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<meta name="keywords" content="C1837091, chrne, cms id, cms id, formerly, cms1d, cms1d, formerly, cms4c, congenital myasthenic syndrome 4c, congenital myasthenic syndrome 4c associated with acetylcholine receptor deficiency, congenital myasthenic syndrome associated with acetylcholine receptor deficiency, congenital myasthenic syndrome type 4c, congenital myasthenic syndrome type id, congenital myasthenic syndrome-4c, disease or syndrome, familial infantile myasthenia 1, fim1, fim1, formerly, gfpt1, gfpt1-related congenital myasthenic syndrome, musk-related congenital myasthenic syndrome, myasthenia, familial infantile, 1, myasthenia, familial infantile, 1, formerly, myasthenic syndrome, congenital, 4c, associated with acetylcholine receptor deficiency, myasthenic syndrome, congenital, associated with acetylcholine receptor deficiency, myasthenic syndrome, congenital, postsynaptic, associated with acetylcholine receptor deficiency, myasthenic syndrome, congenital, type id, 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 myasthenic syndrome associated with AChR deficiency is a disorder of the postsynaptic neuromuscular junction (NMJ) clinically characterized by early-onset muscle weakness with variable severity. Electrophysiologic studies show low amplitude of the miniature endplate potential (MEPP) and current (MEPC) resulting from deficiency of AChR at the endplate. Patients with mutations in the CHRNE gene may have compensatory increased expression of the fetal subunit CHRNG (100730) and may respond to treatment with cholinergic agents, pyridostigmine, or amifampridine (summary by Engel et al., 2015).&#13; For a discussion of genetic heterogeneity of CMS, see CMS1A (601462)." /><meta name="robots" content="index,nofollow,noarchive" />
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<title>Congenital myasthenic syndrome 4C (Concept Id: C1837091)
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<!--
UID=373251
ConceptID=C1837091
-->
<!--imgCountBooks = 0--><h1 class="medgenTitle"><div class="MedGenTitleText">Congenital myasthenic syndrome 4C<span class="h1sub">(CMS4C)</span></div></h1><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>373251</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.">C1837091</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>CMS4C; GFPT1-Related Congenital Myasthenic Syndrome; MUSK-Related Congenital Myasthenic Syndrome; Myasthenic syndrome, congenital, associated with acetylcholine receptor deficiency; Myasthenic syndrome, congenital, postsynaptic, associated with acetylcholine receptor deficiency</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">Genes (locations):<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="CHRNE - ID: 1145 - NCBI Gene" href="/gene/1145" class="medgenPMinfo">CHRNE</a> (17p13.2); <a target="_blank" title="GFPT1 - ID: 2673 - NCBI Gene" href="/gene/2673" class="medgenPMinfo">GFPT1</a> (2p13.3)</td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td>Monarch Initiative:</td>
<td><a href="https://monarchinitiative.org/disease/MONDO:0012157" target="_blank">MONDO:0012157</a></td></tr>
<tr><td>OMIM<span class="superscript">®</span>:</td>
<td><a href="https://omim.org/entry/608931" target="_blank">608931</a></td></tr>
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<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 myasthenic syndrome associated with AChR deficiency is a disorder of the postsynaptic neuromuscular junction (NMJ) clinically characterized by early-onset muscle weakness with variable severity. Electrophysiologic studies show low amplitude of the miniature endplate potential (MEPP) and current (MEPC) resulting from deficiency of AChR at the endplate. Patients with mutations in the CHRNE gene may have compensatory increased expression of the fetal subunit CHRNG (100730) and may respond to treatment with cholinergic agents, pyridostigmine, or amifampridine (summary by Engel et al., 2015).&#13; For a discussion of genetic heterogeneity of CMS, see CMS1A (601462). [from <a title="Online Mendelian Inheritance in Man" href="http://www.omim.org" class="defSource" target="_blank">OMIM</a>]</div>
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<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_41440"><div><strong>Dysphagia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>41440</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.">C0011168</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Difficulty in swallowing.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/41440">Feature record</a> | <a href="/medgen?term=%22Dysphagia%22%5BClinical%20Features%5D%20OR%2041440%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_65429"><div><strong>Feeding difficulties</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>65429</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.">C0232466</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Impaired ability to eat related to problems gathering food and getting ready to suck, chew, or swallow it.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/65429">Feature record</a> | <a href="/medgen?term=%22Feeding%20difficulties%22%5BClinical%20Features%5D%20OR%2065429%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_8510"><div><strong>Dysarthria</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>8510</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.">C0013362</a></dd><dt><span class="dotprefix"></span></dt><dd>Mental or Behavioral Dysfunction</dd></dl></div></div></div>
<div class="spaceAbove">Dysarthric speech is a general description referring to a neurological speech disorder characterized by poor articulation. Depending on the involved neurological structures, dysarthria may be further classified as spastic, flaccid, ataxic, hyperkinetic and hypokinetic, or mixed.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/8510">Feature record</a> | <a href="/medgen?term=%22Dysarthria%22%5BClinical%20Features%5D%20OR%208510%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_451076"><div><strong>Fatigable weakness</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>451076</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.">C0947912</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">A type of weakness that occurs after a muscle group is used and lessens if the muscle group has some rest. That is, there is diminution of strength with repetitive muscle actions.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/451076">Feature record</a> | <a href="/medgen?term=%22Fatigable%20weakness%22%5BClinical%20Features%5D%20OR%20451076%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_373253"><div><strong>Easy fatigability</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>373253</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.">C1837098</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Increased susceptibility to fatigue.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/373253">Feature record</a> | <a href="/medgen?term=%22Easy%20fatigability%22%5BClinical%20Features%5D%20OR%20373253%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_871144"><div><strong>Decreased size of nerve terminals</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>871144</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.">C4025615</a></dd><dt><span class="dotprefix"></span></dt><dd>Anatomical Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">A reduction in the size of nerve terminals.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/871144">Feature record</a> | <a href="/medgen?term=%22Decreased%20size%20of%20nerve%20terminals%22%5BClinical%20Features%5D%20OR%20871144%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_10133"><div><strong>Hypotonia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>10133</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.">C0026827</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle). Even when relaxed, muscles have a continuous and passive partial contraction which provides some resistance to passive stretching. Hypotonia thus manifests as diminished resistance to passive stretching. Hypotonia is not the same as muscle weakness, although the two conditions can co-exist.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/10133">Feature record</a> | <a href="/medgen?term=%22Hypotonia%22%5BClinical%20Features%5D%20OR%2010133%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_52431"><div><strong>Muscle spasm</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>52431</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.">C0037763</a></dd><dt><span class="dotprefix"></span></dt><dd>Sign or Symptom</dd></dl></div></div></div>
<div class="spaceAbove">Sudden and involuntary contractions of one or more muscles.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/52431">Feature record</a> | <a href="/medgen?term=%22Muscle%20spasm%22%5BClinical%20Features%5D%20OR%2052431%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_65865"><div><strong>Gowers sign</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>65865</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.">C0234182</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">A phenomenon whereby patients are not able to stand up without the use of the hands owing to weakness of the proximal muscles of the lower limbs.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/65865">Feature record</a> | <a href="/medgen?term=%22Gowers%20sign%22%5BClinical%20Features%5D%20OR%2065865%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_87660"><div><strong>Facial palsy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>87660</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.">C0376175</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Facial nerve palsy is a dysfunction of cranial nerve VII (the facial nerve) that results in inability to control facial muscles on the affected side with weakness of the muscles of facial expression and eye closure. This can either be present in unilateral or bilateral form.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/87660">Feature record</a> | <a href="/medgen?term=%22Facial%20palsy%22%5BClinical%20Features%5D%20OR%2087660%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_892680"><div><strong>Muscular atrophy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>892680</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.">C0541794</a></dd><dt><span class="dotprefix"></span></dt><dd>Pathologic Function</dd></dl></div></div></div>
<div class="spaceAbove">The presence of skeletal muscular atrophy (which is also known as amyotrophy).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/892680">Feature record</a> | <a href="/medgen?term=%22Muscular%20atrophy%22%5BClinical%20Features%5D%20OR%20892680%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_373256"><div><strong>Decreased muscle mass</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>373256</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.">C1837108</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove nowrap">See: <a href="/medgen/373256">Feature record</a> | <a href="/medgen?term=%22Decreased%20muscle%20mass%22%5BClinical%20Features%5D%20OR%20373256%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_346841"><div><strong>Generalized hypotonia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>346841</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.">C1858120</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Generalized muscular hypotonia (abnormally low muscle tone).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/346841">Feature record</a> | <a href="/medgen?term=%22Generalized%20hypotonia%22%5BClinical%20Features%5D%20OR%20346841%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_355249"><div><strong>Type 2 muscle fiber atrophy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>355249</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.">C1864580</a></dd><dt><span class="dotprefix"></span></dt><dd>Pathologic Function</dd></dl></div></div></div>
<div class="spaceAbove">Atrophy (wasting) affecting primary type 2 muscle fibers. This feature in general can only be observed on muscle biopsy.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/355249">Feature record</a> | <a href="/medgen?term=%22Type%202%20muscle%20fiber%20atrophy%22%5BClinical%20Features%5D%20OR%20355249%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_892749"><div><strong>EMG: decremental response of compound muscle action potential to repetitive nerve stimulation</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>892749</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.">C4021728</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">A compound muscle action potential (CMAP) is a type of electromyography (EMG). CMAP refers to a group of almost simultaneous action potentials from several muscle fibers in the same area evoked by stimulation of the supplying motor nerve and are recorded as one multipeaked summated action potential. This abnormality refers to a greater than normal decrease in the amplitude during the course of the investigation.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/892749">Feature record</a> | <a href="/medgen?term=%22EMG%3A%20decremental%20response%20of%20compound%20muscle%20action%20potential%20to%20repetitive%20nerve%20stimulation%22%5BClinical%20Features%5D%20OR%20892749%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_1830310"><div><strong>Arthrogryposis multiplex congenita</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1830310</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.">C5779613</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Multiple congenital contractures in different body areas.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1830310">Feature record</a> | <a href="/medgen?term=%22Arthrogryposis%20multiplex%20congenita%22%5BClinical%20Features%5D%20OR%201830310%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_812797"><div><strong>Respiratory insufficiency due to muscle weakness</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>812797</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.">C3806467</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove nowrap">See: <a href="/medgen/812797">Feature record</a> | <a href="/medgen?term=%22Respiratory%20insufficiency%20due%20to%20muscle%20weakness%22%5BClinical%20Features%5D%20OR%20812797%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_65892"><div><strong>Weak cry</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>65892</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.">C0234860</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove nowrap">See: <a href="/medgen/65892">Feature record</a> | <a href="/medgen?term=%22Weak%20cry%22%5BClinical%20Features%5D%20OR%2065892%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_9869"><div><strong>Dental malocclusion</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>9869</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.">C0024636</a></dd><dt><span class="dotprefix"></span></dt><dd>Anatomical Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Dental malocclusion refers to an abnormality of the occlusion, or alignment, of the teeth and the way the upper and lower teeth fit together, resulting in overcrowding of teeth or in abnormal bite patterns.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/9869">Feature record</a> | <a href="/medgen?term=%22Dental%20malocclusion%22%5BClinical%20Features%5D%20OR%209869%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_66814"><div><strong>High palate</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>66814</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.">C0240635</a></dd><dt><span class="dotprefix"></span></dt><dd>Congenital Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Height of the palate more than 2 SD above the mean (objective) or palatal height at the level of the first permanent molar more than twice the height of the teeth (subjective).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/66814">Feature record</a> | <a href="/medgen?term=%22High%20palate%22%5BClinical%20Features%5D%20OR%2066814%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_98316"><div><strong>Mandibular prognathia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>98316</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.">C0399526</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Abnormal prominence of the chin related to increased length of the mandible.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/98316">Feature record</a> | <a href="/medgen?term=%22Mandibular%20prognathia%22%5BClinical%20Features%5D%20OR%2098316%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_324419"><div><strong>Long face</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>324419</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.">C1836047</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Facial height (length) is more than 2 standard deviations above the mean (objective); or, an apparent increase in the height (length) of the face (subjective).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/324419">Feature record</a> | <a href="/medgen?term=%22Long%20face%22%5BClinical%20Features%5D%20OR%20324419%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_68618"><div><strong>Decreased fetal movement</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>68618</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.">C0235659</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">An abnormal reduction in quantity or strength of fetal movements.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/68618">Feature record</a> | <a href="/medgen?term=%22Decreased%20fetal%20movement%22%5BClinical%20Features%5D%20OR%2068618%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_2287"><div><strong>Ptosis</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>2287</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.">C0005745</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">The upper eyelid margin is positioned 3 mm or more lower than usual and covers the superior portion of the iris (objective); or, the upper lid margin obscures at least part of the pupil (subjective).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/2287">Feature record</a> | <a href="/medgen?term=%22Ptosis%22%5BClinical%20Features%5D%20OR%202287%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_21337"><div><strong>Strabismus</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>21337</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.">C0038379</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">A misalignment of the eyes so that the visual axes deviate from bifoveal fixation. The classification of strabismus may be based on a number of features including the relative position of the eyes, whether the deviation is latent or manifest, intermittent or constant, concomitant or otherwise and according to the age of onset and the relevance of any associated refractive error.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/21337">Feature record</a> | <a href="/medgen?term=%22Strabismus%22%5BClinical%20Features%5D%20OR%2021337%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_155551"><div><strong>Ophthalmoparesis</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>155551</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.">C0751401</a></dd><dt><span class="dotprefix"></span></dt><dd>Sign or Symptom</dd></dl></div></div></div>
<div class="spaceAbove">Ophthalmoplegia is a paralysis or weakness of one or more of the muscles that control eye movement.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/155551">Feature record</a> | <a href="/medgen?term=%22Ophthalmoparesis%22%5BClinical%20Features%5D%20OR%20155551%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 head or neck</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_9869" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Dental malocclusion</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_66814" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">High palate</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_324419" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Long face</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_98316" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Mandibular prognathia</a></span></li></ul></li><li><span class="TLline">Abnormality of prenatal development or birth</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_68618" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Decreased fetal movement</a></span></li></ul></li><li><span class="TLline">Abnormality of the digestive system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_41440" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Dysphagia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_65429" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Feeding difficulties</a></span></li></ul></li><li><span class="TLline">Abnormality of the eye</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_155551" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Ophthalmoparesis</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_2287" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Ptosis</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_21337" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Strabismus</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_1830310" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Arthrogryposis multiplex congenita</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_373256" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Decreased muscle mass</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_892749" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">EMG: decremental response of compound muscle action potential to repetitive nerve stimulation</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_87660" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Facial palsy</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_346841" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Generalized hypotonia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_65865" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Gowers sign</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_10133" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hypotonia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_52431" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Muscle spasm</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_892680" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Muscular atrophy</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_355249" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Type 2 muscle fiber atrophy</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_871144" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Decreased size of nerve terminals</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_8510" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Dysarthria</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_373253" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Easy fatigability</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_451076" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Fatigable weakness</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></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_812797" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Respiratory insufficiency due to muscle weakness</a></span></li></ul></li><li><span class="TLline">Abnormality of the voice</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_65892" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Weak cry</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=C0751882[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=155650">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/NBK1168/" ref="ncbi_uid=155650">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=155650" ref="ncbi_uid=155650">V</a></span></span><span class="TLline"><a href="/medgen/155650" ref="tree=GTR&amp;ncbi_uid=155650&amp;link_uid=155650" title="View MedGen record for 'Congenital myasthenic syndrome'">Congenital myasthenic syndrome</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=CN119608[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=468519">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/NBK1168/" ref="ncbi_uid=468519">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=468519" ref="ncbi_uid=468519">V</a></span></span><span class="TLline"><a href="/medgen/468519" ref="tree=GTR&amp;ncbi_uid=468519&amp;link_uid=468519" title="View MedGen record for 'CHRNA1-Related Congenital Myasthenic Syndrome'">CHRNA1-Related Congenital Myasthenic Syndrome</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=C2931107[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=419336">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/NBK1168/" ref="ncbi_uid=419336">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=419336" ref="ncbi_uid=419336">V</a></span></span><span class="TLline"><a href="/medgen/419336" ref="tree=GTR&amp;ncbi_uid=419336&amp;link_uid=419336" title="View MedGen record for 'Congenital myasthenic syndrome 1A'">Congenital myasthenic syndrome 1A</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=C4225405[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=909200">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=909200" target="_blank" href="/omim/100690">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1168/" ref="ncbi_uid=909200">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=909200" ref="ncbi_uid=909200">V</a></span></span><span class="TLline"><a href="/medgen/909200" ref="tree=GTR&amp;ncbi_uid=909200&amp;link_uid=909200" title="View MedGen record for 'Myasthenic syndrome, congenital, 1B, fast-channel'">Myasthenic syndrome, congenital, 1B, fast-channel</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=C1864233[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=400481">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=400481" target="_blank" href="/omim/603033">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1168/" ref="ncbi_uid=400481">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=400481" ref="ncbi_uid=400481">V</a></span></span><span class="TLline"><a href="/medgen/400481" ref="tree=GTR&amp;ncbi_uid=400481&amp;link_uid=400481" title="View MedGen record for 'Congenital myasthenic syndrome 5'">Congenital myasthenic syndrome 5</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=C1850792[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=376880">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=376880" target="_blank" href="/omim/254300">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1168/" ref="ncbi_uid=376880">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=376880" ref="ncbi_uid=376880">V</a></span></span><span class="TLline"><a href="/medgen/376880" ref="tree=GTR&amp;ncbi_uid=376880&amp;link_uid=376880" title="View MedGen record for 'Congenital myasthenic syndrome 10'">Congenital myasthenic syndrome 10</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=C3280112[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=481742">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=481742" target="_blank" href="/omim/603967">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1168/" ref="ncbi_uid=481742">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=481742" ref="ncbi_uid=481742">V</a></span></span><span class="TLline"><a href="/medgen/481742" ref="tree=GTR&amp;ncbi_uid=481742&amp;link_uid=481742" title="View MedGen record for 'Congenital myasthenic syndrome 16'">Congenital myasthenic syndrome 16</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=C1837091[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=373251">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=373251" target="_blank" href="/omim/100725">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1168/" ref="ncbi_uid=373251">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=373251" ref="ncbi_uid=373251">V</a></span></span><span class="TLline">Congenital myasthenic syndrome 4C</span></li><li class="TLclosed"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C0393929[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=140751">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=140751" target="_blank" href="/omim/118490">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK1168/" ref="ncbi_uid=140751">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=140751" ref="ncbi_uid=140751">V</a></span></span><span class="TLline"><a href="/medgen/140751" ref="tree=GTR&amp;ncbi_uid=140751&amp;link_uid=140751" title="View MedGen record for 'Familial infantile myasthenia'">Familial infantile myasthenia</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=C0751885[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=199759">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/NBK1168/" ref="ncbi_uid=199759">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=199759" ref="ncbi_uid=199759">V</a></span></span><span class="TLline"><a href="/medgen/199759" ref="tree=GTR&amp;ncbi_uid=199759&amp;link_uid=199759" title="View MedGen record for 'Myasthenic syndrome, slow-channel congenital'">Myasthenic syndrome, slow-channel congenital</a></span></li></ul></li></ul></div></div></div></div></div><div id="tabMGEN"><div class="ds_tree"><ul><li><span class="TLline"><a href="/medgen/14319" ref="tree=MeSH" title="MedGen record for Congenital, Hereditary, and Neonatal Diseases and Abnormalities">Congenital, Hereditary, and Neonatal Diseases and Abnormalities</a></span><ul><li><span class="TLline"><a href="/medgen/181981" ref="tree=MeSH" title="MedGen record for Inborn genetic diseases">Inborn genetic diseases</a></span><ul><li><span class="TLline"><a href="/medgen/155650" ref="tree=MeSH" title="MedGen record for Congenital myasthenic syndrome">Congenital myasthenic syndrome</a></span><ul><li><span class="matched_ds">Congenital myasthenic syndrome 4C</span></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></div></div></div></div></div></div>
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<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=C1837091%5bDISCUI%5d&amp;filter=method%3A2%5F8" target="_blank">Deletion/duplication analysis (33)</a></li>
<li><a href="/gtr/tests?term=C1837091%5bDISCUI%5d&amp;filter=method%3A1%5F2" target="_blank">Enzyme assay (3)</a></li>
<li><a href="/gtr/tests?term=C1837091%5bDISCUI%5d&amp;filter=method%3A2%5F12" target="_blank">Microsatellite instability testing (MSI) (1)</a></li>
<li><a href="/gtr/tests?term=C1837091%5bDISCUI%5d&amp;filter=method%3A2%5F18" target="_blank">Mutation scanning of select exons (1)</a></li>
<li><a href="/gtr/tests?term=C1837091%5bDISCUI%5d&amp;filter=method%3A2%5F9" target="_blank">Sequence analysis of select exons (12)</a></li>
<li><a href="/gtr/tests?term=C1837091%5bDISCUI%5d&amp;filter=method%3A2%5F7" target="_blank">Sequence analysis of the entire coding region (57)</a></li>
<li><a href="/gtr/tests?term=C1837091%5bDISCUI%5d&amp;filter=method%3A2%5F19" target="_blank">Targeted variant analysis (12)</a></li>
<li class="portletSeeAll portletSeeAllPad"><total><a href="/gtr/tests?term=C1837091%5bDISCUI%5d" target="_blank">See all (62)</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=608931" target="_blank">OMIM</a></li><li><a href="https://clinicaltrials.gov/search?cond=Congenital%20myasthenic%20syndrome%204C" target="_blank">ClinicalTrials.gov</a></li></ul></div>
</div>
<div class="portlet mgSection" id="ID_115">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Molecular_resources">Molecular resources</h1><a sid="115" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="http://www.omim.org/search?index=entry&amp;start=1&amp;limit=10&amp;sort=score%20desc&amp;field=number&amp;search=100725%20138292" target="_blank">OMIM</a></li><li><a href="/clinvar/?term=1145[geneid]" target="_blank">View CHRNE variations in ClinVar</a></li><li><a href="/clinvar/?term=2673[geneid]" target="_blank">View GFPT1 variations in ClinVar</a></li><li><a href="/nuccore/324120890" target="_blank">RefSeqGene</a></li><li><a href="https://catalog.coriell.org/Search?q=608931" target="_blank">Coriell Institute for Medical Research</a></li></ul></div>
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<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Consumer_resources">Consumer resources</h1><a sid="116" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="http://www.diseaseinfosearch.org/Myasthenic+syndrome%2C+congenital%2C+associated+with+acetylcholine+receptor+deficiency/5000" target="_blank">Genetic Alliance</a></li><li><a href="https://www.malacards.org/card/myasthenic_syndrome_congenital_4c_associated_with_acetylcholine_receptor_deficiency" target="_blank">MalaCards</a></li><li><a href="https://vsearch.nlm.nih.gov/vivisimo/cgi-bin/query-meta?v:project=medlineplus&amp;query=Congenital%20myasthenic%20syndrome%204C" target="_blank">MedlinePlus</a></li><li><a href="https://rarediseases.info.nih.gov/diseases/10108/disease" target="_blank">NCATS Office of Rare Diseases Research (GARD)</a></li></ul></div>
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<h3>Reviews</h3>
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<a href="/pubmed/20301347" ref="ncbi_uid=&amp;discoId=gtr_reviews&amp;linkpos=1&amp;linkpostotal=3" target="_blank"><span class="gene_reviews">GeneReviews</span></a>
</li>
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<a href="/pubmed/clinical?term=Congenital%20myasthenic%20syndrome%204C" ref="ncbi_uid=&amp;discoId=gtr_reviews&amp;linkpos=2&amp;linkpostotal=3" target="_blank">PubMed Clinical Queries</a>
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<a href="/pubmed?term=Congenital%20myasthenic%20syndrome%204C%20AND%20humans[mesh]%20AND%20review[publication%20type]" ref="ncbi_uid=&amp;discoId=gtr_reviews&amp;linkpos=3&amp;linkpostotal=3" target="_blank">Reviews in PubMed</a>
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<h3>Related information</h3>
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<a class="brieflinkpopperctrl" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=373251" ref="log$=recordlinks">ClinVar</a>
<div class="brieflinkpop offscreen_noflow">Related medical variations</div>
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<a class="brieflinkpopperctrl" href="/gene?LinkName=medgen_gene_diseases&amp;from_uid=373251" ref="log$=recordlinks">Gene</a>
<div class="brieflinkpop offscreen_noflow">Related information in NCBI Gene</div>
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<a class="brieflinkpopperctrl" href="/gtr/tests?term=C1837091[DISCUI]" ref="log$=recordlinks">GTR</a>
<div class="brieflinkpop offscreen_noflow">Related information in GTR</div>
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<a class="brieflinkpopperctrl" href="/gtr/tests?term=C1837091[DISCUI]&amp;test_type=Clinical" ref="log$=recordlinks">GTR(Clinical)</a>
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<a class="brieflinkpopperctrl" href="/books?LinkName=medgen_books&amp;from_uid=373251" ref="log$=recordlinks">NCBI Bookshelf</a>
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<a class="brieflinkpopperctrl" href="/pubmed?LinkName=medgen_pubmed&amp;from_uid=373251" ref="log$=recordlinks">PubMed</a>
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<a class="brieflinkpopperctrl" href="/pubmed?LinkName=medgen_pubmed_bookshelf_cited&amp;from_uid=373251" ref="log$=recordlinks">PubMed (Bookshelf cited)</a>
<div class="brieflinkpop offscreen_noflow">Links to PubMed based on citations in GeneReviews and Medical Genetics Summaries</div>
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<a class="brieflinkpopperctrl" href="/pubmed?LinkName=medgen_pubmed_genereviews&amp;from_uid=373251" ref="log$=recordlinks">PubMed (GeneReviews)</a>
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<a class="brieflinkpopperctrl" href="/pubmed?LinkName=medgen_pubmed_omim&amp;from_uid=373251" ref="log$=recordlinks">PubMed (OMIM)</a>
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<a class="htb ralinkpopperctrl" ref="log$=activity&amp;linkpos=1" href="/portal/utils/pageresolver.fcgi?recordid=67d386c284f3725e595b154b">Congenital myasthenic syndrome 4C</a>
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