nih-gov/www.ncbi.nlm.nih.gov/omim/619599

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<title>
Entry
- #619599 - EPIDERMOLYSIS BULLOSA SIMPLEX 2D, GENERALIZED, INTERMEDIATE OR SEVERE, AUTOSOMAL RECESSIVE; EBS2D
- OMIM
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<span class="h4">#619599</span>
<br />
<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/619599"><strong>Clinical Synopsis</strong></a>
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<a href="/phenotypicSeries/PS131760"> <strong>Phenotypic Series</strong> </a>
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<a href="#description">Description</a>
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<a href="#clinicalFeatures">Clinical Features</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#inheritance">Inheritance</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#molecularGenetics">Molecular Genetics</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=EPIDERMOLYSIS BULLOSA SIMPLEX 2D, GENERALIZED, INTERMEDIATE OR SEVERE, AUTOSOMAL RECESSIVE" 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.orpha.net/consor/cgi-bin/ClinicalLabs_Search_Simple.php?lng=EN&LnkId=11903&Typ=Pat" class="mim-tip-hint" title="A list of European laboratories that offer genetic testing." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'EuroGentest', 'domain': 'orpha.net'})">EuroGentest</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/books/NBK1369/" 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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<strong>ORPHA:</strong> 89838<br />
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619599
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EPIDERMOLYSIS BULLOSA SIMPLEX 2D, GENERALIZED, INTERMEDIATE OR SEVERE, AUTOSOMAL RECESSIVE; EBS2D
</span>
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<th>
Location
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<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/12/410?start=-3&limit=10&highlight=410">
12q13.13
</a>
</span>
</td>
<td>
<span class="mim-font">
Epidermolysis bullosa simplex 2D, generalized, intermediate or severe, autosomal recessive
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619599"> 619599 </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">
KRT5
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> 148040 </a>
</span>
</td>
</tr>
</tbody>
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<span class="glyphicon glyphicon-question-sign mim-tip-hint" title="OMIM PheneGene graphics depict relationships between phenotypes, groups of related phenotypes (Phenotypic Series), and genes.<br /><a href='/static/omim/pdf/OMIM_Graphics.pdf' target='_blank'>A quick reference overview and guide (PDF)</a>"></span>
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<div class="small" style="margin: 5px">
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<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>
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<div>
<span class="h5 mim-font">
<strong> GROWTH </strong>
</span>
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<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Other </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Growth retardation <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/59576002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">59576002</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/444896005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">444896005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0151686&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0151686</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001510" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001510</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001510" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001510</a>]</span><br />
</span>
</div>
</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> Mouth </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Intraoral blistering <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5678173&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5678173</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Teeth </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Delayed eruption of primary dentition <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5678251&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5678251</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> RESPIRATORY </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Nasopharynx </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Recurrent upper respiratory infections <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/195708003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">195708003</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0581381&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0581381</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002788" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002788</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002788" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002788</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> SKIN, NAILS, & HAIR </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Skin </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Generalized blistering of skin from birth <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5678252&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5678252</a>]</span><br /> -
Thin or atrophic skin <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5678253&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5678253</a>]</span><br /> -
Bullae heal without scarring <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5678254&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5678254</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Electron Microscopy </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Disorganization of cytoplasmic contents of basal keratinocytes <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5678255&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5678255</a>]</span><br /> -
Sparse tonofilaments in basal keratinocytes <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5678256&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5678256</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> NEUROLOGIC </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Central Nervous System </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Developmental delay, mild <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1848735&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1848735</a>]</span> <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/248290002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">248290002</a>, <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">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/315.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">315.9</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 />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MISCELLANEOUS </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Based on report of 3 unrelated patients (last curated January 2022)<br /> -
Death may occur in neonatal period <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/419620001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">419620001</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1306577&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1306577</a>, <a href="https://bioportal.bioontology.org/search?q=C0011065&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0011065</a>, <a href="https://bioportal.bioontology.org/search?q=C1546949&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1546949</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MOLECULAR BASIS </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Caused by mutation in the keratin-5 gene (KRT5, <a href="/entry/148040#0022">148040.0022</a>)<br />
</span>
</div>
</div>
</div>
<div class="text-right">
<a href="#mimClinicalSynopsisFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
</div>
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<div class="small">
<div class="row">
<div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
<h5>
Epidermolysis bullosa simplex
- <a href="/phenotypicSeries/PS131760">PS131760</a>
- 18 Entries
</h5>
</div>
</div>
<div class="row" style="margin-left: 0.125em; margin-right: 0.125em;">
<table class="table table-bordered table-condensed table-hover mim-table-padding">
<thead>
<tr>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Location</strong>
</th>
<th class="col-lg-5 col-md-5 col-sm-5 col-xs-6 text-nowrap">
<strong>Phenotype</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Inheritance</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Phenotype<br />mapping key</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Phenotype<br />MIM number</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Gene/Locus</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Gene/Locus<br />MIM number</strong>
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/900?start=-3&limit=10&highlight=900"> 3q27.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617294"> Epidermolysis bullosa simplex 6, generalized intermediate, with or without cardiomyopathy </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617294"> 617294 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611295"> KLHL24 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611295"> 611295 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/611?start=-3&limit=10&highlight=611"> 6p12.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615425"> Epidermolysis bullosa simplex 3, localized or generalized intermediate, with bp230 deficiency </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615425"> 615425 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/113810"> DST </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/113810"> 113810 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/621?start=-3&limit=10&highlight=621"> 8q24.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612138"> Epidermolysis bullosa simplex 5C, with pyloric atresia </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612138"> 612138 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601282"> PLEC1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601282"> 601282 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/621?start=-3&limit=10&highlight=621"> 8q24.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/226670"> Epidermolysis bullosa simplex 5B, with muscular dystrophy </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/226670"> 226670 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601282"> PLEC1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601282"> 601282 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/621?start=-3&limit=10&highlight=621"> 8q24.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616487"> ?Epidermolysis bullosa simplex 5D, generalized intermediate, autosomal recessive </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616487"> 616487 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601282"> PLEC1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601282"> 601282 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/621?start=-3&limit=10&highlight=621"> 8q24.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131950"> Epidermolysis bullosa simplex 5A, Ogna type </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131950"> 131950 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601282"> PLEC1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601282"> 601282 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/48?start=-3&limit=10&highlight=48"> 11p15.5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609057"> Epidermolysis bullosa simplex 7, with nephropathy and deafness </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609057"> 609057 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602243"> CD151 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602243"> 602243 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/899?start=-3&limit=10&highlight=899"> 11q22.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615028"> Epidermolysis bullosa simplex 4, localized or generalized intermediate, autosomal recessive </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615028"> 615028 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612878"> EXPH5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612878"> 612878 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/410?start=-3&limit=10&highlight=410"> 12q13.13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619594"> Epidermolysis bullosa simplex 2C, localized </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619594"> 619594 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> KRT5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> 148040 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/410?start=-3&limit=10&highlight=410"> 12q13.13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609352"> Epidermolysis bullosa simplex 2E, with migratory circinate erythema </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609352"> 609352 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> KRT5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> 148040 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/410?start=-3&limit=10&highlight=410"> 12q13.13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619588"> Epidermolysis bullosa simplex 2B, generalized intermediate </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619588"> 619588 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> KRT5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> 148040 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/410?start=-3&limit=10&highlight=410"> 12q13.13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131960"> Epidermolysis bullosa simplex 2F, with mottled pigmentation </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131960"> 131960 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> KRT5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> 148040 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/410?start=-3&limit=10&highlight=410"> 12q13.13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619555"> Epidermolysis bullosa simplex 2A, generalized severe </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619555"> 619555 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> KRT5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> 148040 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/410?start=-3&limit=10&highlight=410"> 12q13.13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619599"> Epidermolysis bullosa simplex 2D, generalized, intermediate or severe, autosomal recessive </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619599"> 619599 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> KRT5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> 148040 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/549?start=-3&limit=10&highlight=549"> 17q21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601001"> Epidermolysis bullosa simplex 1D, generalized, intermediate or severe, autosomal recessive </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601001"> 601001 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148066"> KRT14 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148066"> 148066 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/549?start=-3&limit=10&highlight=549"> 17q21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131900"> Epidermolysis bullosa simplex 1B, generalized intermediate </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131900"> 131900 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148066"> KRT14 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148066"> 148066 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/549?start=-3&limit=10&highlight=549"> 17q21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131800"> Epidermolysis bullosa simplex 1C, localized </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131800"> 131800 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148066"> KRT14 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148066"> 148066 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/549?start=-3&limit=10&highlight=549"> 17q21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131760"> Epidermolysis bullosa simplex 1A, generalized severe </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131760"> 131760 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148066"> KRT14 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148066"> 148066 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
<div class="text-right small">
<a href="#mimPhenotypicSeriesFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
</div>
</div>
</div>
</div>
<div>
<br />
</div>
<div>
<a id="text" class="mim-anchor"></a>
<h4 href="#mimTextFold" id="mimTextToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimTextToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<span class="mim-tip-floating" qtip_title="<strong>Looking For More References?</strong>" qtip_text="Click the 'reference plus' icon &lt;span class='glyphicon glyphicon-plus-sign'&gt;&lt;/span&gt at the end of each OMIM text paragraph to see more references related to the content of the preceding paragraph.">
<strong>TEXT</strong>
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</h4>
<div id="mimTextFold" class="collapse in ">
<span class="mim-text-font">
<p>A number sign (#) is used with this entry because autosomal recessive generalized intermediate or severe epidermolysis bullosa simplex 2D (EBS2D) is caused by homozygous mutation in the KRT5 gene (<a href="/entry/148040">148040</a>) on chromosome 12q13.</p>
</span>
<div>
<br />
</div>
</div>
<div>
<a id="description" class="mim-anchor"></a>
<h4 href="#mimDescriptionFold" id="mimDescriptionToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimDescriptionToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Description</strong>
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</h4>
</div>
<div id="mimDescriptionFold" class="collapse in ">
<span class="mim-text-font">
<p>Autosomal recessive generalized intermediate or severe epidermolysis bullosa simplex 2D (EBS2D) is characterized by widespread intraepidermal skin blistering and erosions from birth (summary by <a href="#2" class="mim-tip-reference" title="Vahidnezhad, H., Youssefian, L., Daneshpazhooh, M., Mahmoudi, H., Kariminejad, A., Fischer, J., Christiansen, J., Schneider, H., Guy, A., Liu, L., McGrath, J. A., Has, C., Uitto, J. &lt;strong&gt;Biallelic KRT5 mutations in autosomal recessive epidermolysis bullosa simplex, including a complete human keratin 5 &#x27;knock-out&#x27;.&lt;/strong&gt; Matrix Biol. 83: 48-59, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/31302245/&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;31302245&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.matbio.2019.07.002&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="31302245">Vahidnezhad et al., 2019</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=31302245" 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>For a discussion of genetic heterogeneity of the subtypes of EBS, see EBS1A (<a href="/entry/131760">131760</a>).</p>
</span>
<div>
<br />
</div>
</div>
<div>
<a id="clinicalFeatures" class="mim-anchor"></a>
<h4 href="#mimClinicalFeaturesFold" id="mimClinicalFeaturesToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimClinicalFeaturesToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Clinical Features</strong>
</span>
</h4>
</div>
<div id="mimClinicalFeaturesFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p><a href="#1" class="mim-tip-reference" title="Tryon, R. K., Tolar, J., Preusser, S. M., Riddle, M. J., Keene, D. R., Bower, M., Thyagarajan, B., Ebens, C. L. &lt;strong&gt;A homozygous frameshift variant in the KRT5 gene is compatible with life and results in severe recessive epidermolysis bullosa simplex.&lt;/strong&gt; JAAD Case Rep. 5: 576-579, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/31312705/&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;31312705&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=31312705[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.jdcr.2019.03.025&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="31312705">Tryon et al. (2019)</a> studied a 2-year-old boy from a consanguineous Middle Eastern family who presented at birth with blistering and sloughing of his 'nearly transparent' skin. At the time of evaluation, 90% of his body surface area was affected by blisters, crusts, erosions, and hyperpigmentation. Oral blistering and lesions were common, and teeth were slow to erupt. Fingernails were intact, but pseudosyndactyly had developed on hands and feet. He reportedly experienced recurrent upper respiratory tract infections. He had some extracutaneous features including developmental delays, hearing loss, pectus carinatum, and growth retardation. He died at age 26 months of age of septic shock. The parents and older brother were unaffected. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=31312705" 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="#2" class="mim-tip-reference" title="Vahidnezhad, H., Youssefian, L., Daneshpazhooh, M., Mahmoudi, H., Kariminejad, A., Fischer, J., Christiansen, J., Schneider, H., Guy, A., Liu, L., McGrath, J. A., Has, C., Uitto, J. &lt;strong&gt;Biallelic KRT5 mutations in autosomal recessive epidermolysis bullosa simplex, including a complete human keratin 5 &#x27;knock-out&#x27;.&lt;/strong&gt; Matrix Biol. 83: 48-59, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/31302245/&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;31302245&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.matbio.2019.07.002&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="31302245">Vahidnezhad et al. (2019)</a> described 2 patients with EBS and homozygous mutations in the KRT5 gene. Patient 2 was a 4-year-old boy born of first-cousin Syrian parents who had generalized skin blistering from birth with occasional involvement of oral mucous membranes. Bullae were observed mainly on the soles and abdomen and healed without scarring. The parents and older brother were unaffected. Patient 3 was a girl born of first-cousin Syrian parents who at birth had extensive skin defects and multiple blisters on feet, legs, hands, and right arm. Her leg and feet were underdeveloped, and skin was atrophic. A few hours after birth more blisters developed on her trunk, face, and mouth, and eventually about 80% of the body was affected. She died at 4 weeks of age. The mother's sister had been born with similar skin manifestations and died shortly after birth. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=31302245" 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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<br />
</div>
</div>
<div>
<a id="inheritance" class="mim-anchor"></a>
<h4 href="#mimInheritanceFold" id="mimInheritanceToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimInheritanceToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Inheritance</strong>
</span>
</h4>
</div>
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<p>The transmission pattern of EBS2D in the families reported by <a href="#1" class="mim-tip-reference" title="Tryon, R. K., Tolar, J., Preusser, S. M., Riddle, M. J., Keene, D. R., Bower, M., Thyagarajan, B., Ebens, C. L. &lt;strong&gt;A homozygous frameshift variant in the KRT5 gene is compatible with life and results in severe recessive epidermolysis bullosa simplex.&lt;/strong&gt; JAAD Case Rep. 5: 576-579, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/31312705/&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;31312705&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=31312705[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.jdcr.2019.03.025&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="31312705">Tryon et al. (2019)</a> and <a href="#2" class="mim-tip-reference" title="Vahidnezhad, H., Youssefian, L., Daneshpazhooh, M., Mahmoudi, H., Kariminejad, A., Fischer, J., Christiansen, J., Schneider, H., Guy, A., Liu, L., McGrath, J. A., Has, C., Uitto, J. &lt;strong&gt;Biallelic KRT5 mutations in autosomal recessive epidermolysis bullosa simplex, including a complete human keratin 5 &#x27;knock-out&#x27;.&lt;/strong&gt; Matrix Biol. 83: 48-59, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/31302245/&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;31302245&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.matbio.2019.07.002&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="31302245">Vahidnezhad et al. (2019)</a> was consistent with autosomal recessive inheritance. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=31312705+31302245" 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>In a 2-year-old boy with severe EBS, <a href="#1" class="mim-tip-reference" title="Tryon, R. K., Tolar, J., Preusser, S. M., Riddle, M. J., Keene, D. R., Bower, M., Thyagarajan, B., Ebens, C. L. &lt;strong&gt;A homozygous frameshift variant in the KRT5 gene is compatible with life and results in severe recessive epidermolysis bullosa simplex.&lt;/strong&gt; JAAD Case Rep. 5: 576-579, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/31312705/&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;31312705&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=31312705[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.jdcr.2019.03.025&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="31312705">Tryon et al. (2019)</a> detected homozygosity for a 1-bp deletion in the KRT5 gene (<a href="/entry/148040#0022">148040.0022</a>) that resulted in premature truncation of the protein in the 1B domain. The unaffected parents and brother were heterozygous for the mutation. Immunofluorescence staining of a full-thickness skin biopsy from the patient showed normal staining for collagens VII (see <a href="/entry/120120">120120</a>) and XVII (<a href="/entry/113811">113811</a>) and laminins A3 (<a href="/entry/600805">600805</a>), B3 (<a href="/entry/150310">150310</a>), and C2 (<a href="/entry/150292">150292</a>). However, the epidermis was thin, with discontinuous sparse staining for keratin-5 and -14 (<a href="/entry/148066">148066</a>). Immunoelectron microscopy showed disorganization of cytoplasmic contents of basal keratinocytes and mostly absent intermediate filaments. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=31312705" 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 2 patients from consanguineous families with autosomal recessive generalized EBS, <a href="#2" class="mim-tip-reference" title="Vahidnezhad, H., Youssefian, L., Daneshpazhooh, M., Mahmoudi, H., Kariminejad, A., Fischer, J., Christiansen, J., Schneider, H., Guy, A., Liu, L., McGrath, J. A., Has, C., Uitto, J. &lt;strong&gt;Biallelic KRT5 mutations in autosomal recessive epidermolysis bullosa simplex, including a complete human keratin 5 &#x27;knock-out&#x27;.&lt;/strong&gt; Matrix Biol. 83: 48-59, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/31302245/&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;31302245&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.matbio.2019.07.002&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="31302245">Vahidnezhad et al. (2019)</a> identified mutations in the KTY5 gene. Patient 2 was homozygous for a c.472G-A transition that resulted in an asp158-to-asn substitution (D158N; <a href="/entry/148040#0023">148040.0023</a>). Patient 3 was homozygous for a c.1440-1G-A transition at the acceptor splice site of intron 7 (<a href="/entry/148040#0024">148040.0024</a>). Immunofluorescence staining of patient skin showed complete absence of keratin-5. The unaffected parents of each patient were heterozygous for the respective mutations. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=31302245" 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="1" class="mim-anchor"></a>
<a id="Tryon2019" class="mim-anchor"></a>
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Tryon, R. K., Tolar, J., Preusser, S. M., Riddle, M. J., Keene, D. R., Bower, M., Thyagarajan, B., Ebens, C. L.
<strong>A homozygous frameshift variant in the KRT5 gene is compatible with life and results in severe recessive epidermolysis bullosa simplex.</strong>
JAAD Case Rep. 5: 576-579, 2019.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/31312705/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">31312705</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=31312705[PMID]&report=imagesdocsum" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Image', 'domain': 'ncbi.nlm.nih.gov'})">images</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=31312705" 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.jdcr.2019.03.025" target="_blank">Full Text</a>]
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<a id="Vahidnezhad2019" class="mim-anchor"></a>
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Vahidnezhad, H., Youssefian, L., Daneshpazhooh, M., Mahmoudi, H., Kariminejad, A., Fischer, J., Christiansen, J., Schneider, H., Guy, A., Liu, L., McGrath, J. A., Has, C., Uitto, J.
<strong>Biallelic KRT5 mutations in autosomal recessive epidermolysis bullosa simplex, including a complete human keratin 5 'knock-out'.</strong>
Matrix Biol. 83: 48-59, 2019.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/31302245/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">31302245</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=31302245" 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.matbio.2019.07.002" target="_blank">Full Text</a>]
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Anne M. Stumpf : 10/28/2021
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alopez : 11/01/2021
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<strong>#</strong> 619599
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<span class="mim-font">
EPIDERMOLYSIS BULLOSA SIMPLEX 2D, GENERALIZED, INTERMEDIATE OR SEVERE, AUTOSOMAL RECESSIVE; EBS2D
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<strong>ORPHA:</strong> 89838; &nbsp;
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<strong>Phenotype-Gene Relationships</strong>
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Location
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Phenotype
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Phenotype <br /> MIM number
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Inheritance
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Phenotype <br /> mapping key
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Gene/Locus
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Gene/Locus <br /> MIM number
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12q13.13
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Epidermolysis bullosa simplex 2D, generalized, intermediate or severe, autosomal recessive
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619599
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Autosomal recessive
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3
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KRT5
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148040
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because autosomal recessive generalized intermediate or severe epidermolysis bullosa simplex 2D (EBS2D) is caused by homozygous mutation in the KRT5 gene (148040) on chromosome 12q13.</p>
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<strong>Description</strong>
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<p>Autosomal recessive generalized intermediate or severe epidermolysis bullosa simplex 2D (EBS2D) is characterized by widespread intraepidermal skin blistering and erosions from birth (summary by Vahidnezhad et al., 2019). </p><p>For a discussion of genetic heterogeneity of the subtypes of EBS, see EBS1A (131760).</p>
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<strong>Clinical Features</strong>
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<p>Tryon et al. (2019) studied a 2-year-old boy from a consanguineous Middle Eastern family who presented at birth with blistering and sloughing of his 'nearly transparent' skin. At the time of evaluation, 90% of his body surface area was affected by blisters, crusts, erosions, and hyperpigmentation. Oral blistering and lesions were common, and teeth were slow to erupt. Fingernails were intact, but pseudosyndactyly had developed on hands and feet. He reportedly experienced recurrent upper respiratory tract infections. He had some extracutaneous features including developmental delays, hearing loss, pectus carinatum, and growth retardation. He died at age 26 months of age of septic shock. The parents and older brother were unaffected. </p><p>Vahidnezhad et al. (2019) described 2 patients with EBS and homozygous mutations in the KRT5 gene. Patient 2 was a 4-year-old boy born of first-cousin Syrian parents who had generalized skin blistering from birth with occasional involvement of oral mucous membranes. Bullae were observed mainly on the soles and abdomen and healed without scarring. The parents and older brother were unaffected. Patient 3 was a girl born of first-cousin Syrian parents who at birth had extensive skin defects and multiple blisters on feet, legs, hands, and right arm. Her leg and feet were underdeveloped, and skin was atrophic. A few hours after birth more blisters developed on her trunk, face, and mouth, and eventually about 80% of the body was affected. She died at 4 weeks of age. The mother's sister had been born with similar skin manifestations and died shortly after birth. </p>
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<strong>Inheritance</strong>
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<p>The transmission pattern of EBS2D in the families reported by Tryon et al. (2019) and Vahidnezhad et al. (2019) was consistent with autosomal recessive inheritance. </p>
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<strong>Molecular Genetics</strong>
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<p>In a 2-year-old boy with severe EBS, Tryon et al. (2019) detected homozygosity for a 1-bp deletion in the KRT5 gene (148040.0022) that resulted in premature truncation of the protein in the 1B domain. The unaffected parents and brother were heterozygous for the mutation. Immunofluorescence staining of a full-thickness skin biopsy from the patient showed normal staining for collagens VII (see 120120) and XVII (113811) and laminins A3 (600805), B3 (150310), and C2 (150292). However, the epidermis was thin, with discontinuous sparse staining for keratin-5 and -14 (148066). Immunoelectron microscopy showed disorganization of cytoplasmic contents of basal keratinocytes and mostly absent intermediate filaments. </p><p>In 2 patients from consanguineous families with autosomal recessive generalized EBS, Vahidnezhad et al. (2019) identified mutations in the KTY5 gene. Patient 2 was homozygous for a c.472G-A transition that resulted in an asp158-to-asn substitution (D158N; 148040.0023). Patient 3 was homozygous for a c.1440-1G-A transition at the acceptor splice site of intron 7 (148040.0024). Immunofluorescence staining of patient skin showed complete absence of keratin-5. The unaffected parents of each patient were heterozygous for the respective mutations. </p>
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<strong>REFERENCES</strong>
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</h4>
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<p />
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<ol>
<li>
<p class="mim-text-font">
Tryon, R. K., Tolar, J., Preusser, S. M., Riddle, M. J., Keene, D. R., Bower, M., Thyagarajan, B., Ebens, C. L.
<strong>A homozygous frameshift variant in the KRT5 gene is compatible with life and results in severe recessive epidermolysis bullosa simplex.</strong>
JAAD Case Rep. 5: 576-579, 2019.
[PubMed: 31312705]
[Full Text: https://doi.org/10.1016/j.jdcr.2019.03.025]
</p>
</li>
<li>
<p class="mim-text-font">
Vahidnezhad, H., Youssefian, L., Daneshpazhooh, M., Mahmoudi, H., Kariminejad, A., Fischer, J., Christiansen, J., Schneider, H., Guy, A., Liu, L., McGrath, J. A., Has, C., Uitto, J.
<strong>Biallelic KRT5 mutations in autosomal recessive epidermolysis bullosa simplex, including a complete human keratin 5 &#x27;knock-out&#x27;.</strong>
Matrix Biol. 83: 48-59, 2019.
[PubMed: 31302245]
[Full Text: https://doi.org/10.1016/j.matbio.2019.07.002]
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Anne M. Stumpf : 10/28/2021
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alopez : 11/01/2021<br>alopez : 10/28/2021
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