nih-gov/www.ncbi.nlm.nih.gov/omim/617519

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<title>
Entry
- #617519 - NEURODEVELOPMENTAL DISORDER WITH HYPOTONIA, NEUROPATHY, AND DEAFNESS; NEDHND
- OMIM
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<span class="h4">#617519</span>
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<strong>Table of Contents</strong>
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<a href="#title"><strong>Title</strong></a>
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<a href="#phenotypeMap"><strong>Phenotype-Gene Relationships</strong></a>
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<a href="/clinicalSynopsis/617519"><strong>Clinical Synopsis</strong></a>
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<a href="#text"><strong>Text</strong></a>
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<a href="#clinicalFeatures">Clinical Features</a>
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<a href="#inheritance">Inheritance</a>
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<a href="#molecularGenetics">Molecular Genetics</a>
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<a href="#animalModel">Animal Model</a>
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<a href="#references"><strong>References</strong></a>
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<a href="#creationDate"><strong>Creation Date</strong></a>
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<div><a href="https://clinicaltrials.gov/search?cond=NEURODEVELOPMENTAL DISORDER WITH HYPOTONIA, NEUROPATHY, AND DEAFNESS" class="mim-tip-hint" title="A registry of federally and privately supported clinical trials conducted in the United States and around the world." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Clinical Trials', 'domain': 'clinicaltrials.gov'})">Clinical Trials</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/books/NBK559435/" class="mim-tip-hint" title="Expert-authored, peer-reviewed descriptions of inherited disorders including the uses of genetic testing in diagnosis, management, and genetic counseling." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Gene Reviews', 'domain': 'ncbi.nlm.nih.gov'})">Gene Reviews</a></div>
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617519
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NEURODEVELOPMENTAL DISORDER WITH HYPOTONIA, NEUROPATHY, AND DEAFNESS; NEDHND
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</div>
<div>
<a id="alternativeTitles" class="mim-anchor"></a>
<div>
<p>
<span class="mim-font">
<em>Alternative titles; symbols</em>
</span>
</p>
</div>
<div>
<h4>
<span class="mim-font">
MYOPATHY, CONGENITAL, WITH NEUROPATHY AND DEAFNESS; CMND
</span>
</h4>
</div>
</div>
<div>
<br />
</div>
</div>
<div>
<a id="phenotypeMap" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>Phenotype-Gene Relationships</strong>
</span>
</h4>
<div>
<table class="table table-bordered table-condensed table-hover small mim-table-padding">
<thead>
<tr class="active">
<th>
Location
</th>
<th>
Phenotype
</th>
<th>
Phenotype <br /> MIM number
</th>
<th>
Inheritance
</th>
<th>
Phenotype <br /> mapping key
</th>
<th>
Gene/Locus
</th>
<th>
Gene/Locus <br /> MIM number
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/706?start=-3&limit=10&highlight=706">
19q13.2
</a>
</span>
</td>
<td>
<span class="mim-font">
Neurodevelopmental disorder with hypotonia, neuropathy, and deafness
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617519"> 617519 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
SPTBN4
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606214"> 606214 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="btn-group ">
<a href="/clinicalSynopsis/617519" class="btn btn-warning" role="button"> Clinical Synopsis </a>
<button type="button" id="mimPhenotypicSeriesToggle" class="btn btn-warning dropdown-toggle mimSingletonFoldToggle" data-toggle="collapse" href="#mimClinicalSynopsisFold" onclick="ga('send', 'event', 'Unfurl', 'ClinicalSynopsis', 'omim.org')">
<span class="caret"></span>
<span class="sr-only">Toggle Dropdown</span>
</button>
</div>
&nbsp;
<div class="btn-group">
<button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
PheneGene Graphics <span class="caret"></span>
</button>
<ul class="dropdown-menu" style="width: 17em;">
<li><a href="/graph/linear/617519" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/617519" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Radial'})"> Radial </a></li>
</ul>
</div>
<span class="glyphicon glyphicon-question-sign mim-tip-hint" title="OMIM PheneGene graphics depict relationships between phenotypes, groups of related phenotypes (Phenotypic Series), and genes.<br /><a href='/static/omim/pdf/OMIM_Graphics.pdf' target='_blank'>A quick reference overview and guide (PDF)</a>"></span>
<div>
<p />
</div>
<div id="mimClinicalSynopsisFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small" style="margin: 5px">
<div>
<div>
<span class="h5 mim-font">
<strong> INHERITANCE </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Autosomal recessive <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/258211005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">258211005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0441748&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0441748</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> HEAD & NECK </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Head </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Absent head control <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4479604&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4479604</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Face </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Facial weakness <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/95666008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">95666008</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R29.810" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R29.810</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/438.83" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">438.83</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/781.94" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">781.94</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0427055&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0427055</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0007209" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0007209</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0030319" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0030319</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0030319" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0030319</a>]</span><br /> -
Myopathic facies <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/26432009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">26432009</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0332615&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0332615</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002058" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002058</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002058" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002058</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Ears </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Deafness, central <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/68467004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">68467004</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/H90.5" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H90.5</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/389.14" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">389.14</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0018776&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0018776</a>]</span><br /> -
Auditory neuropathy <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/443805006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">443805006</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1852271&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1852271</a>, <a href="https://bioportal.bioontology.org/search?q=C2732267&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2732267</a>]</span><br /> -
Absent brainstem evoked potentials <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4479605&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4479605</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Eyes </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Cortical visual impairment <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/413924001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">413924001</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/432141000124105" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">432141000124105</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4048268&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4048268</a>, <a href="https://bioportal.bioontology.org/search?q=C3810365&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3810365</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0100704" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0100704</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0100704" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0100704</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Mouth </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- High-arched palate <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/27272007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">27272007</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q38.5" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q38.5</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0240635&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0240635</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000218" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000218</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000218" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000218</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> ABDOMEN </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Gastrointestinal </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Feeding difficulties <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/78164000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">78164000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R63.3" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R63.3</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0232466&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0232466</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0011968" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0011968</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0011968" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0011968</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> SKELETAL </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Spine </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Scoliosis <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/298382003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">298382003</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/20944008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">20944008</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/111266001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">111266001</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/M41.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">M41.9</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/M41" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">M41</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/Q67.5" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q67.5</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0559260&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0559260</a>, <a href="https://bioportal.bioontology.org/search?q=C0036439&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0036439</a>, <a href="https://bioportal.bioontology.org/search?q=C0700208&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0700208</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002650" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002650</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002650" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002650</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Feet </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Ankle contractures <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/239740007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">239740007</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0343148&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0343148</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0034677" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0034677</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MUSCLE, SOFT TISSUES </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Hypotonia, severe <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1839630&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1839630</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0006829" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0006829</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0006829" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0006829</a>]</span> <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/398151007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">398151007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/398152000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">398152000</a>]</span><br /> -
Generalized muscle atrophy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1389113&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1389113</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003700" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003700</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003700" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003700</a>]</span><br /> -
Type 1 fiber atrophy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1850688&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1850688</a>]</span><br /> -
Neurogenic pattern seen on EMG <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4313436&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4313436</a>]</span><br /> -
Denervation atrophy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0877271&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0877271</a>]</span><br />
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<strong> NEUROLOGIC </strong>
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<em> Central Nervous System </em>
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- Delayed psychomotor development, profound <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3278113&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3278113</a>]</span> <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/224958001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">224958001</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/F88" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">F88</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001263" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001263</a>]</span><br /> -
Hypotonia, profound <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4227997&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4227997</a>]</span> <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/398151007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">398151007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/398152000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">398152000</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001252" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001252</a>]</span><br /> -
Inability to sit or stand <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4479571&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4479571</a>]</span><br /> -
Absent speech <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1854882&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1854882</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001344" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001344</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001344" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001344</a>]</span><br /> -
Seizures (in some patients) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/91175000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">91175000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0036572&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0036572</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001250" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001250</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001250" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001250</a>]</span><br />
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<em> Peripheral Nervous System </em>
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- Areflexia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/37280007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">37280007</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0234146&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0234146</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001284" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001284</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001284" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001284</a>]</span><br /> -
Axonal and demyelinating peripheral neuropathy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C2677557&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2677557</a>]</span><br />
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<span class="h5 mim-font">
<strong> LABORATORY ABNORMALITIES </strong>
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<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Normal serum creatine kinase <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1850678&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1850678</a>]</span><br />
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<span class="h5 mim-font">
<strong> MISCELLANEOUS </strong>
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<div>
<span class="mim-font">
- Onset at birth <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836142&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836142</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003577" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003577</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0003577" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0003577</a>]</span><br />
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<span class="h5 mim-font">
<strong> MOLECULAR BASIS </strong>
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- Caused by mutation in the nonerythrocytic beta-spectrin 4 gene (SPTBN4, <a href="/entry/606214#0001">606214.0001</a>)<br />
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<a href="#mimClinicalSynopsisFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
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<p>A number sign (#) is used with this entry because of evidence that neurodevelopmental disorder with hypotonia, neuropathy, and deafness (NEDHND) is caused by homozygous or compound heterozygous mutation in the SPTBN4 gene (<a href="/entry/606214">606214</a>) on chromosome 19q13.</p>
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<strong>Clinical Features</strong>
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<p><a href="#3" class="mim-tip-reference" title="Knierim, E., Gill, E., Seifert, F., Morales-Gonzalez, S., Unudurthi, S. D., Hund, T. J., Stenzel, W., Schuelke, M. &lt;strong&gt;A recessive mutation in beta-IV-spectrin (SPTBN4) associates with congenital myopathy, neuropathy, and central deafness.&lt;/strong&gt; Hum. Genet. 136: 903-910, 2017.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/28540413/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;28540413&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s00439-017-1814-7&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="28540413">Knierim et al. (2017)</a> reported a boy, born of consanguineous Kurdish parents, with NEDHND. He presented soon after birth with hypotonia, facial weakness, and areflexia. He had delayed motor development and feeding difficulties, and he never achieved head control. At age 10 years, he had myopathic facies, high-arched palate, severe distal muscle weakness, generalized muscle atrophy, scoliosis, ankle contractures, and severely delayed motor and mental development with inability to stand, sit, eat, or speak. Muscle biopsy showed type 1 fiber atrophy, but serum creatine kinase was normal. He also had central deafness with absent brainstem-evoked potentials and a combined axonal and demyelinating motor neuropathy. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=28540413" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#5" class="mim-tip-reference" title="Wang, C.-C., Ortiz-Gonzalez, S. R., Yum, S. W., Gill, S. M., White, A., Kelter, E., Seaver, L. H., Lee, S., Wiley, G., Gaffney, P. M., Wierenga, K. J., Rasband, M. N. &lt;strong&gt;Beta-IV spectrinopathies cause profound intellectual disability, congenital hypotonia, and motor axonal neuropathy.&lt;/strong&gt; Am. J. Hum. Genet. 102: 1158-1168, 2018.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/29861105/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;29861105&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ajhg.2018.04.012&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="29861105">Wang et al. (2018)</a> reported 6 patients from 5 unrelated families with a severe neurodevelopmental disorder apparent from birth. The patients had congenital hypotonia, profound weakness with areflexia, respiratory and feeding difficulties, and profound developmental delay with no language development. They were unable to sit unsupported and were nonambulatory. Electrophysiologic studies in 3 patients showed a motor neuronopathy/axonopathy that was documented to be progressive in 1 patient. Muscle biopsy showed denervated and atrophic muscle, consistent with a neurogenic disease. Three patients had seizures, including 2 with severe intractable epilepsy. Additional features included cortical visual impairment and deafness due to auditory neuropathy. <a href="#5" class="mim-tip-reference" title="Wang, C.-C., Ortiz-Gonzalez, S. R., Yum, S. W., Gill, S. M., White, A., Kelter, E., Seaver, L. H., Lee, S., Wiley, G., Gaffney, P. M., Wierenga, K. J., Rasband, M. N. &lt;strong&gt;Beta-IV spectrinopathies cause profound intellectual disability, congenital hypotonia, and motor axonal neuropathy.&lt;/strong&gt; Am. J. Hum. Genet. 102: 1158-1168, 2018.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/29861105/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;29861105&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ajhg.2018.04.012&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="29861105">Wang et al. (2018)</a> concluded that the muscle weakness in these patients was primarily due to severe motor axonal neuropathy and neuronopathy as opposed to a myopathy. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=29861105" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="inheritance" class="mim-anchor"></a>
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<strong>Inheritance</strong>
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<p>The transmission pattern of NEDHND in the family reported by <a href="#3" class="mim-tip-reference" title="Knierim, E., Gill, E., Seifert, F., Morales-Gonzalez, S., Unudurthi, S. D., Hund, T. J., Stenzel, W., Schuelke, M. &lt;strong&gt;A recessive mutation in beta-IV-spectrin (SPTBN4) associates with congenital myopathy, neuropathy, and central deafness.&lt;/strong&gt; Hum. Genet. 136: 903-910, 2017.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/28540413/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;28540413&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s00439-017-1814-7&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="28540413">Knierim et al. (2017)</a> was consistent with autosomal recessive inheritance. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=28540413" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>Molecular Genetics</strong>
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<p>In a boy, born of consanguineous Kurdish parents, with NEDHND, <a href="#3" class="mim-tip-reference" title="Knierim, E., Gill, E., Seifert, F., Morales-Gonzalez, S., Unudurthi, S. D., Hund, T. J., Stenzel, W., Schuelke, M. &lt;strong&gt;A recessive mutation in beta-IV-spectrin (SPTBN4) associates with congenital myopathy, neuropathy, and central deafness.&lt;/strong&gt; Hum. Genet. 136: 903-910, 2017.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/28540413/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;28540413&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s00439-017-1814-7&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="28540413">Knierim et al. (2017)</a> identified a homozygous truncating mutation in the SPTBN4 gene (Q533X; <a href="/entry/606214#0001">606214.0001</a>). The mutation, which was found by a combination of autozygosity mapping and whole-exome sequencing, was confirmed by Sanger sequencing and segregated with the disorder in the family. Western blot analysis of patient fibroblasts showed absence of the SPTBN4 protein, and immunostaining of patient muscle sample showed absence of SPTBN4 at the sarcolemma. The phenotype was similar to that of the 'quivering' mouse, which results from a homozygous loss-of-function mutation in the Sptnb4 gene. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=28540413" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In 6 patients from 5 unrelated families with NEDHND, <a href="#5" class="mim-tip-reference" title="Wang, C.-C., Ortiz-Gonzalez, S. R., Yum, S. W., Gill, S. M., White, A., Kelter, E., Seaver, L. H., Lee, S., Wiley, G., Gaffney, P. M., Wierenga, K. J., Rasband, M. N. &lt;strong&gt;Beta-IV spectrinopathies cause profound intellectual disability, congenital hypotonia, and motor axonal neuropathy.&lt;/strong&gt; Am. J. Hum. Genet. 102: 1158-1168, 2018.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/29861105/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;29861105&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ajhg.2018.04.012&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="29861105">Wang et al. (2018)</a> identified homozygous or compound heterozygous mutations in the SPTBN4 gene (see, e.g., <a href="/entry/606214#0002">606214.0002</a>-<a href="/entry/606214#0006">606214.0006</a>). The mutations were found by exome sequencing; confirmed segregation of the mutations with the disorder was only possible in 1 family (family A). All patients except 1 (patient from family C) carried biallelic nonsense or frameshift mutations predicted to result in a complete loss of function. The patient from family C carried compound heterozygous missense mutations (R504Q, <a href="/entry/606214#0004">606214.0004</a> and R2435C, <a href="/entry/606214#0005">606214.0005</a>). Five of the 7 variants were located N-terminal to SR10 and were predicted to affect only the longer sigma-1 splice variant; SR15 mediates the interaction with ankyrin-G (ANK3; <a href="/entry/600465">600465</a>). The equivalent human variants in mouse Sptbn4 were expressed in cultured rat hippocampal neurons. Most of the truncating variants failed to localize to the axon initial segments (AIS) due to an inability to interact with ANK3, whereas the 2 missense variants and 1 C-terminal frameshift mutation (c.7453delG; <a href="/entry/606214#0006">606214.0006</a>) were able to interact with ANK3 and localized properly to the AIS. The c.7453delG mutant was abnormally present in small intracellular puncta rather than normal diffuse distribution, suggesting that the mutation disrupted the PH domain and altered the distribution of SPTBN4 in membrane compartments. The mutant protein was also unable to bind phosphoinositides, further demonstrating an adverse effect on PH domain function. Examination of the nodes of Ranvier was possible for 2 patients. Sural nerve biopsy from the patient with a homozygous truncating mutation (W903X; <a href="/entry/606214#0003">606214.0003</a>) that affected only the sigma-1 variant showed significantly reduced neurofascin labeling at the nodes of Ranvier as well as decreased immunostaining for certain sodium and potassium channels and nearly undetectable nodal immunoreactivity for the shorter SPTBN4 isoform (sigma-6). The findings indicated that sigma-6 is not sufficient to rescue nodal abnormalities. Sural nerve biopsy from the patient with compound heterozygous missense mutations showed fairly normal structure at the nodes of Ranvier, with a small reduction in potassium channels. <a href="#5" class="mim-tip-reference" title="Wang, C.-C., Ortiz-Gonzalez, S. R., Yum, S. W., Gill, S. M., White, A., Kelter, E., Seaver, L. H., Lee, S., Wiley, G., Gaffney, P. M., Wierenga, K. J., Rasband, M. N. &lt;strong&gt;Beta-IV spectrinopathies cause profound intellectual disability, congenital hypotonia, and motor axonal neuropathy.&lt;/strong&gt; Am. J. Hum. Genet. 102: 1158-1168, 2018.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/29861105/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;29861105&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ajhg.2018.04.012&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="29861105">Wang et al. (2018)</a> concluded that SPTBN4 mutations disrupt the cytoskeletal machinery that controls proper localization of ion channels and function of axonal domains mainly at the AIS and the nodes of Ranvier, resulting in severe neurologic dysfunction. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=29861105" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p>The autosomal recessive mouse mutation 'quivering' (qv), described by <a href="#6" class="mim-tip-reference" title="Yoon, C. H., Les, E. P. &lt;strong&gt;Quivering, a new first chromosome mutation in mice.&lt;/strong&gt; J. Hered. 48: 176-180, 1957."None>Yoon and Les (1957)</a>, produces progressive ataxia with hindlimb paralysis, deafness, and tremor. Ear twitch responses (Preyer reflex) to sound are absent in homozygous qv/qv mice, although cochlear morphology seems normal and cochlear potentials recorded at the round window are no different from those of control mice. However, responses from brainstem auditory nuclei show abnormal transmission of auditory inflammation, indicating that in contrast to the many mutations causing deafness originating in the cochlea, deafness in qv is central in origin (<a href="#2" class="mim-tip-reference" title="Deol, M. S., Frank, M. P., Steel, K. P., Bock, G. R. &lt;strong&gt;Genetic deafness of central origin.&lt;/strong&gt; Brain Res. 258: 177-179, 1983.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/24010186/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;24010186&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/0006-8993(83)91248-9&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="24010186">Deol et al., 1983</a>; <a href="#1" class="mim-tip-reference" title="Bock, G. R., Frank, M. P., Steel, K. P., Deol, M. S. &lt;strong&gt;The quivering mutant mouse: hereditary deafness of central origin.&lt;/strong&gt; Acta Otolaryng. 96: 371-377, 1983.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/6637453/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;6637453&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.3109/00016488309132722&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="6637453">Bock et al., 1983</a>). <a href="#4" class="mim-tip-reference" title="Parkinson, N. J., Olsson, C. L., Hallows, J. L., McKee-Johnson, J., Keogh, B. P., Noben-Trauth, K., Kujawa, S. G., Tempel, B. L. &lt;strong&gt;Mutant beta-spectrin 4 causes auditory and motor neuropathies in quivering mice.&lt;/strong&gt; Nature Genet. 29: 61-65, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11528393/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11528393&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng710&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11528393">Parkinson et al. (2001)</a> reported that qv mice carry loss-of-function mutations in the Sptnb4 gene that cause alterations in ion channel localization in myelinated nerves. They concluded that this finding provides a rationale for the auditory and motor neuropathies of these mice. <a href="#3" class="mim-tip-reference" title="Knierim, E., Gill, E., Seifert, F., Morales-Gonzalez, S., Unudurthi, S. D., Hund, T. J., Stenzel, W., Schuelke, M. &lt;strong&gt;A recessive mutation in beta-IV-spectrin (SPTBN4) associates with congenital myopathy, neuropathy, and central deafness.&lt;/strong&gt; Hum. Genet. 136: 903-910, 2017.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/28540413/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;28540413&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s00439-017-1814-7&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="28540413">Knierim et al. (2017)</a> found absence of Sptbn4 immunostaining at the sarcolemma of muscle from the qv mouse, as well as complete absence of type 1 muscle fibers. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=11528393+28540413+6637453+24010186" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<span id="mimReferencesToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<strong>REFERENCES</strong>
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<a id="Bock1983" class="mim-anchor"></a>
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Bock, G. R., Frank, M. P., Steel, K. P., Deol, M. S.
<strong>The quivering mutant mouse: hereditary deafness of central origin.</strong>
Acta Otolaryng. 96: 371-377, 1983.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/6637453/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">6637453</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=6637453" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.3109/00016488309132722" target="_blank">Full Text</a>]
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<a id="Deol1983" class="mim-anchor"></a>
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Deol, M. S., Frank, M. P., Steel, K. P., Bock, G. R.
<strong>Genetic deafness of central origin.</strong>
Brain Res. 258: 177-179, 1983.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/24010186/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">24010186</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=24010186" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/0006-8993(83)91248-9" target="_blank">Full Text</a>]
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<a id="Knierim2017" class="mim-anchor"></a>
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Knierim, E., Gill, E., Seifert, F., Morales-Gonzalez, S., Unudurthi, S. D., Hund, T. J., Stenzel, W., Schuelke, M.
<strong>A recessive mutation in beta-IV-spectrin (SPTBN4) associates with congenital myopathy, neuropathy, and central deafness.</strong>
Hum. Genet. 136: 903-910, 2017.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/28540413/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">28540413</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=28540413" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1007/s00439-017-1814-7" target="_blank">Full Text</a>]
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<a id="Parkinson2001" class="mim-anchor"></a>
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<p class="mim-text-font">
Parkinson, N. J., Olsson, C. L., Hallows, J. L., McKee-Johnson, J., Keogh, B. P., Noben-Trauth, K., Kujawa, S. G., Tempel, B. L.
<strong>Mutant beta-spectrin 4 causes auditory and motor neuropathies in quivering mice.</strong>
Nature Genet. 29: 61-65, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11528393/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11528393</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11528393" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1038/ng710" target="_blank">Full Text</a>]
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<a id="Wang2018" class="mim-anchor"></a>
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Wang, C.-C., Ortiz-Gonzalez, S. R., Yum, S. W., Gill, S. M., White, A., Kelter, E., Seaver, L. H., Lee, S., Wiley, G., Gaffney, P. M., Wierenga, K. J., Rasband, M. N.
<strong>Beta-IV spectrinopathies cause profound intellectual disability, congenital hypotonia, and motor axonal neuropathy.</strong>
Am. J. Hum. Genet. 102: 1158-1168, 2018.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/29861105/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">29861105</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=29861105" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/j.ajhg.2018.04.012" target="_blank">Full Text</a>]
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<a id="Yoon1957" class="mim-anchor"></a>
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<p class="mim-text-font">
Yoon, C. H., Les, E. P.
<strong>Quivering, a new first chromosome mutation in mice.</strong>
J. Hered. 48: 176-180, 1957.
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Contributors:
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Cassandra L. Kniffin - updated : 08/10/2018
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Cassandra L. Kniffin : 06/08/2017
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<a href="#mimCollapseEditHistory" role="button" data-toggle="collapse"> Edit History: </a>
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carol : 08/13/2018
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ckniffin : 08/10/2018<br>carol : 07/10/2017<br>carol : 06/09/2017<br>ckniffin : 06/08/2017
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<strong>#</strong> 617519
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NEURODEVELOPMENTAL DISORDER WITH HYPOTONIA, NEUROPATHY, AND DEAFNESS; NEDHND
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<em>Alternative titles; symbols</em>
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MYOPATHY, CONGENITAL, WITH NEUROPATHY AND DEAFNESS; CMND
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<strong>Phenotype-Gene Relationships</strong>
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Location
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Phenotype
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Phenotype <br /> MIM number
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Inheritance
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Phenotype <br /> mapping key
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Gene/Locus
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19q13.2
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Neurodevelopmental disorder with hypotonia, neuropathy, and deafness
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617519
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Autosomal recessive
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3
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SPTBN4
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606214
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because of evidence that neurodevelopmental disorder with hypotonia, neuropathy, and deafness (NEDHND) is caused by homozygous or compound heterozygous mutation in the SPTBN4 gene (606214) on chromosome 19q13.</p>
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<strong>Clinical Features</strong>
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<p>Knierim et al. (2017) reported a boy, born of consanguineous Kurdish parents, with NEDHND. He presented soon after birth with hypotonia, facial weakness, and areflexia. He had delayed motor development and feeding difficulties, and he never achieved head control. At age 10 years, he had myopathic facies, high-arched palate, severe distal muscle weakness, generalized muscle atrophy, scoliosis, ankle contractures, and severely delayed motor and mental development with inability to stand, sit, eat, or speak. Muscle biopsy showed type 1 fiber atrophy, but serum creatine kinase was normal. He also had central deafness with absent brainstem-evoked potentials and a combined axonal and demyelinating motor neuropathy. </p><p>Wang et al. (2018) reported 6 patients from 5 unrelated families with a severe neurodevelopmental disorder apparent from birth. The patients had congenital hypotonia, profound weakness with areflexia, respiratory and feeding difficulties, and profound developmental delay with no language development. They were unable to sit unsupported and were nonambulatory. Electrophysiologic studies in 3 patients showed a motor neuronopathy/axonopathy that was documented to be progressive in 1 patient. Muscle biopsy showed denervated and atrophic muscle, consistent with a neurogenic disease. Three patients had seizures, including 2 with severe intractable epilepsy. Additional features included cortical visual impairment and deafness due to auditory neuropathy. Wang et al. (2018) concluded that the muscle weakness in these patients was primarily due to severe motor axonal neuropathy and neuronopathy as opposed to a myopathy. </p>
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<strong>Inheritance</strong>
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<p>The transmission pattern of NEDHND in the family reported by Knierim et al. (2017) was consistent with autosomal recessive inheritance. </p>
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<strong>Molecular Genetics</strong>
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<p>In a boy, born of consanguineous Kurdish parents, with NEDHND, Knierim et al. (2017) identified a homozygous truncating mutation in the SPTBN4 gene (Q533X; 606214.0001). The mutation, which was found by a combination of autozygosity mapping and whole-exome sequencing, was confirmed by Sanger sequencing and segregated with the disorder in the family. Western blot analysis of patient fibroblasts showed absence of the SPTBN4 protein, and immunostaining of patient muscle sample showed absence of SPTBN4 at the sarcolemma. The phenotype was similar to that of the 'quivering' mouse, which results from a homozygous loss-of-function mutation in the Sptnb4 gene. </p><p>In 6 patients from 5 unrelated families with NEDHND, Wang et al. (2018) identified homozygous or compound heterozygous mutations in the SPTBN4 gene (see, e.g., 606214.0002-606214.0006). The mutations were found by exome sequencing; confirmed segregation of the mutations with the disorder was only possible in 1 family (family A). All patients except 1 (patient from family C) carried biallelic nonsense or frameshift mutations predicted to result in a complete loss of function. The patient from family C carried compound heterozygous missense mutations (R504Q, 606214.0004 and R2435C, 606214.0005). Five of the 7 variants were located N-terminal to SR10 and were predicted to affect only the longer sigma-1 splice variant; SR15 mediates the interaction with ankyrin-G (ANK3; 600465). The equivalent human variants in mouse Sptbn4 were expressed in cultured rat hippocampal neurons. Most of the truncating variants failed to localize to the axon initial segments (AIS) due to an inability to interact with ANK3, whereas the 2 missense variants and 1 C-terminal frameshift mutation (c.7453delG; 606214.0006) were able to interact with ANK3 and localized properly to the AIS. The c.7453delG mutant was abnormally present in small intracellular puncta rather than normal diffuse distribution, suggesting that the mutation disrupted the PH domain and altered the distribution of SPTBN4 in membrane compartments. The mutant protein was also unable to bind phosphoinositides, further demonstrating an adverse effect on PH domain function. Examination of the nodes of Ranvier was possible for 2 patients. Sural nerve biopsy from the patient with a homozygous truncating mutation (W903X; 606214.0003) that affected only the sigma-1 variant showed significantly reduced neurofascin labeling at the nodes of Ranvier as well as decreased immunostaining for certain sodium and potassium channels and nearly undetectable nodal immunoreactivity for the shorter SPTBN4 isoform (sigma-6). The findings indicated that sigma-6 is not sufficient to rescue nodal abnormalities. Sural nerve biopsy from the patient with compound heterozygous missense mutations showed fairly normal structure at the nodes of Ranvier, with a small reduction in potassium channels. Wang et al. (2018) concluded that SPTBN4 mutations disrupt the cytoskeletal machinery that controls proper localization of ion channels and function of axonal domains mainly at the AIS and the nodes of Ranvier, resulting in severe neurologic dysfunction. </p>
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<strong>Animal Model</strong>
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<p>The autosomal recessive mouse mutation 'quivering' (qv), described by Yoon and Les (1957), produces progressive ataxia with hindlimb paralysis, deafness, and tremor. Ear twitch responses (Preyer reflex) to sound are absent in homozygous qv/qv mice, although cochlear morphology seems normal and cochlear potentials recorded at the round window are no different from those of control mice. However, responses from brainstem auditory nuclei show abnormal transmission of auditory inflammation, indicating that in contrast to the many mutations causing deafness originating in the cochlea, deafness in qv is central in origin (Deol et al., 1983; Bock et al., 1983). Parkinson et al. (2001) reported that qv mice carry loss-of-function mutations in the Sptnb4 gene that cause alterations in ion channel localization in myelinated nerves. They concluded that this finding provides a rationale for the auditory and motor neuropathies of these mice. Knierim et al. (2017) found absence of Sptbn4 immunostaining at the sarcolemma of muscle from the qv mouse, as well as complete absence of type 1 muscle fibers. </p>
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<strong>REFERENCES</strong>
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<ol>
<li>
<p class="mim-text-font">
Bock, G. R., Frank, M. P., Steel, K. P., Deol, M. S.
<strong>The quivering mutant mouse: hereditary deafness of central origin.</strong>
Acta Otolaryng. 96: 371-377, 1983.
[PubMed: 6637453]
[Full Text: https://doi.org/10.3109/00016488309132722]
</p>
</li>
<li>
<p class="mim-text-font">
Deol, M. S., Frank, M. P., Steel, K. P., Bock, G. R.
<strong>Genetic deafness of central origin.</strong>
Brain Res. 258: 177-179, 1983.
[PubMed: 24010186]
[Full Text: https://doi.org/10.1016/0006-8993(83)91248-9]
</p>
</li>
<li>
<p class="mim-text-font">
Knierim, E., Gill, E., Seifert, F., Morales-Gonzalez, S., Unudurthi, S. D., Hund, T. J., Stenzel, W., Schuelke, M.
<strong>A recessive mutation in beta-IV-spectrin (SPTBN4) associates with congenital myopathy, neuropathy, and central deafness.</strong>
Hum. Genet. 136: 903-910, 2017.
[PubMed: 28540413]
[Full Text: https://doi.org/10.1007/s00439-017-1814-7]
</p>
</li>
<li>
<p class="mim-text-font">
Parkinson, N. J., Olsson, C. L., Hallows, J. L., McKee-Johnson, J., Keogh, B. P., Noben-Trauth, K., Kujawa, S. G., Tempel, B. L.
<strong>Mutant beta-spectrin 4 causes auditory and motor neuropathies in quivering mice.</strong>
Nature Genet. 29: 61-65, 2001.
[PubMed: 11528393]
[Full Text: https://doi.org/10.1038/ng710]
</p>
</li>
<li>
<p class="mim-text-font">
Wang, C.-C., Ortiz-Gonzalez, S. R., Yum, S. W., Gill, S. M., White, A., Kelter, E., Seaver, L. H., Lee, S., Wiley, G., Gaffney, P. M., Wierenga, K. J., Rasband, M. N.
<strong>Beta-IV spectrinopathies cause profound intellectual disability, congenital hypotonia, and motor axonal neuropathy.</strong>
Am. J. Hum. Genet. 102: 1158-1168, 2018.
[PubMed: 29861105]
[Full Text: https://doi.org/10.1016/j.ajhg.2018.04.012]
</p>
</li>
<li>
<p class="mim-text-font">
Yoon, C. H., Les, E. P.
<strong>Quivering, a new first chromosome mutation in mice.</strong>
J. Hered. 48: 176-180, 1957.
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Cassandra L. Kniffin - updated : 08/10/2018
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carol : 08/13/2018<br>ckniffin : 08/10/2018<br>carol : 07/10/2017<br>carol : 06/09/2017<br>ckniffin : 06/08/2017
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