://doi.org/10.1136/jnnp.62.6.570]
</p>
</li>
<li>
<p class="mim-text-font">
Houlden, H., King, R. H. M., Muddle, J. R., Warner, T. T., Reilly, M. M., Orrell, R. W., Ginsberg, L.
<strong>A novel RAB7 mutation associated with ulcero-mutilating neuropathy.</strong>
Ann. Neurol. 56: 586-590, 2004.
[PubMed: 15455439]
[Full Text: https://doi.org/10.1002/ana.20281]
</p>
</li>
<li>
<p class="mim-text-font">
Kok, C., Kennerson, M. L., Spring, P. J., Ing, A. J., Pollard, J. D., Nicholson, G. A.
<strong>A locus for hereditary sensory neuropathy with cough and gastroesophageal reflux on chromosome 3p22-p24.</strong>
Am. J. Hum. Genet. 73: 632-637, 2003.
[PubMed: 12870133]
[Full Text: https://doi.org/10.1086/377591]
</p>
</li>
<li>
<p class="mim-text-font">
Kwon, J. M., Elliott, J. L., Yee, W.-C., Ivanovich, J., Scavarda, N.
<strong>Charcot-Marie-Tooth type II locus to chromosome 3q.</strong>
Am. J. Hum. Genet. 57: 853-858, 1995.
[PubMed: 7573046]
</p>
</li>
<li>
<p class="mim-text-font">
Meggouh, F., Bienfait, H. M. E., Weterman, M. A. J., de Visser, M., Baas, F.
<strong>Charcot-Marie-Tooth disease due to a de novo mutation of the RAB7 gene.</strong>
Neurology 67: 1476-1478, 2006.
[PubMed: 17060578]
[Full Text: https://doi.org/10.1212/01.wnl.0000240068.21499.f5]
</p>
</li>
<li>
<p class="mim-text-font">
Pericak-Vance, M. A., Speer, M. C., Lennon, F., West, S. G., Menold, M. M., Stajich, J. M., Wolpert, C. M., Slotterbeck, B. D., Saito, M., Tim, R. W., Rozear, M. P., Middleton, L. T., Tsuji, S., Vance, J. M.
<strong>Confirmation of a second locus for CMT2 and evidence for additional genetic heterogeneity.</strong>
Neurogenetics 1: 89-93, 1997.
[PubMed: 10732809]
[Full Text: https://doi.org/10.1007/s100480050013]
</p>
</li>
<li>
<p class="mim-text-font">
Vance, J. M., Speer, M. C., Stajich, J. M., West, S., Wolpert, C., Gaskell, P., Lennon, F., Tim, R. M., Rozear, M., Ben Othmane, K., Pericak-Vance, M. A.
<strong>Misclassification and linkage of hereditary sensory and autonomic neuropathy type 1 as Charcot-Marie-Tooth disease, type 2B. (Letter)</strong>
Am. J. Hum. Genet. 59: 258-260, 1996.
[PubMed: 8659534]
</p>
</li>
<li>
<p class="mim-text-font">
Verhoeven, K., De Jonghe, P., Coen, K., Verpoorten, N., Auer-Grumbach, M., Kwon, J. M., FitzPatrick, D., Schmedding, E., De Vriendt, E., Jacobs, A., Van Gerwen, V., Wagner, K., Hartung, H.-P., Timmerman, V.
<strong>Mutations in the small GTP-ase late endosomal protein RAB7 cause Charcot-Marie-Tooth type 2B neuropathy.</strong>
Am. J. Hum. Genet. 72: 722-727, 2003.
[PubMed: 12545426]
[Full Text: https://doi.org/10.1086/367847]
</p>
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