nih-gov/www.ncbi.nlm.nih.gov/omim/214400

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<title>
Entry
- #214400 - CHARCOT-MARIE-TOOTH DISEASE, DEMYELINATING, TYPE 4A; CMT4A
- OMIM
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<span class="h4">#214400</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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<li role="presentation">
<a href="#phenotypeMap"><strong>Phenotype-Gene Relationships</strong></a>
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<li role="presentation">
<a href="/clinicalSynopsis/214400"><strong>Clinical Synopsis</strong></a>
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<li role="presentation">
<a href="/phenotypicSeries/PS118220"> <strong>Phenotypic Series</strong> </a>
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<a href="#text"><strong>Text</strong></a>
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<li role="presentation" style="margin-left: 1em">
<a href="#description">Description</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#clinicalFeatures">Clinical Features</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#mapping">Mapping</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#inheritance">Inheritance</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#molecularGenetics">Molecular Genetics</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#populationGenetics">Population Genetics</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#history">History</a>
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<a href="#references"><strong>References</strong></a>
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<a href="#contributors"><strong>Contributors</strong></a>
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<a href="#creationDate"><strong>Creation Date</strong></a>
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<div><a href="https://clinicaltrials.gov/search?cond=(CHARCOT-MARIE-TOOTH DISEASE, DEMYELINATING, TYPE) OR (GDAP1)" class="mim-tip-hint" title="Clinical Trials" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Clinical Trials', 'domain': 'clinicaltrials.gov'})">Clinical Trials</a></div>
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<div><a href="https://www.ncbi.nlm.nih.gov/books/NBK1358/" class="mim-tip-hint" title="Expert-authored, peer-reviewed descriptions of inherited disorders including the uses of genetic testing in diagnosis, management, and genetic counseling." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Gene Reviews', 'domain': 'ncbi.nlm.nih.gov'})">Gene Reviews</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/gtr/all/tests/?term=214400[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>
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<div><a href="https://www.alliancegenome.org/disease/DOID:0110185" 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/214400" 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>
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<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.">
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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">
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<a id="title" class="mim-anchor"></a>
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<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> 715796006<br />
<strong>ORPHA:</strong> 99948<br />
<strong>DO:</strong> 0110185<br />
">ICD+</a>
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<div>
<span class="h3">
<span class="mim-font mim-tip-hint" title="Phenotype description, molecular basis known">
<span class="text-danger"><strong>#</strong></span>
214400
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<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
CHARCOT-MARIE-TOOTH DISEASE, DEMYELINATING, TYPE 4A; CMT4A
</span>
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<br />
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<span class="mim-font">
<em>Alternative titles; symbols</em>
</span>
</p>
</div>
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<h4>
<span class="mim-font">
CHARCOT-MARIE-TOOTH DISEASE, DEMYELINATING, AUTOSOMAL RECESSIVE, TYPE 4A<br />
CHARCOT-MARIE-TOOTH NEUROPATHY, TYPE 4A
</span>
</h4>
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<br />
</div>
</div>
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<a id="phenotypeMap" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>Phenotype-Gene Relationships</strong>
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</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/8/351?start=-3&limit=10&highlight=351">
8q21.11
</a>
</span>
</td>
<td>
<span class="mim-font">
Charcot-Marie-Tooth disease, type 4A
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/214400"> 214400 </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">
GDAP1
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606598"> 606598 </a>
</span>
</td>
</tr>
</tbody>
</table>
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<a href="/phenotypicSeries/PS118220" class="btn btn-info" role="button"> Phenotypic Series </a>
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<li><a href="/graph/linear/214400" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
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</ul>
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<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>
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<p />
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<div id="mimClinicalSynopsisFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small" style="margin: 5px">
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<span class="h5 mim-font">
<strong> INHERITANCE </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Autosomal recessive <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/258211005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">258211005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0441748&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0441748</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> SKELETAL </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Spine </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Kyphoscoliosis (in some patients) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405771009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405771009</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405772002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405772002</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405773007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405773007</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/M41" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">M41</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0600033&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0600033</a>, <a href="https://bioportal.bioontology.org/search?q=C0575158&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0575158</a>, <a href="https://bioportal.bioontology.org/search?q=C0345392&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0345392</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002751" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002751</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0008453" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0008453</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002751" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002751</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Hands </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Claw hand deformities (in severe cases) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/13624003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">13624003</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q71.6" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q71.6</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/Q71.60" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q71.60</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/755.58" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">755.58</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C2699510&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2699510</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001171" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001171</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0100257" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0100257</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Feet </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Foot deformities (in some patients) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/229844004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">229844004</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0016506&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0016506</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001760" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001760</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001760" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001760</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> 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">
- Delayed motor development <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1854301&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1854301</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001270" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001270</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001270" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001270</a>]</span><br /> -
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 /> -
Distal sensory impairment <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1847584&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1847584</a> 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> <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 /> -
Inability to walk by childhood/adolescence <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1859200&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1859200</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0006915" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0006915</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0006915" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0006915</a>]</span><br /> -
Decreased motor nerve conduction velocity (NCV) (less than 38 m/s) <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836341&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836341</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003431" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003431</a>]</span><br /> -
Hypertrophic nerve changes <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1832776&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1832776</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003382" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003382</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003382" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003382</a>]</span><br /> -
Basal lamina 'onion bulb' formations seen on nerve biopsy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5232339&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5232339</a>]</span><br /> -
Decreased number of myelinated fibers <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1843185&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1843185</a>]</span><br /> -
Hypomyelination <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/111007000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">111007000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0544820&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0544820</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MISCELLANEOUS </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Onset before age 2 years<br /> -
Usually begins in feet and legs (peroneal distribution)<br /> -
Upper limb involvement usually occurs later<br /> -
May progress to involve proximal muscles<br /> -
Rapid progression to disability<br /> -
Axonal features may coexist (normal NCV, axonal degeneration on biopsy)<br /> -
Genetic heterogeneity <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0242960&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0242960</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MOLECULAR BASIS </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Caused by mutation in the ganglioside-induced differentiation-associated protein-1 gene (GDAP1, <a href="/entry/606589#0001">606589.0001</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/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/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/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/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/8/137?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/8/304?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/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/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/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/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/17/244?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/17/579?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, 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/19/281?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/19/702?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/19/702?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/19/967?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">
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<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
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<a href="/geneMap/X/662?start=-3&limit=10&highlight=662"> Xq26 </a>
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<a href="/entry/302802"> Charcot-Marie-Tooth neuropathy, X-linked recessive, 3 </a>
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<abbr class="mim-tip-hint" title="X-linked recessive">XLR</abbr>
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<abbr class="mim-tip-hint" title="4 - A contiguous gene duplication or deletion syndrome in which multiple genes are involved"> 4 </abbr>
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<a href="/entry/302802"> 302802 </a>
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<a href="/entry/302802"> 302802 </a>
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<a href="/geneMap/X/675?start=-3&limit=10&highlight=675"> Xq26.1 </a>
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<a href="/entry/310490"> Cowchock syndrome </a>
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<abbr class="mim-tip-hint" title="X-linked recessive">XLR</abbr>
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<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
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<a href="/entry/310490"> 310490 </a>
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<a href="/entry/300169"> AIFM1 </a>
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<a href="/entry/300169"> 300169 </a>
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<p>A number sign (#) is used with this entry because autosomal recessive demyelinating Charcot-Marie-Tooth disease type 4A (CMT4A) is caused by homozygous mutation in the GDAP1 gene (<a href="/entry/606598">606598</a>), which encodes ganglioside-induced differentiation-associated protein-1, on chromosome 8q21.</p><p>Mutations in the GDAP1 gene also cause select forms of autosomal recessive axonal neuropathy (e.g., <a href="/entry/607706">607706</a> and CMT2K, <a href="/entry/607831">607831</a>) as well as an intermediate form of CMT (CMTRIA; <a href="/entry/608340">608340</a>). Mutations in the GDAP1 gene may also cause the axonal form CMT2H (<a href="/entry/607731">607731</a>) because the locus for that disorder has been mapped to 8q21.</p>
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<p>By convention, the designation CMT4 is applied to autosomal recessive forms of demyelinating Charcot-Marie-Tooth disease, which is a peripheral neuropathy characterized by distal motor and sensory impairment resulting in gait difficulties and associated with foot deformities. Motor nerve conduction velocities are decreased, and sural nerve biopsies show loss of myelinated fibers. The age at onset and severity is variable (summary by <a href="#10" class="mim-tip-reference" title="Patzko, A., Shy, M. E. &lt;strong&gt;Charcot-Marie-Tooth disease and related genetic neuropathies.&lt;/strong&gt; Continuum (Minneap. Minn.) 18: 39-59, 2012.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/22810069/&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;22810069&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1212/01.CON.0000411567.34085.da&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="22810069">Patzko and Shy, 2012</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=22810069" 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 of Charcot-Marie-Tooth Disease Type 4</em></strong></p><p>
Several different subtypes of autosomal recessive demyelinating CMT (CMT4) have been identified, each with particular ethnic, pathologic, or clinical characteristics: CMT4A; CMT4B, which includes CMT4B1 (<a href="/entry/601382">601382</a>), caused by mutation in the MTMR2 gene (<a href="/entry/603557">603557</a>), CMT4B2 (<a href="/entry/604563">604563</a>), caused by mutation in the SBF2 gene (<a href="/entry/607697">607697</a>), and CMT4B3 (<a href="/entry/615284">615284</a>), caused by mutation in the SBF1 gene (<a href="/entry/603560">603560</a>); CMT4C (<a href="/entry/601596">601596</a>), caused by mutation in the SH3TC2 gene (<a href="/entry/608206">608206</a>); CMT4D (<a href="/entry/601455">601455</a>), caused by mutation in the NDRG1 gene (<a href="/entry/605262">605262</a>); CMT4E (<a href="/entry/605253">605253</a>), caused by mutation in the EGR2 (<a href="/entry/129010">129010</a>) or MPZ (<a href="/entry/159440">159440</a>) genes; CMT4F (<a href="/entry/614895">614895</a>), caused by mutation in the PRX gene (<a href="/entry/605725">605725</a>); CMT4G, or Russe-type hereditary motor and sensory neuropathy, (<a href="/entry/605285">605285</a>), which maps to chromosome 10q23; CMT4H (<a href="/entry/609311">609311</a>), caused by mutation in the FGD4 gene (<a href="/entry/611104">611104</a>); CMT4J (<a href="/entry/611228">611228</a>), caused by mutation in the FIG4 gene (<a href="/entry/609390">609390</a>); and CMT4K (<a href="/entry/616684">616684</a>), caused by mutation in the SURF1 gene (<a href="/entry/185620">185620</a>).</p>
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<p><a href="#1" class="mim-tip-reference" title="Allan, W. &lt;strong&gt;Relation of hereditary pattern to clinical severity as illustrated by peroneal atrophy.&lt;/strong&gt; Arch. Intern. Med. 63: 1123-1131, 1939."None>Allan (1939)</a> found 8 young girls with a recessive form of peroneal atrophy in a North Carolina orthopedic hospital which catered to patients under the age of 16 years. The 8 came from 6 families in which both parents were normal. In 4 of the 6 families the parents were cousins. <a href="#3" class="mim-tip-reference" title="Beighton, P. H. &lt;strong&gt;Recessively inherited Charcot-Marie-Tooth syndrome in identical twins.&lt;/strong&gt; Birth Defects Orig. Art. Ser. VII(2): 105, 1971.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/5173114/&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;5173114&lt;/a&gt;]" pmid="5173114">Beighton (1971)</a> described 9 (possibly 10) cases of recessive CMT disease in an inbred Amish group. Identical twins were concordantly affected. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=5173114" 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>Ben Othmane et al. (<a href="#5" class="mim-tip-reference" title="Ben Othmane, K., Ben Hamida, M., Lennon, F., Loeb, D., Hentati, F., Ben Hamida, C., Blel, S., Pericak-Vance, M. A., Vance, J. M. &lt;strong&gt;Autosomal recessive Charcot-Marie-Tooth disease (CMT4) type A: evidence of genetic linkage to chromosome 8q21. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 53 (suppl.): A149, 1993."None>1993</a>, <a href="#6" class="mim-tip-reference" title="Ben Othmane, K., Hentati, F., Lennon, F., Ben Hamida, C., Blel, S., Roses, A. D., Pericak-Vance, M. A., Ben Hamida, M., Vance, J. M. &lt;strong&gt;Linkage of a locus (CMT4A) for autosomal recessive Charcot-Marie-Tooth disease to chromosome 8q.&lt;/strong&gt; Hum. Molec. Genet. 2: 1625-1628, 1993.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8268915/&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;8268915&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1093/hmg/2.10.1625&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="8268915">1993</a>) reported 4 Tunisian families with a homogeneous form of autosomal recessive demyelinating CMT. The disorder, which they designated type 4A, was a severe neuropathy of childhood characterized by early age of onset (before 2 years of age), rapidly progressive distal weakness and atrophy of the limbs leading to an inability to walk in late childhood or adolescence, mild sensory loss with abolished deep tendon reflexes, normal cerebrospinal fluid, severely decreased motor nerve conduction velocity (NCV), and hypomyelination. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8268915" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p>By genetic linkage studies, Ben Othmane et al. (<a href="#5" class="mim-tip-reference" title="Ben Othmane, K., Ben Hamida, M., Lennon, F., Loeb, D., Hentati, F., Ben Hamida, C., Blel, S., Pericak-Vance, M. A., Vance, J. M. &lt;strong&gt;Autosomal recessive Charcot-Marie-Tooth disease (CMT4) type A: evidence of genetic linkage to chromosome 8q21. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 53 (suppl.): A149, 1993."None>1993</a>, <a href="#6" class="mim-tip-reference" title="Ben Othmane, K., Hentati, F., Lennon, F., Ben Hamida, C., Blel, S., Roses, A. D., Pericak-Vance, M. A., Ben Hamida, M., Vance, J. M. &lt;strong&gt;Linkage of a locus (CMT4A) for autosomal recessive Charcot-Marie-Tooth disease to chromosome 8q.&lt;/strong&gt; Hum. Molec. Genet. 2: 1625-1628, 1993.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8268915/&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;8268915&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1093/hmg/2.10.1625&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="8268915">1993</a>) mapped the CMT4 gene to 8q-q21.1. A two-point peak lod score of 9.19 at theta = 0.00 was obtained for D8S164. The gene encoding peripheral myelin protein-2 (PMP2; <a href="/entry/170715">170715</a>) maps to the same area and was, therefore, a candidate for the site of the mutation in this disorder. <a href="#7" class="mim-tip-reference" title="Ben Othmane, K., Loeb, D., Hayworth-Hodgte, R., Hentati, F., Rao, N., Roses, A. D., Ben Hamida, M., Pericak-Vance, M. A., Vance, J. M. &lt;strong&gt;Physical and genetic mapping of the CMT4A locus and exclusion of PMP-2 as the defect in CMT4A.&lt;/strong&gt; Genomics 28: 286-290, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8530038/&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;8530038&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1006/geno.1995.1143&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="8530038">Ben Othmane et al. (1995)</a> demonstrated, however, that the PMP2 gene lies distal to the CMT4A gene region. Using a PAC contig and haplotype analysis, <a href="#4" class="mim-tip-reference" title="Ben Othmane, K. B., Rochelle, J. M., Hamida, M. B., Slotterbeck, B., Rao, N., Hentati, F., Pericak-Vance, M. A., Vance, J.M. &lt;strong&gt;Fine localization of the CMT4A locus using a PAC contig and haplotype analysis.&lt;/strong&gt; Neurogenetics 2: 18-23, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9933296/&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;9933296&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s100480050047&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="9933296">Ben Othmane et al. (1998)</a> further narrowed the assignment of the CMT4A locus. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=8530038+8268915+9933296" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p>The transmission pattern of CMT4A in the families reported by Ben Othmane et al. (<a href="#5" class="mim-tip-reference" title="Ben Othmane, K., Ben Hamida, M., Lennon, F., Loeb, D., Hentati, F., Ben Hamida, C., Blel, S., Pericak-Vance, M. A., Vance, J. M. &lt;strong&gt;Autosomal recessive Charcot-Marie-Tooth disease (CMT4) type A: evidence of genetic linkage to chromosome 8q21. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 53 (suppl.): A149, 1993."None>1993</a>, <a href="#5" class="mim-tip-reference" title="Ben Othmane, K., Ben Hamida, M., Lennon, F., Loeb, D., Hentati, F., Ben Hamida, C., Blel, S., Pericak-Vance, M. A., Vance, J. M. &lt;strong&gt;Autosomal recessive Charcot-Marie-Tooth disease (CMT4) type A: evidence of genetic linkage to chromosome 8q21. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 53 (suppl.): A149, 1993."None>1993</a>) and studied by <a href="#2" class="mim-tip-reference" title="Baxter, R. V., Ben Othmane, K., Rochelle, J. M., Stajich, J. E., Hulette, C., Dew-Knight, S., Hentati, F., Ben Hamida, M., Bel, S., Stenger, J. E., Gilbert, J. R., Pericak-Vance, M. A., Vance, J. M. &lt;strong&gt;Ganglioside-induced differentiation-associated protein-1 is mutant in Charcot-Marie-Tooth disease type 4A/8q21.&lt;/strong&gt; Nature Genet. 30: 21-22, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11743579/&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;11743579&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng796&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="11743579">Baxter et al. (2002)</a> was consistent with autosomal recessive inheritance. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11743579" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p>By positional cloning, <a href="#2" class="mim-tip-reference" title="Baxter, R. V., Ben Othmane, K., Rochelle, J. M., Stajich, J. E., Hulette, C., Dew-Knight, S., Hentati, F., Ben Hamida, M., Bel, S., Stenger, J. E., Gilbert, J. R., Pericak-Vance, M. A., Vance, J. M. &lt;strong&gt;Ganglioside-induced differentiation-associated protein-1 is mutant in Charcot-Marie-Tooth disease type 4A/8q21.&lt;/strong&gt; Nature Genet. 30: 21-22, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11743579/&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;11743579&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng796&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="11743579">Baxter et al. (2002)</a> identified the GDAP1 gene as the site of 3 different homozygous mutations (<a href="/entry/606598#0001">606598.0001</a>-<a href="/entry/606598#0003">606598.0003</a>) in the 4 Tunisian families with CMT4A reported by Ben Othmane et al. (<a href="#5" class="mim-tip-reference" title="Ben Othmane, K., Ben Hamida, M., Lennon, F., Loeb, D., Hentati, F., Ben Hamida, C., Blel, S., Pericak-Vance, M. A., Vance, J. M. &lt;strong&gt;Autosomal recessive Charcot-Marie-Tooth disease (CMT4) type A: evidence of genetic linkage to chromosome 8q21. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 53 (suppl.): A149, 1993."None>1993</a>, <a href="#5" class="mim-tip-reference" title="Ben Othmane, K., Ben Hamida, M., Lennon, F., Loeb, D., Hentati, F., Ben Hamida, C., Blel, S., Pericak-Vance, M. A., Vance, J. M. &lt;strong&gt;Autosomal recessive Charcot-Marie-Tooth disease (CMT4) type A: evidence of genetic linkage to chromosome 8q21. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 53 (suppl.): A149, 1993."None>1993</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11743579" 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>See comments of <a href="#9" class="mim-tip-reference" title="Nicholson, G., Ouvrier, R. &lt;strong&gt;GDAP1 mutations in CMT4: axonal and demyelinating phenotypes? (Editorial)&lt;/strong&gt; Neurology 59: 1835-1836, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12499472/&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;12499472&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1212/wnl.59.12.1835&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="12499472">Nicholson and Ouvrier (2002)</a> concerning the mixed axonal and demyelinating type of CMT resulting from GDAP1 mutations. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12499472" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>Population Genetics</strong>
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<p>The autosomal recessive form of demyelinating CMT is less frequent than the dominant (<a href="/entry/118200">118200</a>, <a href="/entry/118210">118210</a>) or X-linked recessive (<a href="/entry/302801">302801</a>) forms. Peroneal atrophy is one of the conditions used by <a href="#1" class="mim-tip-reference" title="Allan, W. &lt;strong&gt;Relation of hereditary pattern to clinical severity as illustrated by peroneal atrophy.&lt;/strong&gt; Arch. Intern. Med. 63: 1123-1131, 1939."None>Allan (1939)</a> to illustrate the 'law' that recessive disorders are more severe than dominant ones and that X-linked disorders tend to be intermediate in severity. This disorder may have been unusually frequent in the hill folk of the western part of North Carolina where Allan worked.</p><p>In western Norway, <a href="#11" class="mim-tip-reference" title="Skre, H. &lt;strong&gt;Genetic and clinical aspects of Charcot-Marie-Tooth&#x27;s disease.&lt;/strong&gt; Clin. Genet. 6: 98-118, 1974.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/4430158/&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;4430158&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1111/j.1399-0004.1974.tb00638.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="4430158">Skre (1974)</a> estimated the frequency of the 3 types of CMT as follows: autosomal dominant, 36 per 100,000; autosomal recessive, 1.4 per 100,000; X-linked recessive, 3.6 per 100,000. His discussion of the autosomal recessive form was particularly useful. He concluded that it is a more generalized disorder than the other two forms. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=4430158" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>History</strong>
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<p><a href="#8" class="mim-tip-reference" title="Mahloudji, M. &lt;strong&gt;A recessively inherited mixed polyneuropathy of early onset.&lt;/strong&gt; J. Med. Genet. 6: 411-412, 1969.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/5365950/&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;5365950&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1136/jmg.6.4.411&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="5365950">Mahloudji (1969)</a> described 2 sisters and a brother, born of consanguineous Iranian parents, with early childhood onset of a sensorimotor polyneuropathy. The 2 older sibs, sister and brother, were ages 17 and 18.5 years, respectively, at the time of the report. Both had delayed motor development, achieving walking at age 3 to 4 years. Gait was also awkward, with frequent falls, and Romberg sign was positive. Physical examination showed absence of all deep tendon reflexes and superficial abdominal reflexes. There was distal impairment of all sensory modalities affecting both the upper and lower limbs, which was more severe in the sister, extending up to her knees and thighs. Neither had muscle wasting, but both had mild weakness in the distal muscles, more prominent in the lower limbs. Cranial nerves were intact, intelligence was normal, and there were no foot deformities or dysarthria. The brother had scoliosis of the thoracic side and a supernumerary nipple on the right. The youngest 7-year-old sister had delayed development, abnormal gait, areflexia, and was unable to run. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=5365950" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>REFERENCES</strong>
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<a id="1" class="mim-anchor"></a>
<a id="Allan1939" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Allan, W.
<strong>Relation of hereditary pattern to clinical severity as illustrated by peroneal atrophy.</strong>
Arch. Intern. Med. 63: 1123-1131, 1939.
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<a id="2" class="mim-anchor"></a>
<a id="Baxter2002" class="mim-anchor"></a>
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<p class="mim-text-font">
Baxter, R. V., Ben Othmane, K., Rochelle, J. M., Stajich, J. E., Hulette, C., Dew-Knight, S., Hentati, F., Ben Hamida, M., Bel, S., Stenger, J. E., Gilbert, J. R., Pericak-Vance, M. A., Vance, J. M.
<strong>Ganglioside-induced differentiation-associated protein-1 is mutant in Charcot-Marie-Tooth disease type 4A/8q21.</strong>
Nature Genet. 30: 21-22, 2002.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11743579/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11743579</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11743579" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1038/ng796" target="_blank">Full Text</a>]
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<a id="Beighton1971" class="mim-anchor"></a>
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<p class="mim-text-font">
Beighton, P. H.
<strong>Recessively inherited Charcot-Marie-Tooth syndrome in identical twins.</strong>
Birth Defects Orig. Art. Ser. VII(2): 105, 1971.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/5173114/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">5173114</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=5173114" 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="Ben Othmane1998" class="mim-anchor"></a>
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Ben Othmane, K. B., Rochelle, J. M., Hamida, M. B., Slotterbeck, B., Rao, N., Hentati, F., Pericak-Vance, M. A., Vance, J.M.
<strong>Fine localization of the CMT4A locus using a PAC contig and haplotype analysis.</strong>
Neurogenetics 2: 18-23, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9933296/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9933296</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9933296" 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/s100480050047" target="_blank">Full Text</a>]
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<a id="5" class="mim-anchor"></a>
<a id="Ben Othmane1993" class="mim-anchor"></a>
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<p class="mim-text-font">
Ben Othmane, K., Ben Hamida, M., Lennon, F., Loeb, D., Hentati, F., Ben Hamida, C., Blel, S., Pericak-Vance, M. A., Vance, J. M.
<strong>Autosomal recessive Charcot-Marie-Tooth disease (CMT4) type A: evidence of genetic linkage to chromosome 8q21. (Abstract)</strong>
Am. J. Hum. Genet. 53 (suppl.): A149, 1993.
</p>
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<a id="6" class="mim-anchor"></a>
<a id="Ben Othmane1993" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Ben Othmane, K., Hentati, F., Lennon, F., Ben Hamida, C., Blel, S., Roses, A. D., Pericak-Vance, M. A., Ben Hamida, M., Vance, J. M.
<strong>Linkage of a locus (CMT4A) for autosomal recessive Charcot-Marie-Tooth disease to chromosome 8q.</strong>
Hum. Molec. Genet. 2: 1625-1628, 1993.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8268915/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8268915</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8268915" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1093/hmg/2.10.1625" target="_blank">Full Text</a>]
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<a id="Ben Othmane1995" class="mim-anchor"></a>
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Ben Othmane, K., Loeb, D., Hayworth-Hodgte, R., Hentati, F., Rao, N., Roses, A. D., Ben Hamida, M., Pericak-Vance, M. A., Vance, J. M.
<strong>Physical and genetic mapping of the CMT4A locus and exclusion of PMP-2 as the defect in CMT4A.</strong>
Genomics 28: 286-290, 1995.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8530038/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8530038</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8530038" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1006/geno.1995.1143" target="_blank">Full Text</a>]
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<a id="8" class="mim-anchor"></a>
<a id="Mahloudji1969" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Mahloudji, M.
<strong>A recessively inherited mixed polyneuropathy of early onset.</strong>
J. Med. Genet. 6: 411-412, 1969.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/5365950/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">5365950</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=5365950" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1136/jmg.6.4.411" target="_blank">Full Text</a>]
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<a id="Nicholson2002" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Nicholson, G., Ouvrier, R.
<strong>GDAP1 mutations in CMT4: axonal and demyelinating phenotypes? (Editorial)</strong>
Neurology 59: 1835-1836, 2002.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12499472/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12499472</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12499472" 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.59.12.1835" target="_blank">Full Text</a>]
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<a id="10" class="mim-anchor"></a>
<a id="Patzko2012" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Patzko, A., Shy, M. E.
<strong>Charcot-Marie-Tooth disease and related genetic neuropathies.</strong>
Continuum (Minneap. Minn.) 18: 39-59, 2012.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/22810069/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">22810069</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=22810069" 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.CON.0000411567.34085.da" target="_blank">Full Text</a>]
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<a id="11" class="mim-anchor"></a>
<a id="Skre1974" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Skre, H.
<strong>Genetic and clinical aspects of Charcot-Marie-Tooth's disease.</strong>
Clin. Genet. 6: 98-118, 1974.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/4430158/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">4430158</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=4430158" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1111/j.1399-0004.1974.tb00638.x" target="_blank">Full Text</a>]
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<span class="mim-text-font">
Cassandra L. Kniffin - updated : 10/22/2012
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<span class="mim-text-font">
Cassandra L. Kniffin - reorganized : 5/9/2003<br>Victor A. McKusick - updated : 1/21/2003<br>Victor A. McKusick - updated : 1/8/2002<br>Victor A. McKusick - updated : 4/12/1999
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Creation Date:
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Victor A. McKusick : 6/3/1986
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carol : 09/09/2024
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carol : 01/03/2024<br>carol : 12/15/2015<br>ckniffin : 12/10/2015<br>alopez : 6/27/2013<br>ckniffin : 6/25/2013<br>carol : 10/23/2012<br>terry : 10/23/2012<br>ckniffin : 10/22/2012<br>ckniffin : 4/13/2011<br>carol : 4/22/2005<br>ckniffin : 4/20/2005<br>carol : 4/19/2005<br>wwang : 4/18/2005<br>ckniffin : 4/15/2005<br>ckniffin : 4/20/2004<br>carol : 12/12/2003<br>ckniffin : 12/12/2003<br>ckniffin : 5/29/2003<br>carol : 5/9/2003<br>ckniffin : 5/9/2003<br>ckniffin : 5/2/2003<br>ckniffin : 4/24/2003<br>ckniffin : 4/23/2003<br>ckniffin : 4/14/2003<br>cwells : 1/27/2003<br>tkritzer : 1/21/2003<br>terry : 3/22/2002<br>alopez : 1/9/2002<br>alopez : 1/9/2002<br>terry : 1/8/2002<br>carol : 5/18/2001<br>carol : 9/13/2000<br>carol : 4/12/1999<br>mark : 8/15/1996<br>mark : 3/5/1996<br>mark : 8/25/1995<br>carol : 6/16/1994<br>mimadm : 4/17/1994<br>warfield : 3/11/1994<br>carol : 10/18/1993<br>carol : 10/13/1993
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<strong>#</strong> 214400
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CHARCOT-MARIE-TOOTH DISEASE, DEMYELINATING, TYPE 4A; CMT4A
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<em>Alternative titles; symbols</em>
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CHARCOT-MARIE-TOOTH DISEASE, DEMYELINATING, AUTOSOMAL RECESSIVE, TYPE 4A<br />
CHARCOT-MARIE-TOOTH NEUROPATHY, TYPE 4A
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<strong>SNOMEDCT:</strong> 715796006; &nbsp;
<strong>ORPHA:</strong> 99948; &nbsp;
<strong>DO:</strong> 0110185; &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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8q21.11
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Charcot-Marie-Tooth disease, type 4A
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214400
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Autosomal recessive
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3
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GDAP1
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606598
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because autosomal recessive demyelinating Charcot-Marie-Tooth disease type 4A (CMT4A) is caused by homozygous mutation in the GDAP1 gene (606598), which encodes ganglioside-induced differentiation-associated protein-1, on chromosome 8q21.</p><p>Mutations in the GDAP1 gene also cause select forms of autosomal recessive axonal neuropathy (e.g., 607706 and CMT2K, 607831) as well as an intermediate form of CMT (CMTRIA; 608340). Mutations in the GDAP1 gene may also cause the axonal form CMT2H (607731) because the locus for that disorder has been mapped to 8q21.</p>
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<strong>Description</strong>
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<p>By convention, the designation CMT4 is applied to autosomal recessive forms of demyelinating Charcot-Marie-Tooth disease, which is a peripheral neuropathy characterized by distal motor and sensory impairment resulting in gait difficulties and associated with foot deformities. Motor nerve conduction velocities are decreased, and sural nerve biopsies show loss of myelinated fibers. The age at onset and severity is variable (summary by Patzko and Shy, 2012). </p><p><strong><em>Genetic Heterogeneity of Charcot-Marie-Tooth Disease Type 4</em></strong></p><p>
Several different subtypes of autosomal recessive demyelinating CMT (CMT4) have been identified, each with particular ethnic, pathologic, or clinical characteristics: CMT4A; CMT4B, which includes CMT4B1 (601382), caused by mutation in the MTMR2 gene (603557), CMT4B2 (604563), caused by mutation in the SBF2 gene (607697), and CMT4B3 (615284), caused by mutation in the SBF1 gene (603560); CMT4C (601596), caused by mutation in the SH3TC2 gene (608206); CMT4D (601455), caused by mutation in the NDRG1 gene (605262); CMT4E (605253), caused by mutation in the EGR2 (129010) or MPZ (159440) genes; CMT4F (614895), caused by mutation in the PRX gene (605725); CMT4G, or Russe-type hereditary motor and sensory neuropathy, (605285), which maps to chromosome 10q23; CMT4H (609311), caused by mutation in the FGD4 gene (611104); CMT4J (611228), caused by mutation in the FIG4 gene (609390); and CMT4K (616684), caused by mutation in the SURF1 gene (185620).</p>
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<strong>Clinical Features</strong>
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<p>Allan (1939) found 8 young girls with a recessive form of peroneal atrophy in a North Carolina orthopedic hospital which catered to patients under the age of 16 years. The 8 came from 6 families in which both parents were normal. In 4 of the 6 families the parents were cousins. Beighton (1971) described 9 (possibly 10) cases of recessive CMT disease in an inbred Amish group. Identical twins were concordantly affected. </p><p>Ben Othmane et al. (1993, 1993) reported 4 Tunisian families with a homogeneous form of autosomal recessive demyelinating CMT. The disorder, which they designated type 4A, was a severe neuropathy of childhood characterized by early age of onset (before 2 years of age), rapidly progressive distal weakness and atrophy of the limbs leading to an inability to walk in late childhood or adolescence, mild sensory loss with abolished deep tendon reflexes, normal cerebrospinal fluid, severely decreased motor nerve conduction velocity (NCV), and hypomyelination. </p>
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<strong>Mapping</strong>
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<p>By genetic linkage studies, Ben Othmane et al. (1993, 1993) mapped the CMT4 gene to 8q-q21.1. A two-point peak lod score of 9.19 at theta = 0.00 was obtained for D8S164. The gene encoding peripheral myelin protein-2 (PMP2; 170715) maps to the same area and was, therefore, a candidate for the site of the mutation in this disorder. Ben Othmane et al. (1995) demonstrated, however, that the PMP2 gene lies distal to the CMT4A gene region. Using a PAC contig and haplotype analysis, Ben Othmane et al. (1998) further narrowed the assignment of the CMT4A locus. </p>
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<strong>Inheritance</strong>
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<p>The transmission pattern of CMT4A in the families reported by Ben Othmane et al. (1993, 1993) and studied by Baxter et al. (2002) was consistent with autosomal recessive inheritance. </p>
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<strong>Molecular Genetics</strong>
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<p>By positional cloning, Baxter et al. (2002) identified the GDAP1 gene as the site of 3 different homozygous mutations (606598.0001-606598.0003) in the 4 Tunisian families with CMT4A reported by Ben Othmane et al. (1993, 1993). </p><p>See comments of Nicholson and Ouvrier (2002) concerning the mixed axonal and demyelinating type of CMT resulting from GDAP1 mutations. </p>
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<strong>Population Genetics</strong>
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<p>The autosomal recessive form of demyelinating CMT is less frequent than the dominant (118200, 118210) or X-linked recessive (302801) forms. Peroneal atrophy is one of the conditions used by Allan (1939) to illustrate the 'law' that recessive disorders are more severe than dominant ones and that X-linked disorders tend to be intermediate in severity. This disorder may have been unusually frequent in the hill folk of the western part of North Carolina where Allan worked.</p><p>In western Norway, Skre (1974) estimated the frequency of the 3 types of CMT as follows: autosomal dominant, 36 per 100,000; autosomal recessive, 1.4 per 100,000; X-linked recessive, 3.6 per 100,000. His discussion of the autosomal recessive form was particularly useful. He concluded that it is a more generalized disorder than the other two forms. </p>
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<strong>History</strong>
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<p>Mahloudji (1969) described 2 sisters and a brother, born of consanguineous Iranian parents, with early childhood onset of a sensorimotor polyneuropathy. The 2 older sibs, sister and brother, were ages 17 and 18.5 years, respectively, at the time of the report. Both had delayed motor development, achieving walking at age 3 to 4 years. Gait was also awkward, with frequent falls, and Romberg sign was positive. Physical examination showed absence of all deep tendon reflexes and superficial abdominal reflexes. There was distal impairment of all sensory modalities affecting both the upper and lower limbs, which was more severe in the sister, extending up to her knees and thighs. Neither had muscle wasting, but both had mild weakness in the distal muscles, more prominent in the lower limbs. Cranial nerves were intact, intelligence was normal, and there were no foot deformities or dysarthria. The brother had scoliosis of the thoracic side and a supernumerary nipple on the right. The youngest 7-year-old sister had delayed development, abnormal gait, areflexia, and was unable to run. </p>
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<strong>REFERENCES</strong>
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<li>
<p class="mim-text-font">
Allan, W.
<strong>Relation of hereditary pattern to clinical severity as illustrated by peroneal atrophy.</strong>
Arch. Intern. Med. 63: 1123-1131, 1939.
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Baxter, R. V., Ben Othmane, K., Rochelle, J. M., Stajich, J. E., Hulette, C., Dew-Knight, S., Hentati, F., Ben Hamida, M., Bel, S., Stenger, J. E., Gilbert, J. R., Pericak-Vance, M. A., Vance, J. M.
<strong>Ganglioside-induced differentiation-associated protein-1 is mutant in Charcot-Marie-Tooth disease type 4A/8q21.</strong>
Nature Genet. 30: 21-22, 2002.
[PubMed: 11743579]
[Full Text: https://doi.org/10.1038/ng796]
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Beighton, P. H.
<strong>Recessively inherited Charcot-Marie-Tooth syndrome in identical twins.</strong>
Birth Defects Orig. Art. Ser. VII(2): 105, 1971.
[PubMed: 5173114]
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Ben Othmane, K. B., Rochelle, J. M., Hamida, M. B., Slotterbeck, B., Rao, N., Hentati, F., Pericak-Vance, M. A., Vance, J.M.
<strong>Fine localization of the CMT4A locus using a PAC contig and haplotype analysis.</strong>
Neurogenetics 2: 18-23, 1998.
[PubMed: 9933296]
[Full Text: https://doi.org/10.1007/s100480050047]
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<p class="mim-text-font">
Ben Othmane, K., Ben Hamida, M., Lennon, F., Loeb, D., Hentati, F., Ben Hamida, C., Blel, S., Pericak-Vance, M. A., Vance, J. M.
<strong>Autosomal recessive Charcot-Marie-Tooth disease (CMT4) type A: evidence of genetic linkage to chromosome 8q21. (Abstract)</strong>
Am. J. Hum. Genet. 53 (suppl.): A149, 1993.
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<p class="mim-text-font">
Ben Othmane, K., Hentati, F., Lennon, F., Ben Hamida, C., Blel, S., Roses, A. D., Pericak-Vance, M. A., Ben Hamida, M., Vance, J. M.
<strong>Linkage of a locus (CMT4A) for autosomal recessive Charcot-Marie-Tooth disease to chromosome 8q.</strong>
Hum. Molec. Genet. 2: 1625-1628, 1993.
[PubMed: 8268915]
[Full Text: https://doi.org/10.1093/hmg/2.10.1625]
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<p class="mim-text-font">
Ben Othmane, K., Loeb, D., Hayworth-Hodgte, R., Hentati, F., Rao, N., Roses, A. D., Ben Hamida, M., Pericak-Vance, M. A., Vance, J. M.
<strong>Physical and genetic mapping of the CMT4A locus and exclusion of PMP-2 as the defect in CMT4A.</strong>
Genomics 28: 286-290, 1995.
[PubMed: 8530038]
[Full Text: https://doi.org/10.1006/geno.1995.1143]
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<p class="mim-text-font">
Mahloudji, M.
<strong>A recessively inherited mixed polyneuropathy of early onset.</strong>
J. Med. Genet. 6: 411-412, 1969.
[PubMed: 5365950]
[Full Text: https://doi.org/10.1136/jmg.6.4.411]
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Nicholson, G., Ouvrier, R.
<strong>GDAP1 mutations in CMT4: axonal and demyelinating phenotypes? (Editorial)</strong>
Neurology 59: 1835-1836, 2002.
[PubMed: 12499472]
[Full Text: https://doi.org/10.1212/wnl.59.12.1835]
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<p class="mim-text-font">
Patzko, A., Shy, M. E.
<strong>Charcot-Marie-Tooth disease and related genetic neuropathies.</strong>
Continuum (Minneap. Minn.) 18: 39-59, 2012.
[PubMed: 22810069]
[Full Text: https://doi.org/10.1212/01.CON.0000411567.34085.da]
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<li>
<p class="mim-text-font">
Skre, H.
<strong>Genetic and clinical aspects of Charcot-Marie-Tooth&#x27;s disease.</strong>
Clin. Genet. 6: 98-118, 1974.
[PubMed: 4430158]
[Full Text: https://doi.org/10.1111/j.1399-0004.1974.tb00638.x]
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Cassandra L. Kniffin - updated : 10/22/2012<br>Cassandra L. Kniffin - reorganized : 5/9/2003<br>Victor A. McKusick - updated : 1/21/2003<br>Victor A. McKusick - updated : 1/8/2002<br>Victor A. McKusick - updated : 4/12/1999
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Creation Date:
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Victor A. McKusick : 6/3/1986
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carol : 09/09/2024<br>carol : 01/03/2024<br>carol : 12/15/2015<br>ckniffin : 12/10/2015<br>alopez : 6/27/2013<br>ckniffin : 6/25/2013<br>carol : 10/23/2012<br>terry : 10/23/2012<br>ckniffin : 10/22/2012<br>ckniffin : 4/13/2011<br>carol : 4/22/2005<br>ckniffin : 4/20/2005<br>carol : 4/19/2005<br>wwang : 4/18/2005<br>ckniffin : 4/15/2005<br>ckniffin : 4/20/2004<br>carol : 12/12/2003<br>ckniffin : 12/12/2003<br>ckniffin : 5/29/2003<br>carol : 5/9/2003<br>ckniffin : 5/9/2003<br>ckniffin : 5/2/2003<br>ckniffin : 4/24/2003<br>ckniffin : 4/23/2003<br>ckniffin : 4/14/2003<br>cwells : 1/27/2003<br>tkritzer : 1/21/2003<br>terry : 3/22/2002<br>alopez : 1/9/2002<br>alopez : 1/9/2002<br>terry : 1/8/2002<br>carol : 5/18/2001<br>carol : 9/13/2000<br>carol : 4/12/1999<br>mark : 8/15/1996<br>mark : 3/5/1996<br>mark : 8/25/1995<br>carol : 6/16/1994<br>mimadm : 4/17/1994<br>warfield : 3/11/1994<br>carol : 10/18/1993<br>carol : 10/13/1993
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