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<meta name="keywords" content="C4721436, autosomal recessive congenital hypomyelinating neuropathy, autosomal recessive congenital hypomyelinating or amyelinating neuropathy, charcot marie tooth disease type 4e, charcot-marie-tooth disease type 4e, charcot-marie-tooth disease, demyelinating, type 4e, charcot-marie-tooth disease, type 4e, charcot-marie-tooth neuropathy type 4e, charcot-marie-tooth neuropathy, type 4e, chn, chn1, cmt 4e, cmt4e, congenital hypomyelinating neuropathy (chn), congenital hypomyelinating neuropathy 1, autosomal recessive, congenital hypomyelination, congenital hypomyelination neuropathy, disease or syndrome, egr2, hypomyelinating neuropathy, congenital, 1, hypomyelination, severe congenital, neuropathy, congenital hypomyelinating, neuropathy, congenital hypomyelinating or amyelinating, autosomal recessive, neuropathy, congenital hypomyelinating, 1, neuropathy, congenital hypomyelinating, 1, autosomal recessive, neuropathy, congenital hypomyelinating, autosomal dominant, neuropathy, congenital hypomyelination, autosomal dominant, autosomal recessive, birth defects, chromosomal disease, chromosome, clinical features, clinical findings, clinical genetics, clinical recommendations, clinvar, congenital chromosomal disease, consumer genetic resources, cytogenetic location, disease characteristics, disease definitions, disease descriptions, disease ontology, disease synonyms, disease vocabulary, dysmorphology, entrez, familial disease, gene, gene-disease relationship, genereviews, genetic disease, genetic disorder, genetic terminology, genetic testing registry, genetics home reference, genomic disease, gtr, hereditary disease, heritable disease, hpo, human phenotype ontology, inherited disease, management guidelines, maternal inheritance, medgen, medical genetics, medical subject headings, mesh, mitochondrial inheritance, mode of inheritance, national center for biotechnology information, national institutes of health, national library of medicine, ncbi, nih, nlm, omim, ordo, orphanet, paternal inheritance, phenome, position statements, professional practice guidelines, rare disease, reference sequence, refseq, snomed ct, syndrome, undiagnosed diseases, x-linked recessive" /><meta name="description" content="Congenital hypomyelinating neuropathy (CHN) is characterized clinically by onset of hypotonia at birth, areflexia, distal muscle weakness, and very slow nerve conduction velocities (often less than 10 m/s). Warner et al. (1997, 1998) noted that pathologic findings on sural nerve biopsies show hypomyelination of most or all fibers. Based on these findings, CHN is considered to be a result of congenital impairment in myelin formation.&#13; There has been some controversy and difficulty in differentiating congenital hypomyelination from Dejerine-Sottas syndrome (DSS; 145900) because there is considerable overlap in clinical presentation. Based on pathologic findings of sural nerve biopsies (the absence of active myelin breakdown and the paucity of the onion bulbs in CHN and the presence of demyelination/remyelination and an abundance of well-organized onion bulbs in DSS; see Balestrini et al., 1991), CHN is considered to result from a congenital impairment in myelin formation, whereas DSS is thought to be due to aberrant demyelination and subsequent remyelination of the peripheral nerve.&#13; There is also variation in the prognosis of patients diagnosed with CHN. In patients with CHN, Harati and Butler (1985) showed correlation of morbidity and mortality with the presence/absence of onion bulbs: patients with few onion bulbs died in early infancy, usually because of difficulty in swallowing and respiration after birth. Patients with atypical onion bulbs survived but were affected with severe motor and sensory impairment. These differences in outcome may represent genetic heterogeneity such that mutations in essential early myelin gene(s) cause a severe phenotype, whereas mutations in other, possibly later acting gene(s), such as MPZ, lead to a less severe outcome.&#13; Genetic Heterogeneity of Congenital Hypomyelinating Neuropathy&#13; See also CHN2 (618184), caused by mutation in the MPZ gene (159440) on chromosome 1q23; and CHN3 (618186), caused by mutation in the CNTNAP1 gene (602346) on chromosome 17q21." /><meta name="robots" content="index,nofollow,noarchive" />
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<!--
UID=1648303
ConceptID=C4721436
-->
<!--imgCountBooks = 0--><h1 class="medgenTitle"><div class="MedGenTitleText">Charcot-Marie-Tooth disease type 4E<span class="h1sub">(CHN1)</span></div></h1><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1648303</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4721436</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div><table class="medgenTable"><tbody><tr><td>Synonyms:</td>
<td>CHARCOT-MARIE-TOOTH DISEASE, DEMYELINATING, TYPE 4E; Charcot-Marie-Tooth Neuropathy Type 4E; CHN1; CMT 4E; Congenital hypomyelinating neuropathy 1, autosomal recessive; Congenital Hypomyelination; HYPOMYELINATION, SEVERE CONGENITAL</td></tr>
<tr><td>Modes of inheritance:</td>
<td>
<div class="divPopper rprt" id="moi_141025"><div><strong>Autosomal recessive inheritance</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>141025</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0441748</a></dd><dt><span class="dotprefix"></span></dt><dd>Intellectual Product</dd></dl></div></div></div>
<div class="spaceAbove">Source: Orphanet</div>
<div class="spaceAbove">A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in individuals with two pathogenic alleles, either homozygotes (two copies of the same mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele).</div></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#moi_141025" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Autosomal recessive inheritance</a><span> (Orphanet)</span></div></td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td><a class="help jig-ncbi-popper" data-jig="ncbipopper" href="#target-gene-loc">Gene (location):<img class="pulldown" src="//static.pubmed.gov/portal/portal3rc.fcgi/4223267/img/4204968" /></a><div class="display-none" id="target-gene-loc">
Gene(s) directly associated with<br />
this condition or phenotype.</div></td>
<td><a target="_blank" title="EGR2 - ID: 1959 - NCBI Gene" href="/gene/1959" class="medgenPMinfo">EGR2</a> (10q21.3)</td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td>Monarch Initiative:</td>
<td><a href="https://monarchinitiative.org/disease/MONDO:0011527" target="_blank">MONDO:0011527</a></td></tr>
<tr><td>OMIM<span class="superscript">®</span>:</td>
<td><a href="https://omim.org/entry/605253" target="_blank">605253</a></td></tr>
<tr><td>Orphanet:</td>
<td><a target="_blank" title="Orphanet: The portal for rare diseases and orphan drugs" href="http://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&amp;Expert=99951">ORPHA99951</a></td></tr></tbody></table></div><div class="rprt-body jig-ncbiinpagenav" data-jigconfig="smoothScroll: false, gotoTopLink: true, gotoTopLinkText: '', gotoTopLinkAttrs: {'title': 'Go to the top of the page'},allHeadingLevels: ['h1'], topOfPageTOC: true, tocId: 'my-toc'"><div id="rprt-tabs-1" class="rprt-tab"><div id="tb-termsProp-1"><div class="leftCol mgCol"><div>
<div class="portlet mgSection" id="ID_100">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Definition">Definition</h1><a sid="100" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln">Congenital hypomyelinating neuropathy (CHN) is characterized clinically by onset of hypotonia at birth, areflexia, distal muscle weakness, and very slow nerve conduction velocities (often less than 10 m/s). Warner et al. (1997, 1998) noted that pathologic findings on sural nerve biopsies show hypomyelination of most or all fibers. Based on these findings, CHN is considered to be a result of congenital impairment in myelin formation.&#13; There has been some controversy and difficulty in differentiating congenital hypomyelination from Dejerine-Sottas syndrome (DSS; 145900) because there is considerable overlap in clinical presentation. Based on pathologic findings of sural nerve biopsies (the absence of active myelin breakdown and the paucity of the onion bulbs in CHN and the presence of demyelination/remyelination and an abundance of well-organized onion bulbs in DSS; see Balestrini et al., 1991), CHN is considered to result from a congenital impairment in myelin formation, whereas DSS is thought to be due to aberrant demyelination and subsequent remyelination of the peripheral nerve.&#13; There is also variation in the prognosis of patients diagnosed with CHN. In patients with CHN, Harati and Butler (1985) showed correlation of morbidity and mortality with the presence/absence of onion bulbs: patients with few onion bulbs died in early infancy, usually because of difficulty in swallowing and respiration after birth. Patients with atypical onion bulbs survived but were affected with severe motor and sensory impairment. These differences in outcome may represent genetic heterogeneity such that mutations in essential early myelin gene(s) cause a severe phenotype, whereas mutations in other, possibly later acting gene(s), such as MPZ, lead to a less severe outcome.&#13; Genetic Heterogeneity of Congenital Hypomyelinating Neuropathy&#13; See also CHN2 (618184), caused by mutation in the MPZ gene (159440) on chromosome 1q23; and CHN3 (618186), caused by mutation in the CNTNAP1 gene (602346) on chromosome 17q21. [from <a title="Online Mendelian Inheritance in Man" href="http://www.omim.org" class="defSource" target="_blank">OMIM</a>]</div>
</div>
<div class="portlet mgSection" id="ID_102">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Clinical_features">Clinical features</h1><a sid="102" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln clinfeat"><strong>From HPO</strong><br />
<div class="divPopper rprt" id="clin_305607"><div><strong>Upper limb muscle weakness</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>305607</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1698196</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Weakness of the muscles of the arms.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/305607">Feature record</a> | <a href="/medgen?term=%22Upper%20limb%20muscle%20weakness%22%5BClinical%20Features%5D%20OR%20305607%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_18386"><div><strong>Peripheral neuropathy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>18386</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0031117</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Peripheral neuropathy is a general term for any disorder of the peripheral nervous system. The main clinical features used to classify peripheral neuropathy are distribution, type (mainly demyelinating versus mainly axonal), duration, and course.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/18386">Feature record</a> | <a href="/medgen?term=%22Peripheral%20neuropathy%22%5BClinical%20Features%5D%20OR%2018386%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_115943"><div><strong>Areflexia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>115943</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0234146</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Absence of neurologic reflexes such as the knee-jerk reaction.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/115943">Feature record</a> | <a href="/medgen?term=%22Areflexia%22%5BClinical%20Features%5D%20OR%20115943%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_376237"><div><strong>Onion bulb formation</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>376237</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1847906</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Repeated episodes of segmental demyelination and remyelination lead to the accumulation of supernumerary Schwann cells around axons, which is referred to as onion bulb formation. This finding affects peripheral nerves.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/376237">Feature record</a> | <a href="/medgen?term=%22Onion%20bulb%20formation%22%5BClinical%20Features%5D%20OR%20376237%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_381392"><div><strong>Motor delay</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>381392</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1854301</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">A type of Developmental delay characterized by a delay in acquiring motor skills.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/381392">Feature record</a> | <a href="/medgen?term=%22Motor%20delay%22%5BClinical%20Features%5D%20OR%20381392%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_344302"><div><strong>Abnormal cranial nerve morphology</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>344302</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1854510</a></dd><dt><span class="dotprefix"></span></dt><dd>Anatomical Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Structural abnormality affecting one or more of the cranial nerves, which emerge directly from the brain stem.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/344302">Feature record</a> | <a href="/medgen?term=%22Abnormal%20cranial%20nerve%20morphology%22%5BClinical%20Features%5D%20OR%20344302%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_388130"><div><strong>Decreased motor nerve conduction velocity</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>388130</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1858729</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">A type of decreased nerve conduction velocity that affects the motor neuron.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/388130">Feature record</a> | <a href="/medgen?term=%22Decreased%20motor%20nerve%20conduction%20velocity%22%5BClinical%20Features%5D%20OR%20388130%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_870480"><div><strong>Peripheral hypomyelination</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>870480</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4024927</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Reduced amount of myelin in the nervous system resulting from defective myelinogenesis in the peripheral nervous system.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/870480">Feature record</a> | <a href="/medgen?term=%22Peripheral%20hypomyelination%22%5BClinical%20Features%5D%20OR%20870480%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_140883"><div><strong>Distal muscle weakness</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>140883</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0427065</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Reduced strength of the musculature of the distal extremities.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/140883">Feature record</a> | <a href="/medgen?term=%22Distal%20muscle%20weakness%22%5BClinical%20Features%5D%20OR%20140883%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_338530"><div><strong>Distal amyotrophy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>338530</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1848736</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Muscular atrophy affecting muscles in the distal portions of the extremities.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/338530">Feature record</a> | <a href="/medgen?term=%22Distal%20amyotrophy%22%5BClinical%20Features%5D%20OR%20338530%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_412209"><div><strong>Neonatal hypotonia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>412209</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C2267233</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Muscular hypotonia (abnormally low muscle tone) manifesting in the neonatal period.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/412209">Feature record</a> | <a href="/medgen?term=%22Neonatal%20hypotonia%22%5BClinical%20Features%5D%20OR%20412209%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_11197"><div><strong>Respiratory insufficiency</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>11197</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0035229</a></dd><dt><span class="dotprefix"></span></dt><dd>Pathologic Function</dd></dl></div></div></div>
<div class="spaceAbove">Impairment of gas exchange within the lungs secondary to a disease process, neoplasm, or trauma, possibly resulting in hypoxia, hypercarbia, or both, but not requiring intubation or mechanical ventilation. Patients are normally managed with pharmaceutical therapy, supplemental oxygen, or both.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/11197">Feature record</a> | <a href="/medgen?term=%22Respiratory%20insufficiency%22%5BClinical%20Features%5D%20OR%2011197%5Buid%5D">Search on this feature</a></div></div><div class="TreeLite" data-jigconfig="closed: 1"><div class="concept-def"><a class="small" href="#" onclick="jQuery(&quot;.TreeLite&quot;,&quot;#ID_102&quot;).TreeLite().openAll(); return false;">Show all</a><a class="small" href="#" onclick="jQuery(&quot;.TreeLite&quot;,&quot;#ID_102&quot;).TreeLite().closeAll(); return false;">Hide all</a></div><ul><li><span class="TLline">Abnormality of limbs</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_305607" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Upper limb muscle weakness</a></span></li></ul></li><li><span class="TLline">Abnormality of the musculoskeletal system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_338530" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Distal amyotrophy</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_140883" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Distal muscle weakness</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_412209" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Neonatal hypotonia</a></span></li></ul></li><li><span class="TLline">Abnormality of the nervous system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_344302" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Abnormal cranial nerve morphology</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_115943" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Areflexia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_388130" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Decreased motor nerve conduction velocity</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_381392" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Motor delay</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_376237" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Onion bulb formation</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_870480" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Peripheral hypomyelination</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_18386" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Peripheral neuropathy</a></span></li></ul></li><li><span class="TLline">Abnormality of the respiratory system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_11197" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Respiratory insufficiency</a></span></li></ul></li></ul></div></div>
</div>
<div class="portlet mgSection" id="ID_118">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Term_Hierarchy">Term Hierarchy</h1><a sid="118" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln HierarchyGTR"><div class="jig-ncbitabs"><ul><li><a href="#tabGTR">GTR</a></li><li><a href="#tabMGEN">MeSH</a></li></ul><div id="tabGTR"><div class="search_result"><div class="rprts"><div class="chiclet_legend"><span class="chiclet_list" style="position:static;"><span title="Clinical test" class="chiclet Ccolor round">C</span><span>Clinical test,  </span><span title="Research test" class="chiclet Rcolor round">R</span><span>Research test,  </span><span title="OMIM" class="chiclet Ocolor ">O</span><span>OMIM,  </span><span title="GeneReview" class="chiclet Gcolor">G</span><span><em>GeneReviews</em>,  </span><span title="ClinVar" class="chiclet Vcolor">V</span><span>ClinVar  </span></span></div><div id="hierarchy" class="margin_t1"><div class="ds_tree"><ul><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C0007959[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=2980">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=2980" target="_blank" href="/omim/118200">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=2980">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=2980" ref="ncbi_uid=2980">V</a></span></span><span class="TLline"><a href="/medgen/2980" ref="tree=GTR&amp;ncbi_uid=2980&amp;link_uid=2980" title="View MedGen record for 'Charcot-Marie-Tooth disease'">Charcot-Marie-Tooth disease</a></span><ul><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1842237[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=334023">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=334023" target="_blank" href="/omim/603623">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=334023" ref="ncbi_uid=334023">V</a></span></span><span class="TLline"><a href="/medgen/334023" ref="tree=GTR&amp;ncbi_uid=334023&amp;link_uid=334023" title="View MedGen record for 'Charcot-Marie-Tooth disease dominant intermediate C'">Charcot-Marie-Tooth disease dominant intermediate C</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C4302667[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=928336">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=928336" target="_blank" href="/omim/610982">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=928336" ref="ncbi_uid=928336">V</a></span></span><span class="TLline"><a href="/medgen/928336" ref="tree=GTR&amp;ncbi_uid=928336&amp;link_uid=928336" title="View MedGen record for 'Charcot-Marie-Tooth disease dominant intermediate E'">Charcot-Marie-Tooth disease dominant intermediate E</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C4749463[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=1666273">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=1666273" target="_blank" href="/omim/610863">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=1666273" ref="ncbi_uid=1666273">V</a></span></span><span class="TLline"><a href="/medgen/1666273" ref="tree=GTR&amp;ncbi_uid=1666273&amp;link_uid=1666273" title="View MedGen record for 'Charcot-Marie-Tooth disease dominant intermediate F'">Charcot-Marie-Tooth disease dominant intermediate F</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C0270914[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=124378">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet unavailable" title="OMIM">O</span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=124378">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=124378" ref="ncbi_uid=124378">V</a></span></span><span class="TLline"><a href="/medgen/124378" ref="tree=GTR&amp;ncbi_uid=124378&amp;link_uid=124378" title="View MedGen record for 'Charcot-Marie-Tooth disease type 2'">Charcot-Marie-Tooth disease type 2</a></span><ul><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1842984[DISCUI]&amp;test_type=Clinical&amp;redirect=true" ref="ncbi_uid=334294">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=334294" target="_blank" href="/omim/606598">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=334294" ref="ncbi_uid=334294">V</a></span></span><span class="TLline"><a href="/medgen/334294" ref="tree=GTR&amp;ncbi_uid=334294&amp;link_uid=334294" title="View MedGen record for 'Autosomal dominant Charcot-Marie-Tooth disease type 2K'">Autosomal dominant Charcot-Marie-Tooth disease type 2K</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C4304672[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=930341">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet unavailable" title="OMIM">O</span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=930341" ref="ncbi_uid=930341">V</a></span></span><span class="TLline"><a href="/medgen/930341" ref="tree=GTR&amp;ncbi_uid=930341&amp;link_uid=930341" title="View MedGen record for 'Autosomal dominant Charcot-Marie-Tooth disease type 2M'">Autosomal dominant Charcot-Marie-Tooth disease type 2M</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1853710[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=342947">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=342947" target="_blank" href="/omim/605427">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/?term=(NBK1358%20OR%20NBK201366)%20AND%20gene%5Bbook%5D&amp;showtype=onebook" ref="ncbi_uid=342947">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=342947" ref="ncbi_uid=342947">V</a></span></span><span class="TLline"><a href="/medgen/342947" ref="tree=GTR&amp;ncbi_uid=342947&amp;link_uid=342947" title="View MedGen record for 'Charcot-Marie-Tooth disease axonal type 2C'">Charcot-Marie-Tooth disease axonal type 2C</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1847823[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=335784">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=335784" target="_blank" href="/omim/602195">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=335784">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=335784" ref="ncbi_uid=335784">V</a></span></span><span class="TLline"><a href="/medgen/335784" ref="tree=GTR&amp;ncbi_uid=335784&amp;link_uid=335784" title="View MedGen record for 'Charcot-Marie-Tooth disease axonal type 2F'">Charcot-Marie-Tooth disease axonal type 2F</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1843173[DISCUI]&amp;test_type=Clinical&amp;redirect=true" ref="ncbi_uid=334344">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=334344" target="_blank" href="/omim/607731">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet unavailable" title="ClinVar">V</span></span><span class="TLline"><a href="/medgen/334344" ref="tree=GTR&amp;ncbi_uid=334344&amp;link_uid=334344" title="View MedGen record for 'Charcot-Marie-Tooth disease axonal type 2H'">Charcot-Marie-Tooth disease axonal type 2H</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1842983[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=375064">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=375064" target="_blank" href="/omim/606598">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=375064">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=375064" ref="ncbi_uid=375064">V</a></span></span><span class="TLline"><a href="/medgen/375064" ref="tree=GTR&amp;ncbi_uid=375064&amp;link_uid=375064" title="View MedGen record for 'Charcot-Marie-Tooth disease axonal type 2K'">Charcot-Marie-Tooth disease axonal type 2K</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1837552[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=324826">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=324826" target="_blank" href="/omim/608014">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=324826" ref="ncbi_uid=324826">V</a></span></span><span class="TLline"><a href="/medgen/324826" ref="tree=GTR&amp;ncbi_uid=324826&amp;link_uid=324826" title="View MedGen record for 'Charcot-Marie-Tooth disease axonal type 2L'">Charcot-Marie-Tooth disease axonal type 2L</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C2750090[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=413754">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=413754" target="_blank" href="/omim/601065">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=413754" ref="ncbi_uid=413754">V</a></span></span><span class="TLline"><a href="/medgen/413754" ref="tree=GTR&amp;ncbi_uid=413754&amp;link_uid=413754" title="View MedGen record for 'Charcot-Marie-Tooth disease axonal type 2N'">Charcot-Marie-Tooth disease axonal type 2N</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C3280220[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=481850">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=481850" target="_blank" href="/omim/600112">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK601997/" ref="ncbi_uid=481850">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=481850" ref="ncbi_uid=481850">V</a></span></span><span class="TLline"><a href="/medgen/481850" ref="tree=GTR&amp;ncbi_uid=481850&amp;link_uid=481850" title="View MedGen record for 'Charcot-Marie-Tooth disease axonal type 2O'">Charcot-Marie-Tooth disease axonal type 2O</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1833219[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=371512">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=371512" target="_blank" href="/omim/600882">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=371512">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=371512" ref="ncbi_uid=371512">V</a></span></span><span class="TLline"><a href="/medgen/371512" ref="tree=GTR&amp;ncbi_uid=371512&amp;link_uid=371512" title="View MedGen record for 'Charcot-Marie-Tooth disease type 2B'">Charcot-Marie-Tooth disease type 2B</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1843225[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=375127">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=375127" target="_blank" href="/omim/162280">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=375127" ref="ncbi_uid=375127">V</a></span></span><span class="TLline"><a href="/medgen/375127" ref="tree=GTR&amp;ncbi_uid=375127&amp;link_uid=375127" title="View MedGen record for 'Charcot-Marie-Tooth disease type 2E'">Charcot-Marie-Tooth disease type 2E</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C3888087[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=854756">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=854756" target="_blank" href="/omim/159440">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=854756" ref="ncbi_uid=854756">V</a></span></span><span class="TLline"><a href="/medgen/854756" ref="tree=GTR&amp;ncbi_uid=854756&amp;link_uid=854756" title="View MedGen record for 'Charcot-Marie-Tooth disease type 2I'">Charcot-Marie-Tooth disease type 2I</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1843153[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=375107">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=375107" target="_blank" href="/omim/159440">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=375107" ref="ncbi_uid=375107">V</a></span></span><span class="TLline"><a href="/medgen/375107" ref="tree=GTR&amp;ncbi_uid=375107&amp;link_uid=375107" title="View MedGen record for 'Charcot-Marie-Tooth disease type 2J'">Charcot-Marie-Tooth disease type 2J</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C2079538[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=389169">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet unavailable" title="OMIM">O</span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1511/" ref="ncbi_uid=389169">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=389169" ref="ncbi_uid=389169">V</a></span></span><span class="TLline"><a href="/medgen/389169" ref="tree=GTR&amp;ncbi_uid=389169&amp;link_uid=389169" title="View MedGen record for 'Charcot-Marie-Tooth disease, type 2A'">Charcot-Marie-Tooth disease, type 2A</a></span><ul><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1861678[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=350076">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=350076" target="_blank" href="/omim/118210">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1511/" ref="ncbi_uid=350076">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=350076" ref="ncbi_uid=350076">V</a></span></span><span class="TLline"><a href="/medgen/350076" ref="tree=GTR&amp;ncbi_uid=350076&amp;link_uid=350076" title="View MedGen record for 'Charcot-Marie-Tooth disease type 2A1'">Charcot-Marie-Tooth disease type 2A1</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C4721887[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=1648317">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=1648317" target="_blank" href="/omim/609260">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/?term=(NBK1358%20OR%20NBK1511)%20AND%20gene%5Bbook%5D&amp;showtype=onebook" ref="ncbi_uid=1648317">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=1648317" ref="ncbi_uid=1648317">V</a></span></span><span class="TLline"><a href="/medgen/1648317" ref="tree=GTR&amp;ncbi_uid=1648317&amp;link_uid=1648317" title="View MedGen record for 'Charcot-Marie-Tooth disease type 2A2'">Charcot-Marie-Tooth disease type 2A2</a></span></li></ul></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=CN118848[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=468444">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet unavailable" title="OMIM">O</span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet unavailable" title="ClinVar">V</span></span><span class="TLline"><a href="/medgen/468444" ref="tree=GTR&amp;ncbi_uid=468444&amp;link_uid=468444" title="View MedGen record for 'Charcot-Marie-Tooth Neuropathy Type 2H/2K'">Charcot-Marie-Tooth Neuropathy Type 2H/2K</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=CN118836[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=468432">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet unavailable" title="OMIM">O</span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1242/" ref="ncbi_uid=468432">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=468432" ref="ncbi_uid=468432">V</a></span></span><span class="TLline"><a href="/medgen/468432" ref="tree=GTR&amp;ncbi_uid=468432&amp;link_uid=468432" title="View MedGen record for 'GARS-Associated Axonal Neuropathy'">GARS-Associated Axonal Neuropathy</a></span><ul><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1832274[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=316946">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=316946" target="_blank" href="/omim/600287">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/?term=(NBK1242%20OR%20NBK1358)%20AND%20gene%5Bbook%5D&amp;showtype=onebook" ref="ncbi_uid=316946">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=316946" ref="ncbi_uid=316946">V</a></span></span><span class="TLline"><a href="/medgen/316946" ref="tree=GTR&amp;ncbi_uid=316946&amp;link_uid=316946" title="View MedGen record for 'Charcot-Marie-Tooth disease type 2D'">Charcot-Marie-Tooth disease type 2D</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=CN031873[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=1848393">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet unavailable" title="OMIM">O</span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/?term=(NBK1242%20OR%20NBK1307%20OR%20NBK1358)%20AND%20gene%5Bbook%5D&amp;showtype=onebook" ref="ncbi_uid=1848393">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=1848393" ref="ncbi_uid=1848393">V</a></span></span><span class="TLline"><a href="/medgen/1848393" ref="tree=GTR&amp;ncbi_uid=1848393&amp;link_uid=1848393" title="View MedGen record for 'Neuronopathy, distal hereditary motor, type 5A'">Neuronopathy, distal hereditary motor, type 5A</a></span></li></ul></li></ul></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C4082197[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=905419">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet unavailable" title="OMIM">O</span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=905419">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=905419" ref="ncbi_uid=905419">V</a></span></span><span class="TLline"><a href="/medgen/905419" ref="tree=GTR&amp;ncbi_uid=905419&amp;link_uid=905419" title="View MedGen record for 'Charcot-Marie-Tooth disease type 4'">Charcot-Marie-Tooth disease type 4</a></span><ul><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1859198[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=347821">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=347821" target="_blank" href="/omim/214400">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/?term=(NBK1358%20OR%20NBK1539)%20AND%20gene%5Bbook%5D&amp;showtype=onebook" ref="ncbi_uid=347821">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=347821" ref="ncbi_uid=347821">V</a></span></span><span class="TLline"><a href="/medgen/347821" ref="tree=GTR&amp;ncbi_uid=347821&amp;link_uid=347821" title="View MedGen record for 'Charcot-Marie-Tooth disease type 4A'">Charcot-Marie-Tooth disease type 4A</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1832399[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=321947">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=321947" target="_blank" href="/omim/601382">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=321947" ref="ncbi_uid=321947">V</a></span></span><span class="TLline"><a href="/medgen/321947" ref="tree=GTR&amp;ncbi_uid=321947&amp;link_uid=321947" title="View MedGen record for 'Charcot-Marie-Tooth disease type 4B1'">Charcot-Marie-Tooth disease type 4B1</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1858278[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=346869">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=346869" target="_blank" href="/omim/604563">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=346869" ref="ncbi_uid=346869">V</a></span></span><span class="TLline"><a href="/medgen/346869" ref="tree=GTR&amp;ncbi_uid=346869&amp;link_uid=346869" title="View MedGen record for 'Charcot-Marie-Tooth disease type 4B2'">Charcot-Marie-Tooth disease type 4B2</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1866636[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=356581">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=356581" target="_blank" href="/omim/601596">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/?term=(NBK1340%20OR%20NBK1358)%20AND%20gene%5Bbook%5D&amp;showtype=onebook" ref="ncbi_uid=356581">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=356581" ref="ncbi_uid=356581">V</a></span></span><span class="TLline"><a href="/medgen/356581" ref="tree=GTR&amp;ncbi_uid=356581&amp;link_uid=356581" title="View MedGen record for 'Charcot-Marie-Tooth disease type 4C'">Charcot-Marie-Tooth disease type 4C</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1832334[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=371304">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=371304" target="_blank" href="/omim/601455">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=371304" ref="ncbi_uid=371304">V</a></span></span><span class="TLline"><a href="/medgen/371304" ref="tree=GTR&amp;ncbi_uid=371304&amp;link_uid=371304" title="View MedGen record for 'Charcot-Marie-Tooth disease type 4D'">Charcot-Marie-Tooth disease type 4D</a></span></li><li class="matched_ds"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C4721436[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=1648303">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=1648303" target="_blank" href="/omim/129010">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=1648303" ref="ncbi_uid=1648303">V</a></span></span><span class="TLline">Charcot-Marie-Tooth disease type 4E</span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C3540453[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=761704">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=761704" target="_blank" href="/omim/614895">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=761704">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=761704" ref="ncbi_uid=761704">V</a></span></span><span class="TLline"><a href="/medgen/761704" ref="tree=GTR&amp;ncbi_uid=761704&amp;link_uid=761704" title="View MedGen record for 'Charcot-Marie-Tooth disease type 4F'">Charcot-Marie-Tooth disease type 4F</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1854449[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=343122">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=343122" target="_blank" href="/omim/142600">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=343122" ref="ncbi_uid=343122">V</a></span></span><span class="TLline"><a href="/medgen/343122" ref="tree=GTR&amp;ncbi_uid=343122&amp;link_uid=343122" title="View MedGen record for 'Charcot-Marie-Tooth disease type 4G'">Charcot-Marie-Tooth disease type 4G</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1836336[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=324487">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=324487" target="_blank" href="/omim/609311">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=324487">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=324487" ref="ncbi_uid=324487">V</a></span></span><span class="TLline"><a href="/medgen/324487" ref="tree=GTR&amp;ncbi_uid=324487&amp;link_uid=324487" title="View MedGen record for 'Charcot-Marie-Tooth disease type 4H'">Charcot-Marie-Tooth disease type 4H</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1970011[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=370808">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=370808" target="_blank" href="/omim/609390">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=370808">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=370808" ref="ncbi_uid=370808">V</a></span></span><span class="TLline"><a href="/medgen/370808" ref="tree=GTR&amp;ncbi_uid=370808&amp;link_uid=370808" title="View MedGen record for 'Charcot-Marie-Tooth disease type 4J'">Charcot-Marie-Tooth disease type 4J</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C0011195[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=3710">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=3710" target="_blank" href="/omim/145900">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=3710" ref="ncbi_uid=3710">V</a></span></span><span class="TLline"><a href="/medgen/3710" ref="tree=GTR&amp;ncbi_uid=3710&amp;link_uid=3710" title="View MedGen record for 'Dejerine-Sottas disease'">Dejerine-Sottas disease</a></span></li></ul></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C0751036[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=155486">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=155486" target="_blank" href="/omim/118200">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=155486">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=155486" ref="ncbi_uid=155486">V</a></span></span><span class="TLline"><a href="/medgen/155486" ref="tree=GTR&amp;ncbi_uid=155486&amp;link_uid=155486" title="View MedGen record for 'Charcot-Marie-Tooth disease, type I'">Charcot-Marie-Tooth disease, type I</a></span><ul><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C0270912[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=124377">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=124377" target="_blank" href="/omim/118200">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=124377">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=124377" ref="ncbi_uid=124377">V</a></span></span><span class="TLline"><a href="/medgen/124377" ref="tree=GTR&amp;ncbi_uid=124377&amp;link_uid=124377" title="View MedGen record for 'Charcot-Marie-Tooth disease type 1B'">Charcot-Marie-Tooth disease type 1B</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C0270913[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=75728">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=75728" target="_blank" href="/omim/601098">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=75728" ref="ncbi_uid=75728">V</a></span></span><span class="TLline"><a href="/medgen/75728" ref="tree=GTR&amp;ncbi_uid=75728&amp;link_uid=75728" title="View MedGen record for 'Charcot-Marie-Tooth disease type 1C'">Charcot-Marie-Tooth disease type 1C</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1843247[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=334709">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=334709" target="_blank" href="/omim/129010">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=334709" ref="ncbi_uid=334709">V</a></span></span><span class="TLline"><a href="/medgen/334709" ref="tree=GTR&amp;ncbi_uid=334709&amp;link_uid=334709" title="View MedGen record for 'Charcot-Marie-Tooth disease type 1D'">Charcot-Marie-Tooth disease type 1D</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C3495591[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=501212">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=501212" target="_blank" href="/omim/118300">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=501212" ref="ncbi_uid=501212">V</a></span></span><span class="TLline"><a href="/medgen/501212" ref="tree=GTR&amp;ncbi_uid=501212&amp;link_uid=501212" title="View MedGen record for 'Charcot-Marie-Tooth disease type 1E'">Charcot-Marie-Tooth disease type 1E</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1843164[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=334337">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=334337" target="_blank" href="/omim/162280">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=334337" ref="ncbi_uid=334337">V</a></span></span><span class="TLline"><a href="/medgen/334337" ref="tree=GTR&amp;ncbi_uid=334337&amp;link_uid=334337" title="View MedGen record for 'Charcot-Marie-Tooth disease type 1F'">Charcot-Marie-Tooth disease type 1F</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C0270911[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=75727">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=75727" target="_blank" href="/omim/118220">O</a></span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=75727" ref="ncbi_uid=75727">V</a></span></span><span class="TLline"><a href="/medgen/75727" ref="tree=GTR&amp;ncbi_uid=75727&amp;link_uid=75727" title="View MedGen record for 'Charcot-Marie-Tooth disease, type IA'">Charcot-Marie-Tooth disease, type IA</a></span></li></ul></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=CN118851[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=468447">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet unavailable" title="OMIM">O</span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=468447">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=468447" ref="ncbi_uid=468447">V</a></span></span><span class="TLline"><a href="/medgen/468447" ref="tree=GTR&amp;ncbi_uid=468447&amp;link_uid=468447" title="View MedGen record for 'Charcot-Marie-Tooth Neuropathy X'">Charcot-Marie-Tooth Neuropathy X</a></span><ul><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C0393808[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=98290">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=98290" target="_blank" href="/omim/302800">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/?term=(NBK1358%20OR%20NBK1374)%20AND%20gene%5Bbook%5D&amp;showtype=onebook" ref="ncbi_uid=98290">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=98290" ref="ncbi_uid=98290">V</a></span></span><span class="TLline"><a href="/medgen/98290" ref="tree=GTR&amp;ncbi_uid=98290&amp;link_uid=98290" title="View MedGen record for 'Charcot-Marie-Tooth disease X-linked dominant 1'">Charcot-Marie-Tooth disease X-linked dominant 1</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1844873[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=336803">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=336803" target="_blank" href="/omim/302801">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=336803">G</a></span><span class="chiclet unavailable" title="ClinVar">V</span></span><span class="TLline"><a href="/medgen/336803" ref="tree=GTR&amp;ncbi_uid=336803&amp;link_uid=336803" title="View MedGen record for 'Charcot-Marie-Tooth disease X-linked recessive 2'">Charcot-Marie-Tooth disease X-linked recessive 2</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1844865[DISCUI]&amp;test_type=Clinical&amp;redirect=true" ref="ncbi_uid=375530">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=375530" target="_blank" href="/omim/302802">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=375530">G</a></span><span class="chiclet unavailable" title="ClinVar">V</span></span><span class="TLline"><a href="/medgen/375530" ref="tree=GTR&amp;ncbi_uid=375530&amp;link_uid=375530" title="View MedGen record for 'Charcot-Marie-Tooth disease X-linked recessive 3'">Charcot-Marie-Tooth disease X-linked recessive 3</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C0795910[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=162891">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=162891" target="_blank" href="/omim/300169">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1358/" ref="ncbi_uid=162891">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=162891" ref="ncbi_uid=162891">V</a></span></span><span class="TLline"><a href="/medgen/162891" ref="tree=GTR&amp;ncbi_uid=162891&amp;link_uid=162891" title="View MedGen record for 'Charcot-Marie-Tooth disease X-linked recessive 4'">Charcot-Marie-Tooth disease X-linked recessive 4</a></span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1839566[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=374254">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=374254" target="_blank" href="/omim/258650">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/?term=(NBK1358%20OR%20NBK2591)%20AND%20gene%5Bbook%5D&amp;showtype=onebook" ref="ncbi_uid=374254">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=374254" ref="ncbi_uid=374254">V</a></span></span><span class="TLline"><a href="/medgen/374254" ref="tree=GTR&amp;ncbi_uid=374254&amp;link_uid=374254" title="View MedGen record for 'Charcot-Marie-Tooth disease X-linked recessive 5'">Charcot-Marie-Tooth disease X-linked recessive 5</a></span></li></ul></li></ul></li></ul></div></div></div></div></div><div id="tabMGEN"><div class="ds_tree"><ul><li><span class="TLline"><a href="/medgen/1254" ref="tree=MeSH" title="MedGen record for Fetal anomaly">Fetal anomaly</a></span><ul><li><span class="TLline"><a href="/medgen/474891" ref="tree=MeSH" title="MedGen record for Congenital Systemic Disorder">Congenital Systemic Disorder</a></span><ul><li><span class="TLline"><a href="/medgen/105425" ref="tree=MeSH" title="MedGen record for Abnormality of the nervous system">Abnormality of the nervous system</a></span><ul><li><span class="TLline"><a href="/medgen/45066" ref="tree=MeSH" title="MedGen record for Hereditary motor and sensory neuropathy">Hereditary motor and sensory neuropathy</a></span><ul><li><span class="TLline"><a href="/medgen/2980" ref="tree=MeSH" title="MedGen record for Charcot-Marie-Tooth disease">Charcot-Marie-Tooth disease</a></span><ul><li><span class="TLline"><a href="/medgen/905419" ref="tree=MeSH" title="MedGen record for Charcot-Marie-Tooth disease type 4">Charcot-Marie-Tooth disease type 4</a></span><ul><li><span class="matched_ds">Charcot-Marie-Tooth disease type 4E</span></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></div></div></div></div>
</div>
<div class="display-none help-popup" id="guidelinesHelpPM">These guidelines are articles in PubMed that match specific search criteria developed by MedGen to capture the most relevant practice guidelines. This list may not be comprehensive and may include broader topics as well. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div><div class="display-none help-popup" id="guidelinesHelpCurated">These guidelines are manually curated by the MedGen team
to supplement articles available in PubMed. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div>
<div class="portlet mgSection" id="ID_103">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Recent_clinical_studies">Recent clinical studies</h1><a sid="103" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><h3 class="subhead">Diagnosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/35058287">Diagnosis of a floppy neonate with misleading clues: unraveled as congenital hypomyelinating neuropathy.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Ravikumar S,
Devi U,
Balakrishnan U,
Chandrasekaran A</span><br />
<span class="medgenPMjournal">BMJ Case Rep</span>
2022 Jan 20;15(1)
doi: 10.1136/bcr-2021-247555.
<span class="bold">PMID: </span><a href="/pubmed/35058287" target="_blank">35058287</a><a href="/pmc/articles/PMC8783819" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/23313019">Biopsy in a patient with PMP22 exon 2 mutation recapitulates pathology of Trembler-J mouse.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Madrid RE,
Lofgren A,
Baets J,
Timmerman V</span><br />
<span class="medgenPMjournal">Neuromuscul Disord</span>
2013 Apr;23(4):345-8.
Epub 2013 Jan 10
doi: 10.1016/j.nmd.2012.12.005.
<span class="bold">PMID: </span><a href="/pubmed/23313019" target="_blank">23313019</a></div>
<div class="nl"><a target="_blank" href="/pubmed/20976668">Clinical implications of peripheral myelin protein 22 for nerve compression and neural regeneration: a review.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Hui-Chou HG,
Hashemi SS,
Hoke A,
Dellon AL</span><br />
<span class="medgenPMjournal">J Reconstr Microsurg</span>
2011 Jan;27(1):67-74.
Epub 2010 Oct 25
doi: 10.1055/s-0030-1267832.
<span class="bold">PMID: </span><a href="/pubmed/20976668" target="_blank">20976668</a></div>
<div class="nl"><a target="_blank" href="/pubmed/20621479">Novel MPZ mutations and congenital hypomyelinating neuropathy.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">McMillan HJ,
Santagata S,
Shapiro F,
Batish SD,
Couchon L,
Donnelly S,
Kang PB</span><br />
<span class="medgenPMjournal">Neuromuscul Disord</span>
2010 Nov;20(11):725-9.
doi: 10.1016/j.nmd.2010.06.004.
<span class="bold">PMID: </span><a href="/pubmed/20621479" target="_blank">20621479</a><a href="/pmc/articles/PMC2952650" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Charcot-Marie-Tooth%20disease%20type%204E%22%20AND%20Diagnosis%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (4)</a></div><h3 class="subhead">Prognosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/27668699">Novel mutation in CNTNAP1 results in congenital hypomyelinating neuropathy.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Mehta P,
Küspert M,
Bale T,
Brownstein CA,
Towne MC,
De Girolami U,
Shi J,
Beggs AH,
Darras BT,
Wegner M,
Piao X,
Agrawal PB</span><br />
<span class="medgenPMjournal">Muscle Nerve</span>
2017 May;55(5):761-765.
Epub 2017 Feb 3
doi: 10.1002/mus.25416.
<span class="bold">PMID: </span><a href="/pubmed/27668699" target="_blank">27668699</a><a href="/pmc/articles/PMC5366284" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/22176150">Congenital hypomyelinating neuropathy due to a novel MPZ mutation.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Sevilla T,
Lupo V,
Sivera R,
Marco-Marín C,
Martínez-Rubio D,
Rivas E,
Hernández A,
Palau F,
Espinós C</span><br />
<span class="medgenPMjournal">J Peripher Nerv Syst</span>
2011 Dec;16(4):347-52.
doi: 10.1111/j.1529-8027.2011.00369.x.
<span class="bold">PMID: </span><a href="/pubmed/22176150" target="_blank">22176150</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Charcot-Marie-Tooth%20disease%20type%204E%22%20AND%20Prognosis%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (2)</a></div><h3 class="subhead">Clinical prediction guides</h3>
<div class="nl"><a target="_blank" href="/pubmed/27067623">Congenital hypomyelinating neuropathy due to the association of a truncating mutation in PMP22 with the classical HNPP deletion.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Jouaud M,
Gonnaud PM,
Richard L,
Latour P,
Ollagnon-Roman E,
Sturtz F,
Mathis S,
Magy L,
Vallat JM</span><br />
<span class="medgenPMjournal">Neuromuscul Disord</span>
2016 Apr-May;26(4-5):316-21.
Epub 2016 Apr 5
doi: 10.1016/j.nmd.2016.01.004.
<span class="bold">PMID: </span><a href="/pubmed/27067623" target="_blank">27067623</a></div>
<div class="nl"><a target="_blank" href="/pubmed/23395447">Human iPSC-derived oligodendrocyte progenitor cells can myelinate and rescue a mouse model of congenital hypomyelination.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Wang S,
Bates J,
Li X,
Schanz S,
Chandler-Militello D,
Levine C,
Maherali N,
Studer L,
Hochedlinger K,
Windrem M,
Goldman SA</span><br />
<span class="medgenPMjournal">Cell Stem Cell</span>
2013 Feb 7;12(2):252-64.
doi: 10.1016/j.stem.2012.12.002.
<span class="bold">PMID: </span><a href="/pubmed/23395447" target="_blank">23395447</a><a href="/pmc/articles/PMC3700553" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/22522483">Homozygous deletion of an EGR2 enhancer in congenital amyelinating neuropathy.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Funalot B,
Topilko P,
Arroyo MA,
Sefiani A,
Hedley-Whyte ET,
Yoldi ME,
Richard L,
Touraille E,
Laurichesse M,
Khalifa E,
Chauzeix J,
Ouedraogo A,
Cros D,
Magdelaine C,
Sturtz FG,
Urtizberea JA,
Charnay P,
Bragado FG,
Vallat JM</span><br />
<span class="medgenPMjournal">Ann Neurol</span>
2012 May;71(5):719-23.
doi: 10.1002/ana.23527.
<span class="bold">PMID: </span><a href="/pubmed/22522483" target="_blank">22522483</a></div>
<div class="nl"><a target="_blank" href="/pubmed/22176150">Congenital hypomyelinating neuropathy due to a novel MPZ mutation.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Sevilla T,
Lupo V,
Sivera R,
Marco-Marín C,
Martínez-Rubio D,
Rivas E,
Hernández A,
Palau F,
Espinós C</span><br />
<span class="medgenPMjournal">J Peripher Nerv Syst</span>
2011 Dec;16(4):347-52.
doi: 10.1111/j.1529-8027.2011.00369.x.
<span class="bold">PMID: </span><a href="/pubmed/22176150" target="_blank">22176150</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Charcot-Marie-Tooth%20disease%20type%204E%22%20AND%20Clinical%20prediction%20guides%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (4)</a></div></div>
</div>
</div></div></div></div></div></div></div>
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</div>
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</div>
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</div>
<div class="supplemental col three_col last">
<h2 class="offscreen_noflow">Supplemental Content</h2>
<div>
<!-- MedGen supplemental column starts here -->
<div class="rightCol mgCol">
<div class="portlet mgSection" id="ID_113">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Table_of_contents">Table of contents</h1><a sid="113" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul id="my-toc"></ul></div>
</div>
<div class="portlet mgSection" id="ID_106">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Genetic_Testing_Registry">Genetic Testing Registry</h1><a sid="106" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="/gtr/tests?term=C4721436%5bDISCUI%5d&amp;filter=method%3A2%5F8" target="_blank">Deletion/duplication analysis (26)</a></li>
<li><a href="/gtr/tests?term=C4721436%5bDISCUI%5d&amp;filter=method%3A2%5F17" target="_blank">Mutation scanning of the entire coding region (1)</a></li>
<li><a href="/gtr/tests?term=C4721436%5bDISCUI%5d&amp;filter=method%3A2%5F7" target="_blank">Sequence analysis of the entire coding region (41)</a></li>
<li><a href="/gtr/tests?term=C4721436%5bDISCUI%5d&amp;filter=method%3A2%5F19" target="_blank">Targeted variant analysis (5)</a></li>
<li class="portletSeeAll portletSeeAllPad"><total><a href="/gtr/tests?term=C4721436%5bDISCUI%5d" target="_blank">See all (46)</a></total></li>
</ul></div>
</div>
<div class="portlet mgSection" id="ID_119">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Clinical_resources">Clinical resources</h1><a sid="119" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="https://www.omim.org/search?index=entry&amp;start=1&amp;limit=10&amp;sort=score%20desc&amp;field=number&amp;search=605253" target="_blank">OMIM</a></li><li><a href="http://www.orpha.net/consor/cgi-bin/OC_Exp.php?Expert=99951" target="_blank">Orphanet</a></li><li><a href="https://clinicaltrials.gov/search?cond=Charcot-Marie-Tooth%20disease%20type%204E" target="_blank">ClinicalTrials.gov</a></li></ul></div>
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<p class="address_footer text-white">National Library of Medicine<br />
<a href="https://www.google.com/maps/place/8600+Rockville+Pike,+Bethesda,+MD+20894/@38.9959508,-77.101021,17z/data=!3m1!4b1!4m5!3m4!1s0x89b7c95e25765ddb:0x19156f88b27635b8!8m2!3d38.9959508!4d-77.0988323" class="text-white" target="_blank" rel="noopener noreferrer">8600 Rockville Pike<br />
Bethesda, MD 20894</a></p>
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<p><a href="https://www.nlm.nih.gov/web_policies.html" class="text-white">Web Policies</a><br />
<a href="https://www.nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office" class="text-white">FOIA</a><br />
<a href="https://www.hhs.gov/vulnerability-disclosure-policy/index.html" class="text-white" id="vdp">HHS Vulnerability Disclosure</a></p>
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<div class="col-lg-3 col-12 centered-lg">
<p><a class="supportLink text-white" href="https://support.nlm.nih.gov/">Help</a><br />
<a href="https://www.nlm.nih.gov/accessibility.html" class="text-white">Accessibility</a><br />
<a href="https://www.nlm.nih.gov/careers/careers.html" class="text-white">Careers</a></p>
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<div class="row">
<div class="col-lg-12 centered-lg">
<nav class="bottom-links">
<ul class="mt-3">
<li>
<a class="text-white" href="//www.nlm.nih.gov/">NLM</a>
</li>
<li>
<a class="text-white" href="https://www.nih.gov/">NIH</a>
</li>
<li>
<a class="text-white" href="https://www.hhs.gov/">HHS</a>
</li>
<li>
<a class="text-white" href="https://www.usa.gov/">USA.gov</a>
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</ul>
</nav>
</div>
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