nih-gov/www.ncbi.nlm.nih.gov/omim/619588

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<title>
Entry
- #619588 - EPIDERMOLYSIS BULLOSA SIMPLEX 2B, GENERALIZED INTERMEDIATE; EBS2B
- OMIM
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<span class="h4">#619588</span>
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<strong>Table of Contents</strong>
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<li role="presentation">
<a href="#title"><strong>Title</strong></a>
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<a href="#phenotypeMap"><strong>Phenotype-Gene Relationships</strong></a>
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<li role="presentation">
<a href="/clinicalSynopsis/619588"><strong>Clinical Synopsis</strong></a>
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<a href="/phenotypicSeries/PS131760"> <strong>Phenotypic Series</strong> </a>
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<a href="#text"><strong>Text</strong></a>
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<li role="presentation" style="margin-left: 1em">
<a href="#description">Description</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#clinicalFeatures">Clinical Features</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#mapping">Mapping</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#inheritance">Inheritance</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#molecularGenetics">Molecular Genetics</a>
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<li role="presentation">
<a href="#references"><strong>References</strong></a>
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<li role="presentation">
<a href="#creationDate"><strong>Creation Date</strong></a>
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<div style="display: table-cell;">Clinical Resources</div>
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<div><a href="https://clinicaltrials.gov/search?cond=(EPIDERMOLYSIS BULLOSA SIMPLEX 2B, GENERALIZED INTERMEDIATE) OR (KRT5)" class="mim-tip-hint" title="Clinical Trials" 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/gtr/all/tests/?term=619588[mim]" class="mim-tip-hint" title="Genetic Testing Registry." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'GTR', 'domain': 'ncbi.nlm.nih.gov'})">GTR</a></div>
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<span class="mim-tip-bottom" qtip_title="<strong>Looking for this gene or this phenotype in other resources?</strong>" qtip_text="Select a related resource from the dropdown menu and click for a targeted link to information directly relevant.">
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&nbsp;
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<span class="h3">
<span class="mim-font mim-tip-hint" title="Phenotype description, molecular basis known">
<span class="text-danger"><strong>#</strong></span>
619588
</span>
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<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
EPIDERMOLYSIS BULLOSA SIMPLEX 2B, GENERALIZED INTERMEDIATE; EBS2B
</span>
</h3>
</div>
<div>
<br />
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<a id="alternativeTitles" class="mim-anchor"></a>
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<p>
<span class="mim-font">
<em>Alternative titles; symbols</em>
</span>
</p>
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<h4>
<span class="mim-font">
EPIDERMOLYSIS BULLOSA SIMPLEX 2B, KOEBNER TYPE
</span>
</h4>
</div>
</div>
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<br />
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<a id="phenotypeMap" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>Phenotype-Gene Relationships</strong>
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<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/12/410?start=-3&limit=10&highlight=410">
12q13.13
</a>
</span>
</td>
<td>
<span class="mim-font">
Epidermolysis bullosa simplex 2B, generalized intermediate
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619588"> 619588 </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">
KRT5
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/148040"> 148040 </a>
</span>
</td>
</tr>
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<li><a href="/graph/linear/619588" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/619588" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Radial'})"> Radial </a></li>
</ul>
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<span class="glyphicon glyphicon-question-sign mim-tip-hint" title="OMIM PheneGene graphics depict relationships between phenotypes, groups of related phenotypes (Phenotypic Series), and genes.<br /><a href='/static/omim/pdf/OMIM_Graphics.pdf' target='_blank'>A quick reference overview and guide (PDF)</a>"></span>
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<div id="mimClinicalSynopsisFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small" style="margin: 5px">
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<span class="h5 mim-font">
<strong> INHERITANCE </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Autosomal dominant <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/263681008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">263681008</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/771269000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">771269000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0443147&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0443147</a>, <a href="https://bioportal.bioontology.org/search?q=C1867440&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1867440</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000006</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000006</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> Mouth </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Oral mucosal blisters <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0853945&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0853945</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0200097" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0200097</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0200097" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0200097</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 bullae, solitary and grouped <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5563508&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5563508</a>]</span><br /> -
Serous and hemorrhagic blisters <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5563509&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5563509</a>]</span><br /> -
Palmoplantar hyperkeratosis <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/L85.2" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">L85.2</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0022596&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0022596</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000972" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000972</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000972" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000972</a>]</span><br /> -
Mild hyperpigmentation after healing <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5563510&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5563510</a>]</span><br /> -
Lack of scarring <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C2751130&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2751130</a>]</span><br /> -
Few to no milia <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5563511&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5563511</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">
- Intraepidermal blistering <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0878564&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0878564</a>]</span><br /> -
Cytolysis of basal keratinocytes <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5563512&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5563512</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MISCELLANEOUS </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Onset at birth or in early infancy<br /> -
Generalized blistering early in life<br /> -
Predominantly affecting palms and soles later in life<br /> -
Disease exacerbation during summer or with febrile episodes<br /> -
Improvement with age<br /> -
Intrafamilial variable expressivity<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#0002">148040.0002</a>)<br />
</span>
</div>
</div>
</div>
<div class="text-right">
<a href="#mimClinicalSynopsisFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
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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/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/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>
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<span class="mim-font">
<a href="/entry/148040"> 148040 </a>
</span>
</td>
</tr>
<tr>
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<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>
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<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/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>
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</div>
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<div>
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<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>
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<p>A number sign (#) is used with this entry because of evidence that generalized intermediate epidermolysis bullosa simplex-2B (EBS2B) is caused by heterozygous mutation in the KRT5 gene (<a href="/entry/148040">148040</a>) on chromosome 12q13.</p><p>Another form of generalized intermediate EBS, EBS1B (<a href="/entry/131900">131900</a>), is caused by mutation in the KRT14 gene (<a href="/entry/148066">148066</a>).</p>
</span>
<div>
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</div>
</div>
<div>
<a id="description" class="mim-anchor"></a>
<h4 href="#mimDescriptionFold" id="mimDescriptionToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
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<strong>Description</strong>
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<p>Generalized intermediate epidermolysis bullosa simplex-2B (EBS2B) is an autosomal dominant disorder of skin in which intraepidermal blistering occurs after minor mechanical trauma. Skin blistering is generalized, begins at birth, and is worsened by heat, humidity, and sweating. The tendency to blistering diminishes in adolescence, when it may become localized to hands and feet. Intermediate EBS has previously been known as the Koebner type (summary by <a href="#5" class="mim-tip-reference" title="Has, C., Bauer, J. W., Bodemer, C., Bolling, M. C., Bruckner-Tuderman, L., Diem, A., Fine, J. D., Heagerty, A., Hovnanian, A., Marinkovich, M. P., Martinez, A. E., McGrath, J. A., and 10 others. &lt;strong&gt;Consensus reclassification of inherited epidermolysis bullosa and other disorders with skin fragility.&lt;/strong&gt; Brit. J. Derm. 183: 614-627, 2020.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/32017015/&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;32017015&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1111/bjd.18921&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="32017015">Has et al., 2020</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=32017015" 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><p><strong><em>Reviews</em></strong></p><p>
<a href="#5" class="mim-tip-reference" title="Has, C., Bauer, J. W., Bodemer, C., Bolling, M. C., Bruckner-Tuderman, L., Diem, A., Fine, J. D., Heagerty, A., Hovnanian, A., Marinkovich, M. P., Martinez, A. E., McGrath, J. A., and 10 others. &lt;strong&gt;Consensus reclassification of inherited epidermolysis bullosa and other disorders with skin fragility.&lt;/strong&gt; Brit. J. Derm. 183: 614-627, 2020.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/32017015/&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;32017015&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1111/bjd.18921&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="32017015">Has et al. (2020)</a> reviewed characteristic features and molecular bases of the subtypes of epidermolysis bullosa, and provided a consensus reclassification of disorders with skin fragility. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=32017015" 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>
</span>
<div>
<br />
</div>
</div>
<div>
<a id="clinicalFeatures" class="mim-anchor"></a>
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<strong>Clinical Features</strong>
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</h4>
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<p><a href="#4" class="mim-tip-reference" title="Hacham-Zadeh, S., Rappersberger, K., Livshin, R., Konrad, K. &lt;strong&gt;Epidermolysis bullosa herpetiformis Dowling-Meara in a large family.&lt;/strong&gt; J. Am. Acad. Derm. 18: 702-706, 1988.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/3372762/&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;3372762&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0190-9622(88)70093-6&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="3372762">Hacham-Zadeh et al. (1988)</a> described a large Arab family originating from Jerusalem in which 38 affected individuals spanning 4 generations had EBS. Onset occurred between birth and 2 weeks of age. The main clinical features were bullae, generalized, solitary, and in groups, with predilection to the skin of the palms and soles. Mild to moderate patchy hyperkeratosis of the palms and soles was found in 5 affected members of the family. Blisters in oral mucous membranes were noted and found in summer and in periods of fever. Hair, teeth, and nails were normal. Improvement was noted by progression of age from 5 to 23 years, and by some in summer and by others in winter. Ultrastructural studies from a fresh blister disclosed intraepidermal blister via cytolysis of basal cell cytoplasm. The pedigree indicated transmission of an autosomal dominant gene. However, in 1 instance, affected first cousins were married and all 6 of their offspring were affected. There was marked intrafamilial variability. Although the family was originally thought to have the Dowling-Meara form of EBS, <a href="#10" class="mim-tip-reference" title="Stephens, K., Zlotogorski, A., Smith, L., Ehrlich, P., Wijsman, E., Livingston, R. J., Sybert, V. P. &lt;strong&gt;Epidermolysis bullosa simplex: a keratin 5 mutation is a fully dominant allele in epidermal cytoskeleton function.&lt;/strong&gt; Am. J. Hum. Genet. 56: 577-585, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7534039/&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;7534039&lt;/a&gt;]" pmid="7534039">Stephens et al. (1995)</a> reclassified the phenotype as the Koebner type based on the lack of keratin filament clumping on electron microscopy; they also identified a mutation in the KRT5 gene in affected individuals (see MOLECULAR GENETICS). <a href="https://pubmed.ncbi.nlm.nih.gov/?term=7534039+3372762" 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="#9" class="mim-tip-reference" title="Ryynanen, M., Knowlton, R. G., Uitto, J. &lt;strong&gt;Mapping of epidermolysis bullosa simplex mutation to chromosome 12.&lt;/strong&gt; Am. J. Hum. Genet. 49: 978-984, 1991.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/1718160/&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;1718160&lt;/a&gt;]" pmid="1718160">Ryynanen et al. (1991)</a> studied a 4-generation Finnish family with 14 members affected with EBS. A tendency towards generalized blistering was noted at birth or shortly thereafter and continued during early years of life. With advancing age, the blistering became localized predominantly on the hands and feet, and was worse during the summer months. Histopathology and electron microscopy demonstrated intraepidermal blistering with evidence of cytolysis of basal keratinocytes. The disorder in this family was mapped to the pericentromeric region of chromosome 12q and a mutation in the KRT5 gene later identified. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1718160" 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="#3" class="mim-tip-reference" title="Galligan, P., Listwan, P., Siller, G. M., Rothnagel, J. A. &lt;strong&gt;A novel mutation in the L12 domain of keratin 5 in the Koebner variant of epidermolysis bullosa simplex.&lt;/strong&gt; J. Invest. Derm. 111: 524-527, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9740251/&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;9740251&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1523-1747.1998.00308.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9740251">Galligan et al. (1998)</a> reported a 3-generation family with 4 affected members with EBS Koebner type and mutation in the KRT5 gene. Generalized blistering with minimal oral involvement developed at birth or in early infancy, and basal layer degeneration was seen on histopathologic investigation. Affected individuals exhibited significant variation in severity of symptoms. All reported that blistering was more severe and generalized during childhood, but the proband and his mother continued to suffer from generalized blistering, while other affected members of the family reported that with time, blistering rarely occurred outside of palmoplantar surfaces. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9740251" 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="#7" class="mim-tip-reference" title="Livingston, R. J., Sybert, V. P., Smith, L. T., Dale, B. A., Presland, R. B., Stephens, K. &lt;strong&gt;Expression of a truncated keratin 5 may contribute to severe palmar-plantar hyperkeratosis in epidermolysis bullosa simplex patients.&lt;/strong&gt; J. Invest. Derm. 116: 970-974, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11407989/&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;11407989&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1523-1747.2001.01324.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11407989">Livingston et al. (2001)</a> reported a 57-year-old man with a mutation in the KRT5 gene who presented at 3 to 4 days of age with widespread generalized blistering. He required multiple hospitalizations for blistering during childhood. Painful hyperkeratosis of the palms and soles developed in his teen years, whereas blistering improved somewhat with age. During his employment as a horse trainer, he would also blister on the buttocks and thighs. As an adult, he continued to get occasional blisters in the mouth and cutaneous blisters with increased heat and/or activity. His skin examination was striking for severe palmoplantar keratosis, underlying erythema in a 'glove and moccasin' distribution, and limited range of motion in the fingers. There was no scarring and no significant nail changes. Clinical, histologic, and ultrastructural features were consistent with a diagnosis of generalized EBS (Koebner subtype). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11407989" 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="#6" class="mim-tip-reference" title="Liovic, M., Stojan, J., Bowden, P. E., Gibbs, D., Vahlquist, A., Lane, E. B., Komel, R. &lt;strong&gt;A novel keratin 5 mutation (K5V186L) in a family with EBS-K: a conservative substitution can lead to development of different disease phenotypes.&lt;/strong&gt; J. Invest. Derm. 116: 964-969, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11407988/&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;11407988&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1523-1747.2001.01334.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11407988">Liovic et al. (2001)</a> studied a 3-generation family with 5 affected members with EBS Koebner type and mutation in the KRT5 gene. All affected individuals had widespread blistering on large areas of the trunk, neck, cheeks, and extremities from early childhood. A 2-year-old girl and her paternal aunt, whose age was not given, continued to have widespread blistering, but the girl's father and paternal grandfather had improved spontaneously at puberty with only minor blistering activity remaining on the sides of the palms and soles, and occasionally on the trunk when traumatized. The girl had occasional feeding problems due to erosions inside the mouth. Blistering was usually worse in heat and humidity. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11407988" 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><a href="#2" class="mim-tip-reference" title="Epstein, E. H., Jr. &lt;strong&gt;Personal Communication.&lt;/strong&gt; San Francisco, Calif. 5/5/1991."None>Epstein (1991)</a> cited evidence that linkage to the keratin gene cluster on chromosome 12 had been demonstrated in at least 1 family with generalized epidermolysis bullosa simplex.</p><p>In a large Finnish family with 14 affected members in 3 generations with generalized EBS, <a href="#8" class="mim-tip-reference" title="Ryynanen, M., Knowlton, R. G., Uitto, J. &lt;strong&gt;An epidermolysis bullosa simplex mutation maps to chromosome 12. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 49 (suppl.): 358 only, 1991."None>Ryynanen et al. (1991)</a> found linkage to DNA marker D12S17, which is located on 12q (maximum lod score of 4.65 at theta = 0.0). In the full report (<a href="#9" class="mim-tip-reference" title="Ryynanen, M., Knowlton, R. G., Uitto, J. &lt;strong&gt;Mapping of epidermolysis bullosa simplex mutation to chromosome 12.&lt;/strong&gt; Am. J. Hum. Genet. 49: 978-984, 1991.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/1718160/&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;1718160&lt;/a&gt;]" pmid="1718160">Ryynanen et al., 1991</a>), the maximum lod score for linkage to D12S17 was given as 5.55 at theta = 0.0. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1718160" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p>The transmission pattern of EBS2B in the families reported by <a href="#1" class="mim-tip-reference" title="Dong, W., Ryynanen, M., Uitto, J. &lt;strong&gt;Identification of a leucine-to-proline mutation in the keratin 5 gene in a family with the generalized Koebner type of epidermolysis bullosa simplex.&lt;/strong&gt; Hum. Mutat. 2: 94-102, 1993.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7686424/&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;7686424&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/humu.1380020206&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="7686424">Dong et al. (1993)</a> and <a href="#10" class="mim-tip-reference" title="Stephens, K., Zlotogorski, A., Smith, L., Ehrlich, P., Wijsman, E., Livingston, R. J., Sybert, V. P. &lt;strong&gt;Epidermolysis bullosa simplex: a keratin 5 mutation is a fully dominant allele in epidermal cytoskeleton function.&lt;/strong&gt; Am. J. Hum. Genet. 56: 577-585, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7534039/&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;7534039&lt;/a&gt;]" pmid="7534039">Stephens et al. (1995)</a> was consistent with autosomal dominant inheritance. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=7686424+7534039" 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 affected members of a large Finnish family with the generalized Koebner type of EBS in which <a href="#9" class="mim-tip-reference" title="Ryynanen, M., Knowlton, R. G., Uitto, J. &lt;strong&gt;Mapping of epidermolysis bullosa simplex mutation to chromosome 12.&lt;/strong&gt; Am. J. Hum. Genet. 49: 978-984, 1991.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/1718160/&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;1718160&lt;/a&gt;]" pmid="1718160">Ryynanen et al. (1991)</a> found linkage to 12q, <a href="#1" class="mim-tip-reference" title="Dong, W., Ryynanen, M., Uitto, J. &lt;strong&gt;Identification of a leucine-to-proline mutation in the keratin 5 gene in a family with the generalized Koebner type of epidermolysis bullosa simplex.&lt;/strong&gt; Hum. Mutat. 2: 94-102, 1993.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7686424/&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;7686424&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/humu.1380020206&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="7686424">Dong et al. (1993)</a> identified a heterozygous mutation in the KRT5 gene (L463P; <a href="/entry/148040#0002">148040.0002</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?term=7686424+1718160" 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 affected members of family EB13, previously described by <a href="#4" class="mim-tip-reference" title="Hacham-Zadeh, S., Rappersberger, K., Livshin, R., Konrad, K. &lt;strong&gt;Epidermolysis bullosa herpetiformis Dowling-Meara in a large family.&lt;/strong&gt; J. Am. Acad. Derm. 18: 702-706, 1988.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/3372762/&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;3372762&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0190-9622(88)70093-6&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="3372762">Hacham-Zadeh et al. (1988)</a>, with autosomal dominant epidermolysis bullosa simplex of the Koebner type, <a href="#10" class="mim-tip-reference" title="Stephens, K., Zlotogorski, A., Smith, L., Ehrlich, P., Wijsman, E., Livingston, R. J., Sybert, V. P. &lt;strong&gt;Epidermolysis bullosa simplex: a keratin 5 mutation is a fully dominant allele in epidermal cytoskeleton function.&lt;/strong&gt; Am. J. Hum. Genet. 56: 577-585, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7534039/&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;7534039&lt;/a&gt;]" pmid="7534039">Stephens et al. (1995)</a> identified a heterozygous mutation in the KRT5 gene (K173N; <a href="/entry/148040#0006">148040.0006</a>). One family member was homozygous for the K173N allele, having inherited it from each of her affected first-cousin parents. However, this patient showed no significant differences from heterozygotes in either the clinical severity or the ultrastructural organization of the homozygous keratin intermediate filament cytoskeleton. These data demonstrated that the K173N mutation behaves as a fully dominant allele. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=7534039+3372762" 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="#3" class="mim-tip-reference" title="Galligan, P., Listwan, P., Siller, G. M., Rothnagel, J. A. &lt;strong&gt;A novel mutation in the L12 domain of keratin 5 in the Koebner variant of epidermolysis bullosa simplex.&lt;/strong&gt; J. Invest. Derm. 111: 524-527, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9740251/&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;9740251&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1523-1747.1998.00308.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9740251">Galligan et al. (1998)</a> identified heterozygosity for a val7-to-ala mutation (V7A; <a href="/entry/148040#0010">148040.0010</a>) in the KRT5 gene in all affected members of a 3-generation family with EBS Koebner type. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9740251" 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 a 3-generation family with EBS Koebner type, <a href="#6" class="mim-tip-reference" title="Liovic, M., Stojan, J., Bowden, P. E., Gibbs, D., Vahlquist, A., Lane, E. B., Komel, R. &lt;strong&gt;A novel keratin 5 mutation (K5V186L) in a family with EBS-K: a conservative substitution can lead to development of different disease phenotypes.&lt;/strong&gt; J. Invest. Derm. 116: 964-969, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11407988/&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;11407988&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1523-1747.2001.01334.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11407988">Liovic et al. (2001)</a> identified a heterozygous val186-to-leu substitution (V186L; <a href="/entry/148040#0014">148040.0014</a>) in the KRT5 gene in all affected members. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11407988" 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 a 57-year-old man with EBS Koebner type, <a href="#7" class="mim-tip-reference" title="Livingston, R. J., Sybert, V. P., Smith, L. T., Dale, B. A., Presland, R. B., Stephens, K. &lt;strong&gt;Expression of a truncated keratin 5 may contribute to severe palmar-plantar hyperkeratosis in epidermolysis bullosa simplex patients.&lt;/strong&gt; J. Invest. Derm. 116: 970-974, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11407989/&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;11407989&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1523-1747.2001.01324.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11407989">Livingston et al. (2001)</a> identified a heterozygous nonsense mutation in the KRT5 gene (K472X; <a href="/entry/148040#0016">148040.0016</a>), predicting the synthesis of a truncated keratin-5, missing the entire tail domain and a highly conserved motif in the central rod. Ultrastructural analysis of the patient's nonhyperkeratotic skin was remarkable for basal keratinocytes with dense and irregular keratin filaments proximal to the basement membrane. The occurrence of severe palmoplantar hyperkeratosis suggested that the keratin-5 tail domain may have important functions in palmoplantar tissues. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11407989" 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="Dong1993" class="mim-anchor"></a>
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Dong, W., Ryynanen, M., Uitto, J.
<strong>Identification of a leucine-to-proline mutation in the keratin 5 gene in a family with the generalized Koebner type of epidermolysis bullosa simplex.</strong>
Hum. Mutat. 2: 94-102, 1993.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7686424/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7686424</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7686424" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1002/humu.1380020206" target="_blank">Full Text</a>]
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<a id="Epstein1991" class="mim-anchor"></a>
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Epstein, E. H., Jr.
<strong>Personal Communication.</strong>
San Francisco, Calif. 5/5/1991.
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<a id="3" class="mim-anchor"></a>
<a id="Galligan1998" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Galligan, P., Listwan, P., Siller, G. M., Rothnagel, J. A.
<strong>A novel mutation in the L12 domain of keratin 5 in the Koebner variant of epidermolysis bullosa simplex.</strong>
J. Invest. Derm. 111: 524-527, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9740251/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9740251</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9740251" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1523-1747.1998.00308.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="4" class="mim-anchor"></a>
<a id="Hacham-Zadeh1988" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Hacham-Zadeh, S., Rappersberger, K., Livshin, R., Konrad, K.
<strong>Epidermolysis bullosa herpetiformis Dowling-Meara in a large family.</strong>
J. Am. Acad. Derm. 18: 702-706, 1988.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/3372762/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">3372762</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=3372762" 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/s0190-9622(88)70093-6" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="5" class="mim-anchor"></a>
<a id="Has2020" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Has, C., Bauer, J. W., Bodemer, C., Bolling, M. C., Bruckner-Tuderman, L., Diem, A., Fine, J. D., Heagerty, A., Hovnanian, A., Marinkovich, M. P., Martinez, A. E., McGrath, J. A., and 10 others.
<strong>Consensus reclassification of inherited epidermolysis bullosa and other disorders with skin fragility.</strong>
Brit. J. Derm. 183: 614-627, 2020.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/32017015/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">32017015</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=32017015" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1111/bjd.18921" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="6" class="mim-anchor"></a>
<a id="Liovic2001" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Liovic, M., Stojan, J., Bowden, P. E., Gibbs, D., Vahlquist, A., Lane, E. B., Komel, R.
<strong>A novel keratin 5 mutation (K5V186L) in a family with EBS-K: a conservative substitution can lead to development of different disease phenotypes.</strong>
J. Invest. Derm. 116: 964-969, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11407988/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11407988</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11407988" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1523-1747.2001.01334.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="7" class="mim-anchor"></a>
<a id="Livingston2001" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Livingston, R. J., Sybert, V. P., Smith, L. T., Dale, B. A., Presland, R. B., Stephens, K.
<strong>Expression of a truncated keratin 5 may contribute to severe palmar-plantar hyperkeratosis in epidermolysis bullosa simplex patients.</strong>
J. Invest. Derm. 116: 970-974, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11407989/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11407989</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11407989" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1523-1747.2001.01324.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="8" class="mim-anchor"></a>
<a id="Ryynanen1991" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Ryynanen, M., Knowlton, R. G., Uitto, J.
<strong>An epidermolysis bullosa simplex mutation maps to chromosome 12. (Abstract)</strong>
Am. J. Hum. Genet. 49 (suppl.): 358 only, 1991.
</p>
</div>
</li>
<li>
<a id="9" class="mim-anchor"></a>
<a id="Ryynanen1991" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Ryynanen, M., Knowlton, R. G., Uitto, J.
<strong>Mapping of epidermolysis bullosa simplex mutation to chromosome 12.</strong>
Am. J. Hum. Genet. 49: 978-984, 1991.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/1718160/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">1718160</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1718160" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="10" class="mim-anchor"></a>
<a id="Stephens1995" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Stephens, K., Zlotogorski, A., Smith, L., Ehrlich, P., Wijsman, E., Livingston, R. J., Sybert, V. P.
<strong>Epidermolysis bullosa simplex: a keratin 5 mutation is a fully dominant allele in epidermal cytoskeleton function.</strong>
Am. J. Hum. Genet. 56: 577-585, 1995.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7534039/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7534039</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7534039" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
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alopez : 11/01/2021<br>alopez : 10/28/2021<br>alopez : 10/26/2021<br>alopez : 10/25/2021<br>alopez : 10/25/2021
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<h3>
<span class="mim-font">
<strong>#</strong> 619588
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<h3>
<span class="mim-font">
EPIDERMOLYSIS BULLOSA SIMPLEX 2B, GENERALIZED INTERMEDIATE; EBS2B
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<p>
<span class="mim-font">
<em>Alternative titles; symbols</em>
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<h4>
<span class="mim-font">
EPIDERMOLYSIS BULLOSA SIMPLEX 2B, KOEBNER TYPE
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<h4>
<span class="mim-font">
<strong>Phenotype-Gene Relationships</strong>
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<table class="table table-bordered table-condensed small mim-table-padding">
<thead>
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<th>
Location
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<th>
Phenotype
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<th>
Phenotype <br /> MIM number
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<th>
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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<td>
<span class="mim-font">
12q13.13
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<td>
<span class="mim-font">
Epidermolysis bullosa simplex 2B, generalized intermediate
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<span class="mim-font">
619588
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<span class="mim-font">
Autosomal dominant
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3
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KRT5
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<span class="mim-font">
148040
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<span class="mim-font">
<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because of evidence that generalized intermediate epidermolysis bullosa simplex-2B (EBS2B) is caused by heterozygous mutation in the KRT5 gene (148040) on chromosome 12q13.</p><p>Another form of generalized intermediate EBS, EBS1B (131900), is caused by mutation in the KRT14 gene (148066).</p>
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<span class="mim-font">
<strong>Description</strong>
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<p>Generalized intermediate epidermolysis bullosa simplex-2B (EBS2B) is an autosomal dominant disorder of skin in which intraepidermal blistering occurs after minor mechanical trauma. Skin blistering is generalized, begins at birth, and is worsened by heat, humidity, and sweating. The tendency to blistering diminishes in adolescence, when it may become localized to hands and feet. Intermediate EBS has previously been known as the Koebner type (summary by Has et al., 2020). </p><p>For a discussion of genetic heterogeneity of the subtypes of EBS, see EBS1A (131760).</p><p><strong><em>Reviews</em></strong></p><p>
Has et al. (2020) reviewed characteristic features and molecular bases of the subtypes of epidermolysis bullosa, and provided a consensus reclassification of disorders with skin fragility. </p>
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<strong>Clinical Features</strong>
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<p>Hacham-Zadeh et al. (1988) described a large Arab family originating from Jerusalem in which 38 affected individuals spanning 4 generations had EBS. Onset occurred between birth and 2 weeks of age. The main clinical features were bullae, generalized, solitary, and in groups, with predilection to the skin of the palms and soles. Mild to moderate patchy hyperkeratosis of the palms and soles was found in 5 affected members of the family. Blisters in oral mucous membranes were noted and found in summer and in periods of fever. Hair, teeth, and nails were normal. Improvement was noted by progression of age from 5 to 23 years, and by some in summer and by others in winter. Ultrastructural studies from a fresh blister disclosed intraepidermal blister via cytolysis of basal cell cytoplasm. The pedigree indicated transmission of an autosomal dominant gene. However, in 1 instance, affected first cousins were married and all 6 of their offspring were affected. There was marked intrafamilial variability. Although the family was originally thought to have the Dowling-Meara form of EBS, Stephens et al. (1995) reclassified the phenotype as the Koebner type based on the lack of keratin filament clumping on electron microscopy; they also identified a mutation in the KRT5 gene in affected individuals (see MOLECULAR GENETICS). </p><p>Ryynanen et al. (1991) studied a 4-generation Finnish family with 14 members affected with EBS. A tendency towards generalized blistering was noted at birth or shortly thereafter and continued during early years of life. With advancing age, the blistering became localized predominantly on the hands and feet, and was worse during the summer months. Histopathology and electron microscopy demonstrated intraepidermal blistering with evidence of cytolysis of basal keratinocytes. The disorder in this family was mapped to the pericentromeric region of chromosome 12q and a mutation in the KRT5 gene later identified. </p><p>Galligan et al. (1998) reported a 3-generation family with 4 affected members with EBS Koebner type and mutation in the KRT5 gene. Generalized blistering with minimal oral involvement developed at birth or in early infancy, and basal layer degeneration was seen on histopathologic investigation. Affected individuals exhibited significant variation in severity of symptoms. All reported that blistering was more severe and generalized during childhood, but the proband and his mother continued to suffer from generalized blistering, while other affected members of the family reported that with time, blistering rarely occurred outside of palmoplantar surfaces. </p><p>Livingston et al. (2001) reported a 57-year-old man with a mutation in the KRT5 gene who presented at 3 to 4 days of age with widespread generalized blistering. He required multiple hospitalizations for blistering during childhood. Painful hyperkeratosis of the palms and soles developed in his teen years, whereas blistering improved somewhat with age. During his employment as a horse trainer, he would also blister on the buttocks and thighs. As an adult, he continued to get occasional blisters in the mouth and cutaneous blisters with increased heat and/or activity. His skin examination was striking for severe palmoplantar keratosis, underlying erythema in a 'glove and moccasin' distribution, and limited range of motion in the fingers. There was no scarring and no significant nail changes. Clinical, histologic, and ultrastructural features were consistent with a diagnosis of generalized EBS (Koebner subtype). </p><p>Liovic et al. (2001) studied a 3-generation family with 5 affected members with EBS Koebner type and mutation in the KRT5 gene. All affected individuals had widespread blistering on large areas of the trunk, neck, cheeks, and extremities from early childhood. A 2-year-old girl and her paternal aunt, whose age was not given, continued to have widespread blistering, but the girl's father and paternal grandfather had improved spontaneously at puberty with only minor blistering activity remaining on the sides of the palms and soles, and occasionally on the trunk when traumatized. The girl had occasional feeding problems due to erosions inside the mouth. Blistering was usually worse in heat and humidity. </p>
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<h4>
<span class="mim-font">
<strong>Mapping</strong>
</span>
</h4>
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<span class="mim-text-font">
<p>Epstein (1991) cited evidence that linkage to the keratin gene cluster on chromosome 12 had been demonstrated in at least 1 family with generalized epidermolysis bullosa simplex.</p><p>In a large Finnish family with 14 affected members in 3 generations with generalized EBS, Ryynanen et al. (1991) found linkage to DNA marker D12S17, which is located on 12q (maximum lod score of 4.65 at theta = 0.0). In the full report (Ryynanen et al., 1991), the maximum lod score for linkage to D12S17 was given as 5.55 at theta = 0.0. </p>
</span>
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<h4>
<span class="mim-font">
<strong>Inheritance</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>The transmission pattern of EBS2B in the families reported by Dong et al. (1993) and Stephens et al. (1995) was consistent with autosomal dominant inheritance. </p>
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<div>
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<div>
<h4>
<span class="mim-font">
<strong>Molecular Genetics</strong>
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</h4>
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<span class="mim-text-font">
<p>In affected members of a large Finnish family with the generalized Koebner type of EBS in which Ryynanen et al. (1991) found linkage to 12q, Dong et al. (1993) identified a heterozygous mutation in the KRT5 gene (L463P; 148040.0002). </p><p>In affected members of family EB13, previously described by Hacham-Zadeh et al. (1988), with autosomal dominant epidermolysis bullosa simplex of the Koebner type, Stephens et al. (1995) identified a heterozygous mutation in the KRT5 gene (K173N; 148040.0006). One family member was homozygous for the K173N allele, having inherited it from each of her affected first-cousin parents. However, this patient showed no significant differences from heterozygotes in either the clinical severity or the ultrastructural organization of the homozygous keratin intermediate filament cytoskeleton. These data demonstrated that the K173N mutation behaves as a fully dominant allele. </p><p>Galligan et al. (1998) identified heterozygosity for a val7-to-ala mutation (V7A; 148040.0010) in the KRT5 gene in all affected members of a 3-generation family with EBS Koebner type. </p><p>In a 3-generation family with EBS Koebner type, Liovic et al. (2001) identified a heterozygous val186-to-leu substitution (V186L; 148040.0014) in the KRT5 gene in all affected members. </p><p>In a 57-year-old man with EBS Koebner type, Livingston et al. (2001) identified a heterozygous nonsense mutation in the KRT5 gene (K472X; 148040.0016), predicting the synthesis of a truncated keratin-5, missing the entire tail domain and a highly conserved motif in the central rod. Ultrastructural analysis of the patient's nonhyperkeratotic skin was remarkable for basal keratinocytes with dense and irregular keratin filaments proximal to the basement membrane. The occurrence of severe palmoplantar hyperkeratosis suggested that the keratin-5 tail domain may have important functions in palmoplantar tissues. </p>
</span>
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<div>
<h4>
<span class="mim-font">
<strong>REFERENCES</strong>
</span>
</h4>
<div>
<p />
</div>
<div>
<ol>
<li>
<p class="mim-text-font">
Dong, W., Ryynanen, M., Uitto, J.
<strong>Identification of a leucine-to-proline mutation in the keratin 5 gene in a family with the generalized Koebner type of epidermolysis bullosa simplex.</strong>
Hum. Mutat. 2: 94-102, 1993.
[PubMed: 7686424]
[Full Text: https://doi.org/10.1002/humu.1380020206]
</p>
</li>
<li>
<p class="mim-text-font">
Epstein, E. H., Jr.
<strong>Personal Communication.</strong>
San Francisco, Calif. 5/5/1991.
</p>
</li>
<li>
<p class="mim-text-font">
Galligan, P., Listwan, P., Siller, G. M., Rothnagel, J. A.
<strong>A novel mutation in the L12 domain of keratin 5 in the Koebner variant of epidermolysis bullosa simplex.</strong>
J. Invest. Derm. 111: 524-527, 1998.
[PubMed: 9740251]
[Full Text: https://doi.org/10.1046/j.1523-1747.1998.00308.x]
</p>
</li>
<li>
<p class="mim-text-font">
Hacham-Zadeh, S., Rappersberger, K., Livshin, R., Konrad, K.
<strong>Epidermolysis bullosa herpetiformis Dowling-Meara in a large family.</strong>
J. Am. Acad. Derm. 18: 702-706, 1988.
[PubMed: 3372762]
[Full Text: https://doi.org/10.1016/s0190-9622(88)70093-6]
</p>
</li>
<li>
<p class="mim-text-font">
Has, C., Bauer, J. W., Bodemer, C., Bolling, M. C., Bruckner-Tuderman, L., Diem, A., Fine, J. D., Heagerty, A., Hovnanian, A., Marinkovich, M. P., Martinez, A. E., McGrath, J. A., and 10 others.
<strong>Consensus reclassification of inherited epidermolysis bullosa and other disorders with skin fragility.</strong>
Brit. J. Derm. 183: 614-627, 2020.
[PubMed: 32017015]
[Full Text: https://doi.org/10.1111/bjd.18921]
</p>
</li>
<li>
<p class="mim-text-font">
Liovic, M., Stojan, J., Bowden, P. E., Gibbs, D., Vahlquist, A., Lane, E. B., Komel, R.
<strong>A novel keratin 5 mutation (K5V186L) in a family with EBS-K: a conservative substitution can lead to development of different disease phenotypes.</strong>
J. Invest. Derm. 116: 964-969, 2001.
[PubMed: 11407988]
[Full Text: https://doi.org/10.1046/j.1523-1747.2001.01334.x]
</p>
</li>
<li>
<p class="mim-text-font">
Livingston, R. J., Sybert, V. P., Smith, L. T., Dale, B. A., Presland, R. B., Stephens, K.
<strong>Expression of a truncated keratin 5 may contribute to severe palmar-plantar hyperkeratosis in epidermolysis bullosa simplex patients.</strong>
J. Invest. Derm. 116: 970-974, 2001.
[PubMed: 11407989]
[Full Text: https://doi.org/10.1046/j.1523-1747.2001.01324.x]
</p>
</li>
<li>
<p class="mim-text-font">
Ryynanen, M., Knowlton, R. G., Uitto, J.
<strong>An epidermolysis bullosa simplex mutation maps to chromosome 12. (Abstract)</strong>
Am. J. Hum. Genet. 49 (suppl.): 358 only, 1991.
</p>
</li>
<li>
<p class="mim-text-font">
Ryynanen, M., Knowlton, R. G., Uitto, J.
<strong>Mapping of epidermolysis bullosa simplex mutation to chromosome 12.</strong>
Am. J. Hum. Genet. 49: 978-984, 1991.
[PubMed: 1718160]
</p>
</li>
<li>
<p class="mim-text-font">
Stephens, K., Zlotogorski, A., Smith, L., Ehrlich, P., Wijsman, E., Livingston, R. J., Sybert, V. P.
<strong>Epidermolysis bullosa simplex: a keratin 5 mutation is a fully dominant allele in epidermal cytoskeleton function.</strong>
Am. J. Hum. Genet. 56: 577-585, 1995.
[PubMed: 7534039]
</p>
</li>
</ol>
<div>
<br />
</div>
</div>
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<span class="mim-text-font">
Anne M. Stumpf : 10/22/2021
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carol : 01/11/2022<br>alopez : 11/01/2021<br>alopez : 10/28/2021<br>alopez : 10/26/2021<br>alopez : 10/25/2021<br>alopez : 10/25/2021
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NOTE: OMIM is intended for use primarily by physicians and other professionals concerned with genetic disorders, by genetics researchers,
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