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<meta name="keywords" content="C1861866, absent/hypoplastic corpus callosum, agenesis/hypoplastic corpus callosum, aplasia/hypoplasia of the corpus callosum, complete or partial absence of the corpus callosum, finding, hypoplasia or absence of the corpus callosum, hypoplastic or absent corpus callosum, autosomal dominant, autosomal recessive, birth defects, chromosomal disease, chromosome, clinical features, clinical findings, clinical genetics, clinical recommendations, clinvar, congenital chromosomal disease, consumer genetic resources, cytogenetic location, disease characteristics, disease definitions, disease descriptions, disease ontology, disease synonyms, disease vocabulary, dysmorphology, entrez, familial disease, gene, gene-disease relationship, genereviews, genetic disease, genetic disorder, genetic terminology, genetic testing registry, genetics home reference, genomic disease, gtr, hereditary disease, heritable disease, hpo, human phenotype ontology, inherited disease, management guidelines, maternal inheritance, medgen, medical genetics, medical subject headings, mesh, mitochondrial inheritance, mode of inheritance, national center for biotechnology information, national institutes of health, national library of medicine, ncbi, nih, nlm, omim, ordo, orphanet, paternal inheritance, phenome, position statements, professional practice guidelines, rare disease, reference sequence, refseq, snomed ct, syndrome, undiagnosed diseases, x-linked recessive" /><meta name="description" content="Absence or underdevelopment of the corpus callosum." /><meta name="robots" content="index,nofollow,noarchive" />
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<title>Aplasia/Hypoplasia of the corpus callosum (Concept Id: C1861866)
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<!--
UID=354608
ConceptID=C1861866
-->
<!--imgCountBooks = 0--><h1 class="medgenTitle"><div class="MedGenTitleText">Aplasia/Hypoplasia of the corpus callosum</div></h1><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>354608</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information."><span class="highlight" style="background-color:">C1861866</span></a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div><table class="medgenTable"><tbody><tr><td>Synonyms:</td>
<td>Absent/Hypoplastic corpus callosum; Complete or partial absence of the corpus callosum; Hypoplasia or absence of the corpus callosum; Hypoplastic or absent corpus callosum</td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td>HPO:</td>
<td><a target="_blank" title="Human Phenotype Ontology" href="https://hpo.jax.org/app/browse/term/HP:0007370">HP:0007370</a></td></tr>
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<div class="portlet mgSection" id="ID_100">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Definition">Definition</h1><a sid="100" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln">Absence or underdevelopment of the corpus callosum. [from <a title="Human Phenotype Ontology" href="http://www.human-phenotype-ontology.org" class="defSource" target="_blank">HPO</a>]</div>
</div>
<div class="portlet mgSection" id="ID_118">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Term_Hierarchy">Term Hierarchy</h1><a sid="118" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln HierarchyGTR"><div class="jig-ncbitabs"><ul><li><a href="#tabGTR">GTR</a></li><li><a href="#tabMGEN">MeSH</a></li></ul><div id="tabGTR"><div class="search_result"><div class="rprts"><div class="chiclet_legend"><span class="chiclet_list" style="position:static;"><span title="Clinical test" class="chiclet Ccolor round">C</span><span>Clinical test,  </span><span title="Research test" class="chiclet Rcolor round">R</span><span>Research test,  </span><span title="OMIM" class="chiclet Ocolor ">O</span><span>OMIM,  </span><span title="GeneReview" class="chiclet Gcolor">G</span><span><em>GeneReviews</em>,  </span><span title="ClinVar" class="chiclet Vcolor">V</span><span>ClinVar  </span></span></div><div id="hierarchy" class="margin_t1"><div class="ds_tree"><ul><li class="matched_ds"><span class="chiclet_list"><span class="chiclet Ccolor round" title="Clinical test"><a target="_blank" href="/gtr/tests/?term=C1861866[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=354608">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet unavailable" title="OMIM">O</span><span class="chiclet unavailable" title="GeneReviews">G</span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=354608" ref="ncbi_uid=354608">V</a></span></span><span class="TLline">Aplasia/Hypoplasia of the corpus callosum</span></li></ul></div></div></div></div></div><div id="tabMGEN"><div class="ds_tree"><ul><li><span class="TLline"><a href="/medgen/866620" ref="tree=MeSH" title="MedGen record for Abnormal forebrain morphology">Abnormal forebrain morphology</a></span><ul><li><span class="TLline"><a href="/medgen/867394" ref="tree=MeSH" title="MedGen record for Abnormal cerebral morphology">Abnormal cerebral morphology</a></span><ul><li><span class="TLline"><a href="/medgen/866852" ref="tree=MeSH" title="MedGen record for Abnormal cerebral subcortex morphology">Abnormal cerebral subcortex morphology</a></span><ul><li><span class="TLline"><a href="/medgen/181756" ref="tree=MeSH" title="MedGen record for Abnormal cerebral white matter morphology">Abnormal cerebral white matter morphology</a></span><ul><li><span class="TLline"><a href="/medgen/334198" ref="tree=MeSH" title="MedGen record for Abnormal corpus callosum morphology">Abnormal corpus callosum morphology</a></span><ul><li><span class="TLline"><a href="/medgen/1785336" ref="tree=MeSH" title="MedGen record for Thin corpus callosum">Thin corpus callosum</a></span><ul><li><span class="matched_ds">Aplasia/Hypoplasia of the corpus callosum</span><ul><li><span class="TLline"><a href="/medgen/104498" ref="tree=MeSH" title="MedGen record for Corpus callosum, agenesis of">Corpus callosum, agenesis of</a></span><ul><li><span class="TLline"><a href="/medgen/162915" ref="tree=MeSH" title="MedGen record for Acrocallosal syndrome">Acrocallosal syndrome</a></span></li><li><span class="TLline"><a href="/medgen/61236" ref="tree=MeSH" title="MedGen record for Aicardi syndrome">Aicardi syndrome</a></span></li><li><span class="TLline"><a href="/medgen/38214" ref="tree=MeSH" title="MedGen record for Holoprosencephaly sequence">Holoprosencephaly sequence</a></span><ul><li><span class="TLline"><a href="/medgen/78541" ref="tree=MeSH" title="MedGen record for Agnathia-otocephaly complex">Agnathia-otocephaly complex</a></span></li><li><span class="TLline"><a href="/medgen/140909" ref="tree=MeSH" title="MedGen record for Alobar holoprosencephaly">Alobar holoprosencephaly</a></span></li><li><span class="TLline"><a href="/medgen/382704" ref="tree=MeSH" title="MedGen record for Chromosome 1q41-q42 deletion syndrome">Chromosome 1q41-q42 deletion syndrome</a></span></li><li><span class="TLline"><a href="/medgen/78617" ref="tree=MeSH" title="MedGen record for Cyclopia">Cyclopia</a></span></li><li><span class="TLline"><a href="/medgen/452352" ref="tree=MeSH" title="MedGen record for Ethmocephaly">Ethmocephaly</a></span></li><li><span class="TLline"><a href="/medgen/335111" ref="tree=MeSH" title="MedGen record for Hartsfield-Bixler-Demyer syndrome">Hartsfield-Bixler-Demyer syndrome</a></span></li><li><span class="TLline"><a href="/medgen/322517" ref="tree=MeSH" title="MedGen record for Holoprosencephaly 2">Holoprosencephaly 2</a></span></li><li><span class="TLline"><a href="/medgen/327125" ref="tree=MeSH" title="MedGen record for Holoprosencephaly 3">Holoprosencephaly 3</a></span></li><li><span class="TLline"><a href="/medgen/374488" ref="tree=MeSH" title="MedGen record for Holoprosencephaly 4">Holoprosencephaly 4</a></span></li><li><span class="TLline"><a href="/medgen/355304" ref="tree=MeSH" title="MedGen record for Holoprosencephaly 5">Holoprosencephaly 5</a></span></li><li><span class="TLline"><a href="/medgen/342979" ref="tree=MeSH" title="MedGen record for Holoprosencephaly 6">Holoprosencephaly 6</a></span></li><li><span class="TLline"><a href="/medgen/372134" ref="tree=MeSH" title="MedGen record for Holoprosencephaly 7">Holoprosencephaly 7</a></span></li><li><span class="TLline"><a href="/medgen/322873" ref="tree=MeSH" title="MedGen record for Holoprosencephaly 8">Holoprosencephaly 8</a></span></li><li><span class="TLline"><a href="/medgen/324369" ref="tree=MeSH" title="MedGen record for Holoprosencephaly 9">Holoprosencephaly 9</a></span></li><li><span class="TLline"><a href="/medgen/441620" ref="tree=MeSH" title="MedGen record for Holoprosencephaly caudal dysgenesis">Holoprosencephaly caudal dysgenesis</a></span></li><li><span class="TLline"><a href="/medgen/441187" ref="tree=MeSH" title="MedGen record for Holoprosencephaly deletion 2p">Holoprosencephaly deletion 2p</a></span></li><li><span class="TLline"><a href="/medgen/441188" ref="tree=MeSH" title="MedGen record for Holoprosencephaly ectrodactyly cleft lip palate">Holoprosencephaly ectrodactyly cleft lip palate</a></span></li><li><span class="TLline"><a href="/medgen/441189" ref="tree=MeSH" title="MedGen record for Holoprosencephaly radial heart renal anomalies">Holoprosencephaly radial heart renal anomalies</a></span></li><li><span class="TLline"><a href="/medgen/343987" ref="tree=MeSH" title="MedGen record for Holoprosencephaly, recurrent infections, and monocytosis">Holoprosencephaly, recurrent infections, and monocytosis</a></span></li><li><span class="TLline"><a href="/medgen/330464" ref="tree=MeSH" title="MedGen record for Holoprosencephaly-craniosynostosis syndrome">Holoprosencephaly-craniosynostosis syndrome</a></span></li><li><span class="TLline"><a href="/medgen/336097" ref="tree=MeSH" title="MedGen record for Holoprosencephaly-hypokinesia-congenital contractures syndrome">Holoprosencephaly-hypokinesia-congenital contractures syndrome</a></span></li><li><span class="TLline"><a href="/medgen/340382" ref="tree=MeSH" title="MedGen record for Holoprosencephaly-postaxial polydactyly syndrome">Holoprosencephaly-postaxial polydactyly syndrome</a></span></li><li><span class="TLline"><a href="/medgen/343380" ref="tree=MeSH" title="MedGen record for Lambotte syndrome">Lambotte syndrome</a></span></li><li><span class="TLline"><a href="/medgen/96559" ref="tree=MeSH" title="MedGen record for Lobar holoprosencephaly">Lobar holoprosencephaly</a></span></li><li><span class="TLline"><a href="/medgen/798407" ref="tree=MeSH" title="MedGen record for Midline interhemispheric variant of holoprosencephaly">Midline interhemispheric variant of holoprosencephaly</a></span></li><li><span class="TLline"><a href="/medgen/468539" ref="tree=MeSH" title="MedGen record for NODAL-Related Holoprosencephaly">NODAL-Related Holoprosencephaly</a></span></li><li><span class="TLline"><a href="/medgen/199694" ref="tree=MeSH" title="MedGen record for Semilobar holoprosencephaly">Semilobar holoprosencephaly</a></span></li><li><span class="TLline"><a href="/medgen/1843386" ref="tree=MeSH" title="MedGen record for Septopreoptic holoprosencephaly">Septopreoptic holoprosencephaly</a></span></li><li><span class="TLline"><a href="/medgen/1708682" ref="tree=MeSH" title="MedGen record for Syntelencephaly">Syntelencephaly</a></span></li></ul></li><li><span class="TLline"><a href="/medgen/98127" ref="tree=MeSH" title="MedGen record for Partial agenesis of the corpus callosum">Partial agenesis of the corpus callosum</a></span></li><li><span class="TLline"><a href="/medgen/90926" ref="tree=MeSH" title="MedGen record for Septo-optic dysplasia sequence">Septo-optic dysplasia sequence</a></span></li></ul></li><li><span class="TLline"><a href="/medgen/138005" ref="tree=MeSH" title="MedGen record for Hypoplasia of the corpus callosum">Hypoplasia of the corpus callosum</a></span><ul><li><span class="TLline"><a href="/medgen/376765" ref="tree=MeSH" title="MedGen record for Hypodysplasia of the corpus callosum">Hypodysplasia of the corpus callosum</a></span></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></li></ul></div></div></div></div>
</div>
<div class="portlet mgSection" id="ID_112">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Conditions_with_this_feature">Conditions with this feature</h1><a sid="112" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln clinfeat">
<div class="divPopper rprt" id="rdis_162915"><div><strong>Acrocallosal syndrome</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>162915</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0796147</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Classic Joubert syndrome (JS) is characterized by three primary findings: A distinctive cerebellar and brain stem malformation called the molar tooth sign (MTS). Hypotonia. Developmental delays. Often these findings are accompanied by episodic tachypnea or apnea and/or atypical eye movements. In general, the breathing abnormalities improve with age, truncal ataxia develops over time, and acquisition of gross motor milestones is delayed. Cognitive abilities are variable, ranging from severe intellectual disability to normal. Additional findings can include retinal dystrophy, renal disease, ocular colobomas, occipital encephalocele, hepatic fibrosis, polydactyly, oral hamartomas, and endocrine abnormalities. Both intra- and interfamilial variation are seen.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/162915">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_266149"><div><strong>Cardio-facio-cutaneous syndrome</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>266149</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1275081</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Cardiofaciocutaneous (CFC) syndrome is characterized by cardiac abnormalities (pulmonic stenosis and other valve dysplasias, septal defects, hypertrophic cardiomyopathy, rhythm disturbances), distinctive craniofacial appearance, and cutaneous abnormalities (including xerosis, hyperkeratosis, ichthyosis, keratosis pilaris, ulerythema ophryogenes, eczema, pigmented moles, hemangiomas, and palmoplantar hyperkeratosis). The hair is typically sparse, curly, fine or thick, and woolly or brittle; eyelashes and eyebrows may be absent or sparse. Nails may be dystrophic or fast growing. Affected individuals typically have some form of neurologic and/or cognitive delay (ranging from mild to severe). Most individuals have severe feeding issues, which can contribute to poor growth, and many require nasogastric or gastrostomy tube feeding. Many affected individuals have eye findings, including strabismus, nystagmus, refractive errors, and optic nerve hypoplasia. Seizures may be present and can be refractory to therapy.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/266149">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_381553"><div><strong>Microcephaly-micromelia syndrome</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>381553</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1855079</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Microcephaly-micromelia syndrome (MIMIS) is a severe autosomal recessive disorder that usually results in death in utero or in the perinatal period. Affected individuals have severe growth retardation with microcephaly and variable malformations of the limbs, particularly the upper limbs. Defects include radial ray anomalies, malformed digits, and clubfeet (summary by Evrony et al., 2017).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/381553">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_347406"><div><strong>Donnai-Barrow syndrome</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>347406</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1857277</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Donnai-Barrow syndrome (DBS) is characterized by typical craniofacial features (large anterior fontanelle, wide metopic suture, widow's peak, markedly widely spaced eyes, enlarged globes, downslanted palpebral fissures, posteriorly rotated ears, depressed nasal bridge, and short nose. Ocular complications include high myopia, retinal detachment, retinal dystrophy, and progressive vision loss. Additional common features include agenesis of the corpus callosum, sensorineural hearing loss, intellectual disability, and congenital diaphragmatic hernia and/or omphalocele. Both inter- and intrafamilial phenotypic variability are observed.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/347406">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_355268"><div><strong>Microphthalmia with brain and digit anomalies</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>355268</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1864689</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">This syndrome has characteristics of anophthalmia or microphthalmia, retinal dystrophy, and/or myopia, associated in some cases with cerebral anomalies. It has been described in two families. Polydactyly may also be present. Linkage analysis allowed identification of mutations in the BMP4 gene, which has already been shown to play a role in eye development.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/355268">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_400801"><div><strong>Desmosterolosis</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>400801</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C1865596</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Desmosterolosis is a rare autosomal recessive disorder characterized by multiple congenital anomalies and elevated levels of the cholesterol precursor desmosterol in plasma, tissue, and cultured cells (summary by Waterham et al., 2001).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/400801">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_462869"><div><strong>Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A3</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>462869</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C3151519</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">An autosomal recessive muscular dystrophy caused by mutations in the POMGNT1 gene. It is associated with characteristic brain and eye malformations, profound mental retardation, and death usually in the first years of life.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/462869">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_477139"><div><strong>Multiple congenital anomalies-hypotonia-seizures syndrome 2</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>477139</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C3275508</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Multiple congenital anomalies-hypotonia-seizures syndrome-2 (MCAHS2) is an X-linked recessive neurodevelopmental disorder characterized by dysmorphic features, neonatal hypotonia, early-onset myoclonic seizures, and variable congenital anomalies involving the central nervous, cardiac, and urinary systems. Some affected individuals die in infancy (summary by Johnston et al., 2012). The phenotype shows clinical variability with regard to severity and extraneurologic features. However, most patients present in infancy with early-onset epileptic encephalopathy associated with developmental arrest and subsequent severe neurologic disability; these features are consistent with a form of developmental and epileptic encephalopathy (DEE) (summary by Belet et al., 2014, Kato et al., 2014). The disorder is caused by a defect in glycosylphosphatidylinositol (GPI) biosynthesis.&#13; For a discussion of genetic heterogeneity of MCAHS, see MCAHS1 (614080).&#13; For a discussion of nomenclature and genetic heterogeneity of DEE, see 308350.&#13; For a discussion of genetic heterogeneity of GPI biosynthesis defects, see GPIBD1 (610293).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/477139">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_902346"><div><strong>Severe intellectual disability-corpus callosum agenesis-facial dysmorphism-cerebellar ataxia syndrome</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>902346</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4225193</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">A rare genetic neurological disorder with characteristics of congenital microcephaly, severe intellectual disability, hypertonia at birth lessening with age, ataxia and specific dysmorphic facial features including hirsutism, low anterior hairline and bitemporal narrowing arched thick and medially sparse eyebrows, long eyelashes, lateral upper eyelids swelling and a skin fold partially covering the inferior eyelids, low-set posteriorly rotated protruding ears, anteverted nares and a full lower lip. Brain imaging shows partial to almost complete agenesis of the corpus callosum and variable degrees of cerebellar hypoplasia. Caused by homozygous mutation in the FRMD4A gene on chromosome 10p13.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/902346">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_1644017"><div><strong>RAB23-related Carpenter syndrome</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1644017</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4551510</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Any Carpenter syndrome in which the cause of the disease is a mutation in the RAB23 gene.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1644017">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_1634304"><div><strong>Alkuraya-Kucinskas syndrome</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1634304</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4693347</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">ALKKUCS is an autosomal recessive severe neurodevelopmental disorder characterized by arthrogryposis, brain abnormalities associated with cerebral parenchymal underdevelopment, and global developmental delay. Most affected individuals die in utero or soon after birth. Additional abnormalities may include hypotonia, dysmorphic facial features, and involvement of other organ systems, such as cardiac or renal. The few patients who survive have variable intellectual disability and may have seizures (summary by Gueneau et al., 2018).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1634304">Condition Record</a></div></div>
<div class="divPopper rprt" id="rdis_1648474"><div><strong>Peroxisome biogenesis disorder 1A (Zellweger)</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1648474</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4721541</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Zellweger spectrum disorder (ZSD) is a phenotypic continuum ranging from severe to mild. While individual phenotypes (e.g., Zellweger syndrome [ZS], neonatal adrenoleukodystrophy [NALD], and infantile Refsum disease [IRD]) were described in the past before the biochemical and molecular bases of this spectrum were fully determined, the term "ZSD" is now used to refer to all individuals with a defect in one of the ZSD-PEX genes regardless of phenotype. Individuals with ZSD usually come to clinical attention in the newborn period or later in childhood. Affected newborns are hypotonic and feed poorly. They have distinctive facies, congenital malformations (neuronal migration defects associated with neonatal-onset seizures, renal cysts, and bony stippling [chondrodysplasia punctata] of the patella[e] and the long bones), and liver disease that can be severe. Infants with severe ZSD are significantly impaired and typically die during the first year of life, usually having made no developmental progress. Individuals with intermediate/milder ZSD do not have congenital malformations, but rather progressive peroxisome dysfunction variably manifest as sensory loss (secondary to retinal dystrophy and sensorineural hearing loss), neurologic involvement (ataxia, polyneuropathy, and leukodystrophy), liver dysfunction, adrenal insufficiency, and renal oxalate stones. While hypotonia and developmental delays are typical, intellect can be normal. Some have osteopenia; almost all have ameleogenesis imperfecta in the secondary teeth.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1648474">Condition Record</a></div></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_162915" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Acrocallosal syndrome</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_1634304" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Alkuraya-Kucinskas syndrome</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_266149" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Cardio-facio-cutaneous syndrome</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_400801" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Desmosterolosis</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_347406" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Donnai-Barrow syndrome</a></div><div class="jig-moreless" data-jigconfig="class: 'moveDown', moreText: 'See full list (12)', lessText: 'Show less', nodeBefore: 0"><span id="clinMore">
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_381553" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Microcephaly-micromelia syndrome</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_355268" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Microphthalmia with brain and digit anomalies</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_477139" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Multiple congenital anomalies-hypotonia-seizures syndrome 2</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_462869" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A3</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_1648474" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Peroxisome biogenesis disorder 1A (Zellweger)</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_1644017" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">RAB23-related Carpenter syndrome</a></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#rdis_902346" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Severe intellectual disability-corpus callosum agenesis-facial dysmorphism-cerebellar ataxia syndrome</a></div></span></div></div>
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<div class="display-none help-popup" id="guidelinesHelpPM">These guidelines are articles in PubMed that match specific search criteria developed by MedGen to capture the most relevant practice guidelines. This list may not be comprehensive and may include broader topics as well. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div><div class="display-none help-popup" id="guidelinesHelpCurated">These guidelines are manually curated by the MedGen team
to supplement articles available in PubMed. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div>
<div class="portlet mgSection" id="ID_103">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Recent_clinical_studies">Recent clinical studies</h1><a sid="103" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><h3 class="subhead">Diagnosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/29858378">17p13.3 quadruplication: a prenatal and postpartum clinical characterization of a copy number variant.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Farris N,
Wu H,
Said-Delgado S,
Suskin B,
Klugman S</span><br />
<span class="medgenPMjournal">Cold Spring Harb Mol Case Stud</span>
2018 Jun;4(3)
Epub 2018 Jun 1
doi: 10.1101/mcs.a002196.
<span class="bold">PMID: </span><a href="/pubmed/29858378" target="_blank">29858378</a><a href="/pmc/articles/PMC5983170" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/29549119">The case for early use of rapid whole-genome sequencing in management of critically ill infants: late diagnosis of Coffin-Siris syndrome in an infant with left congenital diaphragmatic hernia, congenital heart disease, and recurrent infections.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Sweeney NM,
Nahas SA,
Chowdhury S,
Campo MD,
Jones MC,
Dimmock DP,
Kingsmore SF;
RCIGM Investigators</span><br />
<span class="medgenPMjournal">Cold Spring Harb Mol Case Stud</span>
2018 Jun;4(3)
Epub 2018 Jun 1
doi: 10.1101/mcs.a002469.
<span class="bold">PMID: </span><a href="/pubmed/29549119" target="_blank">29549119</a><a href="/pmc/articles/PMC5983173" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/29305346">A de novo nonsense mutation in ASXL3 shared by siblings with Bainbridge-Ropers syndrome.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Koboldt DC,
Mihalic Mosher T,
Kelly BJ,
Sites E,
Bartholomew D,
Hickey SE,
McBride K,
Wilson RK,
White P</span><br />
<span class="medgenPMjournal">Cold Spring Harb Mol Case Stud</span>
2018 Jun;4(3)
Epub 2018 Jun 1
doi: 10.1101/mcs.a002410.
<span class="bold">PMID: </span><a href="/pubmed/29305346" target="_blank">29305346</a><a href="/pmc/articles/PMC5983172" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Aplasia%2FHypoplasia%20of%20the%20corpus%20callosum%22%20AND%20Diagnosis%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (3)</a></div><h3 class="subhead">Prognosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/29549119">The case for early use of rapid whole-genome sequencing in management of critically ill infants: late diagnosis of Coffin-Siris syndrome in an infant with left congenital diaphragmatic hernia, congenital heart disease, and recurrent infections.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Sweeney NM,
Nahas SA,
Chowdhury S,
Campo MD,
Jones MC,
Dimmock DP,
Kingsmore SF;
RCIGM Investigators</span><br />
<span class="medgenPMjournal">Cold Spring Harb Mol Case Stud</span>
2018 Jun;4(3)
Epub 2018 Jun 1
doi: 10.1101/mcs.a002469.
<span class="bold">PMID: </span><a href="/pubmed/29549119" target="_blank">29549119</a><a href="/pmc/articles/PMC5983173" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Aplasia%2FHypoplasia%20of%20the%20corpus%20callosum%22%20AND%20Prognosis%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (1)</a></div><h3 class="subhead">Clinical prediction guides</h3>
<div class="nl"><a target="_blank" href="/pubmed/29305346">A de novo nonsense mutation in ASXL3 shared by siblings with Bainbridge-Ropers syndrome.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Koboldt DC,
Mihalic Mosher T,
Kelly BJ,
Sites E,
Bartholomew D,
Hickey SE,
McBride K,
Wilson RK,
White P</span><br />
<span class="medgenPMjournal">Cold Spring Harb Mol Case Stud</span>
2018 Jun;4(3)
Epub 2018 Jun 1
doi: 10.1101/mcs.a002410.
<span class="bold">PMID: </span><a href="/pubmed/29305346" target="_blank">29305346</a><a href="/pmc/articles/PMC5983172" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Aplasia%2FHypoplasia%20of%20the%20corpus%20callosum%22%20AND%20Clinical%20prediction%20guides%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (1)</a></div></div>
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<div class="portlet_content ln"><ul><li><a href="/gtr/tests?term=C1861866%5bDISCUI%5d&amp;filter=method%3A2%5F8" target="_blank">Deletion/duplication analysis (38)</a></li>
<li><a href="/gtr/tests?term=C1861866%5bDISCUI%5d&amp;filter=method%3A2%5F7" target="_blank">Sequence analysis of the entire coding region (38)</a></li>
<li class="portletSeeAll portletSeeAllPad"><total><a href="/gtr/tests?term=C1861866%5bDISCUI%5d" target="_blank">See all (38)</a></total></li>
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