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<title>
Entry
- #614209 - MECKEL SYNDROME, TYPE 9; MKS9
- OMIM
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<span class="h4">#614209</span>
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<strong>Table of Contents</strong>
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<a href="#title"><strong>Title</strong></a>
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<a href="#phenotypeMap"><strong>Phenotype-Gene Relationships</strong></a>
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<a href="/clinicalSynopsis/614209"><strong>Clinical Synopsis</strong></a>
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<a href="/phenotypicSeries/PS249000"> <strong>Phenotypic Series</strong> </a>
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<a href="#text"><strong>Text</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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<a href="#molecularGenetics">Molecular Genetics</a>
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<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 id="mimClinicalResourcesLinksFold" class="panel-collapse collapse in mimLinksFold" role="tabpanel" aria-labelledby="clinicalResources">
<div class="panel-body small mim-panel-body">
<div><a href="https://clinicaltrials.gov/search?cond=(MECKEL SYNDROME, TYPE) OR (B9D1)" 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.orpha.net/consor/cgi-bin/ClinicalLabs_Search_Simple.php?lng=EN&LnkId=280&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.diseaseinfosearch.org/x/8798" class="mim-tip-hint" title="Network of disease-specific advocacy organizations, universities, private companies, government agencies, and public policy organizations." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Genetic Alliance', 'domain': 'diseaseinfosearch.org'})">Genetic Alliance</a></div>
<div><a href="https://medlineplus.gov/genetics/condition/meckel-syndrome" class="mim-tip-hint" title="Consumer-friendly information about the effects of genetic variation on human health." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'MedlinePlus Genetics', 'domain': 'medlineplus.gov'})">MedlinePlus Genetics</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/gtr/all/tests/?term=614209[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>
<div><a href="https://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&Expert=564" class="mim-tip-hint" title="European reference portal for information on rare diseases and orphan drugs." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'OrphaNet', 'domain': 'orpha.net'})">OrphaNet</a></div>
</div>
</div>
</div>
</div>
</div>
</div>
<span>
<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.">
&nbsp;
</span>
</span>
</div>
<div class="col-lg-8 col-lg-pull-2 col-md-8 col-md-pull-2 col-sm-8 col-sm-pull-2 col-xs-12">
<div>
<a id="title" class="mim-anchor"></a>
<div>
<a id="number" class="mim-anchor"></a>
<div class="text-right">
<a href="#" class="mim-tip-icd" qtip_title="<strong>ICD+</strong>" qtip_text="
<strong>ORPHA:</strong> 564<br />
">ICD+</a>
</div>
<div>
<span class="h3">
<span class="mim-font mim-tip-hint" title="Phenotype description, molecular basis known">
<span class="text-danger"><strong>#</strong></span>
614209
</span>
</span>
</div>
</div>
<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
MECKEL SYNDROME, TYPE 9; MKS9
</span>
</h3>
</div>
<div>
<br />
</div>
</div>
<div>
<a id="phenotypeMap" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>Phenotype-Gene Relationships</strong>
</span>
</h4>
<div>
<table class="table table-bordered table-condensed table-hover small mim-table-padding">
<thead>
<tr class="active">
<th>
Location
</th>
<th>
Phenotype
</th>
<th>
Phenotype <br /> MIM number
</th>
<th>
Inheritance
</th>
<th>
Phenotype <br /> mapping key
</th>
<th>
Gene/Locus
</th>
<th>
Gene/Locus <br /> MIM number
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/294?start=-3&limit=10&highlight=294">
17p11.2
</a>
</span>
</td>
<td>
<span class="mim-font">
?Meckel syndrome 9
<span class="mim-tip-hint" title="A question mark (?) indicates that the relationship between the phenotype and gene is provisional">
<span class="glyphicon glyphicon-question-sign" aria-hidden="true"></span>
</span>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614209"> 614209 </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">
B9D1
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614144"> 614144 </a>
</span>
</td>
</tr>
</tbody>
</table>
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<a href="/clinicalSynopsis/614209" class="btn btn-warning" role="button"> Clinical Synopsis </a>
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<a href="/phenotypicSeries/PS249000" class="btn btn-info" role="button"> Phenotypic Series </a>
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PheneGene Graphics <span class="caret"></span>
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<ul class="dropdown-menu" style="width: 17em;">
<li><a href="/graph/linear/614209" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/614209" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Radial'})"> Radial </a></li>
</ul>
</div>
<span class="glyphicon glyphicon-question-sign mim-tip-hint" title="OMIM PheneGene graphics depict relationships between phenotypes, groups of related phenotypes (Phenotypic Series), and genes.<br /><a href='/static/omim/pdf/OMIM_Graphics.pdf' target='_blank'>A quick reference overview and guide (PDF)</a>"></span>
<div>
<p />
</div>
<div id="mimClinicalSynopsisFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small" style="margin: 5px">
<div>
<div>
<span class="h5 mim-font">
<strong> INHERITANCE </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Autosomal recessive <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/258211005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">258211005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0441748&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0441748</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> ABDOMEN </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> External Features </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Enlarged abdomen <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0392025&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0392025</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> GENITOURINARY </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> External Genitalia (Male) </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Ambiguous genitalia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/21321009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">21321009</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q56.4" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q56.4</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0266362&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0266362</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000062" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000062</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000062" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000062</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Kidneys </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Cystic dysplasia <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3809436&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3809436</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Bladder </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Absence of bladder <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/22421007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">22421007</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0266336&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0266336</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> SKELETAL </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Limbs </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Short limbs <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0239399&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0239399</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0009826" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0009826</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0009826" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0009826</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Feet </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Club feet <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/397932003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">397932003</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/1156475005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">1156475005</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q66.0" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q66.0</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/Q66.89" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q66.89</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/754.51" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">754.51</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0009081&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0009081</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001762" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001762</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001762" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001762</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">
- Encephalocele, occipital <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/42376006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">42376006</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q01.2" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q01.2</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0014067&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0014067</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002085" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002085</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">
- One patient has been reported (last curated April 2015)<br /> -
Perinatal lethal<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 B9 domain-containing protein 1 gene (B9D1, <a href="/entry/614144#0001">614144.0001</a>)<br />
</span>
</div>
</div>
</div>
<div class="text-right">
<a href="#mimClinicalSynopsisFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
</div>
</div>
</div>
<div id="mimPhenotypicSeriesFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small">
<div class="row">
<div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
<h5>
Meckel syndrome
- <a href="/phenotypicSeries/PS249000">PS249000</a>
- 16 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/1/1552?start=-3&limit=10&highlight=1552"> 1q32.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616258"> ?Meckel syndrome 12 </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/616258"> 616258 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611279"> KIF14 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611279"> 611279 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/689?start=-3&limit=10&highlight=689"> 3q22.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/267010"> Meckel syndrome 7 </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/267010"> 267010 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608002"> NPHP3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608002"> 608002 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/4/106?start=-3&limit=10&highlight=106"> 4p15.32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612284"> Meckel syndrome 6 </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/612284"> 612284 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612013"> CC2D2A </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612013"> 612013 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/5/475?start=-3&limit=10&highlight=475"> 5q31.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619879"> Meckel syndrome 14 </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/619879"> 619879 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617778"> TXNDC15 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617778"> 617778 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/405?start=-3&limit=10&highlight=405"> 8q22.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607361"> Meckel syndrome 3 </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/607361"> 607361 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609884"> TMEM67 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609884"> 609884 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/455?start=-3&limit=10&highlight=455"> 11q12.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603194"> Meckel syndrome 2 </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/603194"> 603194 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613277"> TMEM216 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613277"> 613277 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/664?start=-3&limit=10&highlight=664"> 12q21.32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611134"> Meckel syndrome 4 </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/611134"> 611134 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610142"> CEP290 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610142"> 610142 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/934?start=-3&limit=10&highlight=934"> 12q24.31 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613885"> ?Meckel syndrome 8 </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/613885"> 613885 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613846"> TCTN2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613846"> 613846 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/436?start=-3&limit=10&highlight=436"> 16q12.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611561"> Meckel syndrome 5 </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/611561"> 611561 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610937"> RPGRIP1L </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610937"> 610937 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/652?start=-3&limit=10&highlight=652"> 16q23.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615397"> Meckel syndrome 11 </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/615397"> 615397 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614949"> TMEM231 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614949"> 614949 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/198?start=-3&limit=10&highlight=198"> 17p13.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617562"> ?Joubert syndrome 29 </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/617562"> 617562 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616183"> TMEM107 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616183"> 616183 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/198?start=-3&limit=10&highlight=198"> 17p13.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617562"> Meckel syndrome 13 </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/617562"> 617562 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616183"> TMEM107 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616183"> 616183 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/294?start=-3&limit=10&highlight=294"> 17p11.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614209"> ?Meckel syndrome 9 </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/614209"> 614209 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614144"> B9D1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614144"> 614144 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/781?start=-3&limit=10&highlight=781"> 17q22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/249000"> Meckel syndrome 1 </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/249000"> 249000 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609883"> MKS1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609883"> 609883 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/727?start=-3&limit=10&highlight=727"> 19q13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614175"> Joubert syndrome 34 </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/614175"> 614175 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611951"> B9D2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611951"> 611951 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/727?start=-3&limit=10&highlight=727"> 19q13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614175"> ?Meckel syndrome 10 </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/614175"> 614175 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611951"> B9D2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611951"> 611951 </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>
</span>
</span>
</h4>
<div id="mimTextFold" class="collapse in ">
<span class="mim-text-font">
<p>A number sign (#) is used with this entry because of evidence that Meckel syndrome-9 (MKS9) can be caused by compound heterozygous mutation in the B9D1 gene (<a href="/entry/614144">614144</a>) on chromosome 17p11.2. One such family has been reported.</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">
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<strong>Description</strong>
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</h4>
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<div id="mimDescriptionFold" class="collapse in ">
<span class="mim-text-font">
<p>Meckel syndrome is a severe autosomal recessive ciliopathy classically defined by the triad of encephalocele, polydactyly, and renal and biliary ductal dysplasia (summary by <a href="#1" class="mim-tip-reference" title="Hopp, K., Heyer, C. M., Hommerding, C. J., Henke, S. A., Sundsbak, J. L., Patel, S., Patel, P., Consugar, M. B., Czarnecki, P. G., Gliem, T. J., Torres, V. E., Rossetti, S., Harris, P. C. &lt;strong&gt;B9D1 is revealed as a novel Meckel syndrome (MKS) gene by targeted exon-enriched next-generation sequencing and deletion analysis.&lt;/strong&gt; Hum. Molec. Genet. 20: 2524-2534, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21493627/&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;21493627&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=21493627[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/10.1093/hmg/ddr151&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="21493627">Hopp et al., 2011</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21493627" 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 general phenotypic description and a discussion of genetic heterogeneity of Meckel syndrome, see MKS1 (<a href="/entry/249000">249000</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">
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<strong>Clinical Features</strong>
</span>
</h4>
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<div id="mimClinicalFeaturesFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p><a href="#1" class="mim-tip-reference" title="Hopp, K., Heyer, C. M., Hommerding, C. J., Henke, S. A., Sundsbak, J. L., Patel, S., Patel, P., Consugar, M. B., Czarnecki, P. G., Gliem, T. J., Torres, V. E., Rossetti, S., Harris, P. C. &lt;strong&gt;B9D1 is revealed as a novel Meckel syndrome (MKS) gene by targeted exon-enriched next-generation sequencing and deletion analysis.&lt;/strong&gt; Hum. Molec. Genet. 20: 2524-2534, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21493627/&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;21493627&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=21493627[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/10.1093/hmg/ddr151&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="21493627">Hopp et al. (2011)</a> reported a fetus with Meckel syndrome who was found by ultrasound at 13 weeks' gestation to have posterior encephalocele and abnormal posterior fossa, bilaterally enlarged multicystic dysplastic kidneys, and no bladder. Polydactyly was not noted, but the fetus had bilateral clubfeet and shortened limbs. By 16 weeks, the cystic kidneys were grossly enlarged, distorting the abdomen and compressing the diaphragm. The baby was born at 35 weeks, and survived 1.75 hours. Examination at birth indicated an enlarged abdomen, an irregular-shaped posterior encephalocele, bilateral clubfeet and ambiguous genitalia. The parents were nonconsanguineous. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21493627" 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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<div>
<a id="molecularGenetics" class="mim-anchor"></a>
<h4 href="#mimMolecularGeneticsFold" id="mimMolecularGeneticsToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
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<strong>Molecular Genetics</strong>
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</h4>
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<div id="mimMolecularGeneticsFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p><a href="#1" class="mim-tip-reference" title="Hopp, K., Heyer, C. M., Hommerding, C. J., Henke, S. A., Sundsbak, J. L., Patel, S., Patel, P., Consugar, M. B., Czarnecki, P. G., Gliem, T. J., Torres, V. E., Rossetti, S., Harris, P. C. &lt;strong&gt;B9D1 is revealed as a novel Meckel syndrome (MKS) gene by targeted exon-enriched next-generation sequencing and deletion analysis.&lt;/strong&gt; Hum. Molec. Genet. 20: 2524-2534, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21493627/&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;21493627&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=21493627[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/10.1093/hmg/ddr151&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="21493627">Hopp et al. (2011)</a> performed exon-enriched next-generation sequencing of 31 ciliopathy genes in 12 MKS pedigrees. In a fetus with posterior encephalocele, multicystic dysplastic kidneys, ambiguous genitalia, and bilateral clubfeet, they identified a heterozygous splice donor site change in the B9D1 gene (505+2T-C; <a href="/entry/614144#0001">614144.0001</a>), which was inherited from the father. Reverse transcriptase-PCR analysis of B9D1 in fetal RNA revealed a single smaller than normal mRNA product lacking exon 4. Array CGH showed that the second mutation was a 1.71-Mb de novo deletion (<a href="/entry/614144#0002">614144.0002</a>) at chromosome 17p11.1, eliminating the entire B9D1 gene and 18 other genes. Immunofluorescence analysis revealed a significantly lower level of ciliated patient cells compared to controls, confirming a role for B9D1 in ciliogenesis. From the mother, the fetus inherited an additional, likely pathogenic novel missense change (R2210C) in a second MKS gene, CEP290 (<a href="/entry/610142">610142</a>), suggesting oligogenic inheritance in this case. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21493627" 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="references"class="mim-anchor"></a>
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<strong>REFERENCES</strong>
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<a id="Hopp2011" class="mim-anchor"></a>
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Hopp, K., Heyer, C. M., Hommerding, C. J., Henke, S. A., Sundsbak, J. L., Patel, S., Patel, P., Consugar, M. B., Czarnecki, P. G., Gliem, T. J., Torres, V. E., Rossetti, S., Harris, P. C.
<strong>B9D1 is revealed as a novel Meckel syndrome (MKS) gene by targeted exon-enriched next-generation sequencing and deletion analysis.</strong>
Hum. Molec. Genet. 20: 2524-2534, 2011.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/21493627/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">21493627</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=21493627[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=21493627" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1093/hmg/ddr151" target="_blank">Full Text</a>]
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George E. Tiller : 9/2/2011
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ckniffin : 04/13/2015
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carol : 2/2/2012<br>carol : 9/2/2011<br>carol : 9/2/2011
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<strong>#</strong> 614209
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MECKEL SYNDROME, TYPE 9; MKS9
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<strong>ORPHA:</strong> 564; &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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17p11.2
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?Meckel syndrome 9
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614209
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Autosomal recessive
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3
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B9D1
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614144
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because of evidence that Meckel syndrome-9 (MKS9) can be caused by compound heterozygous mutation in the B9D1 gene (614144) on chromosome 17p11.2. One such family has been reported.</p>
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<strong>Description</strong>
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<p>Meckel syndrome is a severe autosomal recessive ciliopathy classically defined by the triad of encephalocele, polydactyly, and renal and biliary ductal dysplasia (summary by Hopp et al., 2011). </p><p>For a general phenotypic description and a discussion of genetic heterogeneity of Meckel syndrome, see MKS1 (249000).</p>
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<strong>Clinical Features</strong>
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<p>Hopp et al. (2011) reported a fetus with Meckel syndrome who was found by ultrasound at 13 weeks' gestation to have posterior encephalocele and abnormal posterior fossa, bilaterally enlarged multicystic dysplastic kidneys, and no bladder. Polydactyly was not noted, but the fetus had bilateral clubfeet and shortened limbs. By 16 weeks, the cystic kidneys were grossly enlarged, distorting the abdomen and compressing the diaphragm. The baby was born at 35 weeks, and survived 1.75 hours. Examination at birth indicated an enlarged abdomen, an irregular-shaped posterior encephalocele, bilateral clubfeet and ambiguous genitalia. The parents were nonconsanguineous. </p>
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<strong>Molecular Genetics</strong>
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<p>Hopp et al. (2011) performed exon-enriched next-generation sequencing of 31 ciliopathy genes in 12 MKS pedigrees. In a fetus with posterior encephalocele, multicystic dysplastic kidneys, ambiguous genitalia, and bilateral clubfeet, they identified a heterozygous splice donor site change in the B9D1 gene (505+2T-C; 614144.0001), which was inherited from the father. Reverse transcriptase-PCR analysis of B9D1 in fetal RNA revealed a single smaller than normal mRNA product lacking exon 4. Array CGH showed that the second mutation was a 1.71-Mb de novo deletion (614144.0002) at chromosome 17p11.1, eliminating the entire B9D1 gene and 18 other genes. Immunofluorescence analysis revealed a significantly lower level of ciliated patient cells compared to controls, confirming a role for B9D1 in ciliogenesis. From the mother, the fetus inherited an additional, likely pathogenic novel missense change (R2210C) in a second MKS gene, CEP290 (610142), suggesting oligogenic inheritance in this case. </p>
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<strong>REFERENCES</strong>
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<p />
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<ol>
<li>
<p class="mim-text-font">
Hopp, K., Heyer, C. M., Hommerding, C. J., Henke, S. A., Sundsbak, J. L., Patel, S., Patel, P., Consugar, M. B., Czarnecki, P. G., Gliem, T. J., Torres, V. E., Rossetti, S., Harris, P. C.
<strong>B9D1 is revealed as a novel Meckel syndrome (MKS) gene by targeted exon-enriched next-generation sequencing and deletion analysis.</strong>
Hum. Molec. Genet. 20: 2524-2534, 2011.
[PubMed: 21493627]
[Full Text: https://doi.org/10.1093/hmg/ddr151]
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George E. Tiller : 9/2/2011
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Edit History:
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ckniffin : 04/13/2015<br>carol : 2/2/2012<br>carol : 9/2/2011<br>carol : 9/2/2011
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