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<meta name="keywords" content="C1863557, blepharophimosis - intellectual disability syndrome, sbbys type, blepharophimosis and mental retardation syndrome, say-barber-biesecker-young-simpson type, blepharophimosis, intellectual disability syndrome, say-barber-biesecker-young-simpson type, blepharophimosis-intellectual deficit syndrome, say-barber-biesecker-young-simpson type, blepharophimosis-intellectual deficit syndrome, say-barber/biesecker/young-simpson type, blepharophimosis-intellectual disability syndrome, sbbys type, disease or syndrome, hypothyroidism, dysmorphism, postaxial polydactyly, intellectual disability syndrome, hypothyroidism-dysmorphism-postaxial polydactyly-intellectual disability syndrome, kat6b, mental retardation unusual facies hypothyroidism, ohdo syndrome, say-barber-biesecker variant, ohdo syndrome, say-barber-biesecker-young-simpson variant, ohdo syndrome, sbbys variant, say-barber-biesecker variant of ohdo syndrome, say-barber-biesecker-young-simpson syndrome, say-barber-biesecker-young-simpson variant of ohdo syndrome, sbbys variant of ohdo syndrome, sbbyss, sbbyss syndrome, young simpson syndrome, young-simpson syndrome, yss, 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="KAT6B disorders include genitopatellar syndrome (GPS) and Say-Barber-Biesecker-Young-Simpson variant of Ohdo syndrome (SBBYSS) which are part of a broad phenotypic spectrum with variable expressivity; individuals presenting with a phenotype intermediate between GPS and SBBYSS have been reported. Both phenotypes are characterized by some degree of global developmental delay / intellectual disability; hypotonia; genital abnormalities; and skeletal abnormalities including patellar hypoplasia/agenesis, flexion contractures of the knees and/or hips, and anomalies of the digits, spine, and/or ribs. Congenital heart defects, small bowel malrotation, feeding difficulties, slow growth, cleft palate, hearing loss, and dental anomalies have been observed in individuals with either phenotype." /><meta name="robots" content="index,nofollow,noarchive" />
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<title>Blepharophimosis - intellectual disability syndrome, SBBYS type (Concept Id: C1863557)
- MedGen - NCBI</title>
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<!--
UID=350209
ConceptID=C1863557
-->
<!--imgCountBooks = 1--><div class="ncbi_carousel" data-ncbicarousel-config="imageWidth:'100px',numItemsVisible:2,toggler:false"><div class="nc_header"><span class="img_strip_title">Image</span></div><div class="nc_content"><div class="nc_item"><a class="figpopup"><img alt="Image from GeneReviews" src="/books/NBK114806/bin/kat6b-dis-Image001.gif" src-large="/books/NBK114806/bin/kat6b-dis-Image001.jpg" /></a><br /><a href="/books/NBK114806/figure/kat6b-dis.F1/" title="GeneReviews" target="_blank">details</a></div></div></div><h1 class="medgenTitle"><div class="MedGenTitleText">Blepharophimosis - intellectual disability syndrome, SBBYS type<span class="h1sub">(SBBYSS)</span></div></h1><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>350209</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:">C1863557</span></a></dd><dt><span class="dotprefix"> •</span></dt><dd>Disease or Syndrome</dd></dl></div></div><table class="medgenTable"><tbody><tr><td>Synonyms:</td>
<td>Mental retardation unusual facies hypothyroidism; OHDO SYNDROME, SBBYS VARIANT; Say-Barber-Biesecker Variant of Ohdo Syndrome; Say-Barber-Biesecker-Young-Simpson syndrome; Say-Barber-Biesecker-Young-Simpson variant of Ohdo Syndrome; SBBYSS; Young Simpson syndrome</td></tr>
<tr><td><span class="bold">SNOMED CT: </span></td>
<td>Say-Barber-Biesecker-Young-Simpson syndrome (699298009); Ohdo syndrome, Say-Barber-Biesecker-Young-Simpson variant (699298009); Blepharophimosis-intellectual deficit syndrome, Say-Barber/Biesecker/Young-Simpson type (699298009); Say-Barber-Biesecker-Young-Simpson variant of Ohdo syndrome (699298009); Young-Simpson syndrome (699298009); Hypothyroidism, dysmorphism, postaxial polydactyly, intellectual disability syndrome (699298009); Blepharophimosis, intellectual disability syndrome, Say-Barber-Biesecker-Young-Simpson type (699298009)</td></tr>
<tr><td>Modes of inheritance:</td>
<td>
<div class="divPopper rprt" id="moi_141047"><div><strong>Autosomal dominant inheritance</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>141047</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.">C0443147</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Intellectual Product</dd></dl></div></div></div>
<div class="spaceAbove">Source: Orphanet</div>
<div class="spaceAbove">A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele.</div></div>
<div class="hangingIndent"><a title="click for more information" class="jig-ncbipopper" href="#moi_141047" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Autosomal dominant inheritance</a><span> (Orphanet)</span></div></td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td><a class="help jig-ncbi-popper" data-jig="ncbipopper" href="#target-gene-loc">Gene (location):<img class="pulldown" src="//static.pubmed.gov/portal/portal3rc.fcgi/4223267/img/4204968" /></a><div class="display-none" id="target-gene-loc">
Gene(s) directly associated with<br />
this condition or phenotype.</div></td>
<td><a target="_blank" title="KAT6B - ID: 23522 - NCBI Gene" href="/gene/23522" class="medgenPMinfo">KAT6B</a> (10q22.2)</td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td>Monarch Initiative:</td>
<td><a href="https://monarchinitiative.org/disease/MONDO:0011365" target="_blank">MONDO:0011365</a></td></tr>
<tr><td>OMIM<span class="superscript">®</span>:</td>
<td><a href="https://omim.org/entry/603736" target="_blank">603736</a></td></tr>
<tr><td>Orphanet:</td>
<td><a target="_blank" title="Orphanet: The portal for rare diseases and orphan drugs" href="http://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&amp;Expert=3047">ORPHA3047</a></td></tr></tbody></table></div><div class="rprt-body jig-ncbiinpagenav" data-jigconfig="smoothScroll: false, gotoTopLink: true, gotoTopLinkText: '', gotoTopLinkAttrs: {'title': 'Go to the top of the page'},allHeadingLevels: ['h1'], topOfPageTOC: true, tocId: 'my-toc'"><div id="rprt-tabs-1" class="rprt-tab"><div id="tb-termsProp-1"><div class="leftCol mgCol"><div>
<div class="portlet mgSection" id="ID_101">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Disease_characteristics">Disease characteristics</h1><a sid="101" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><div class="excerpt">Excerpted from the <i>GeneReview: </i><a href="/books/NBK114806" target="_blank">KAT6B Disorders</a></div><div>KAT6B disorders include genitopatellar syndrome (GPS) and Say-Barber-Biesecker-Young-Simpson variant of Ohdo syndrome (SBBYSS) which are part of a broad phenotypic spectrum with variable expressivity; individuals presenting with a phenotype intermediate between GPS and SBBYSS have been reported. Both phenotypes are characterized by some degree of global developmental delay / intellectual disability; hypotonia; genital abnormalities; and skeletal abnormalities including patellar hypoplasia/agenesis, flexion contractures of the knees and/or hips, and anomalies of the digits, spine, and/or ribs. Congenital heart defects, small bowel malrotation, feeding difficulties, slow growth, cleft palate, hearing loss, and dental anomalies have been observed in individuals with either phenotype. [from <a title="GeneReviews" href="https://www.ncbi.nlm.nih.gov/books/NBK1116" class="defSource" target="_blank">GeneReviews</a>]</div><div class="spaceAbove"><strong>Full text of <i>GeneReview</i> (by section):</strong><br /><a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.Summary" target="NBK114806">Summary</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.GeneReview_Scope" target="NBK114806">GeneReview Scope</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.Diagnosis" target="NBK114806">Diagnosis</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.Clinical_Characteristics" target="NBK114806">Clinical Characteristics</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.Genetically_Related_Allelic_Di" target="NBK114806">Genetically Related (Allelic) Disorders</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.Differential_Diagnosis" target="NBK114806">Differential Diagnosis</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.Management" target="NBK114806">Management</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.Genetic_Counseling" target="NBK114806">Genetic Counseling</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.Resources" target="NBK114806">Resources</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.Molecular_Genetics" target="NBK114806">Molecular Genetics</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.References" target="NBK114806">References</a>  |  <a class="medgenPMinfo" href="/books/NBK114806#kat6b-dis.Chapter_Notes" target="NBK114806">Chapter Notes</a></div><div class="spaceAbove"><strong>Authors:</strong><br />
Gabrielle Lemire  |  Philippe M Campeau  |  Brendan H Lee   <a href="/books/NBK114806" target="NBK114806" title="NCBI Bookshelf: KAT6B Disorders">view full author information</a></div></div>
</div>
<div class="portlet mgSection" id="ID_117">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Additional_descriptions">Additional descriptions</h1><a sid="117" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><div class="mgSection"><strong>From OMIM</strong><br />Say-Barber-Biesecker-Young-Simpson syndrome, a variant of Ohdo syndrome (249620), is characterized by distinctive facial appearance with severe blepharophimosis, an immobile mask-like face, a bulbous nasal tip, and a small mouth with a thin upper lip. The condition presents in infancy with severe hypotonia and feeding problems. Associated skeletal problems include joint laxity, abnormally long thumbs and great toes, and dislocated or hypoplastic patellae. Structural cardiac defects are present in around 50% of cases, and dental anomalies, including small and pointed teeth, are common. Many affected individuals have abnormalities of thyroid structure or function. YSS is usually associated with severely impaired intellectual development, delayed motor milestones, and significantly impaired speech (summary by Clayton-Smith et al., 2011).&#13;
Genitopatellar syndrome (606170) is an allelic disorder with overlapping features.  <a target="_blank" href="http://www.omim.org/entry/603736">http://www.omim.org/entry/603736</a></div><div class="mgSection"><strong>From MedlinePlus Genetics</strong><br />The Say-Barber-Biesecker-Young-Simpson (SBBYS) variant of Ohdo syndrome is a rare condition characterized by genital abnormalities in males, missing or underdeveloped kneecaps (patellae), intellectual disability, distinctive facial features, and abnormalities affecting other parts of the body.<br /><br />Males with the SBBYS variant of Ohdo syndrome typically have undescended testes (cryptorchidism). Females with this condition have normal genitalia.<br /><br />Missing or underdeveloped patellae is the most common skeletal abnormality associated with the SBBYS variant of Ohdo syndrome. Affected individuals also have joint stiffness involving the hips, knees, and ankles that can impair movement. Although joints in the lower body are stiff, joints in the arms and upper body may be unusually loose (lax). Many people with this condition have long thumbs and first (big) toes.<br /><br />The SBBYS variant of Ohdo syndrome is also associated with delayed development and intellectual disability, which are often severe. Many affected infants have weak muscle tone (hypotonia) that leads to breathing and feeding difficulties.<br /><br />The SBBYS variant of Ohdo syndrome is characterized by a mask-like, non-expressive face. Additionally, affected individuals may have distinctive facial features such as prominent cheeks, a broad nasal bridge or a nose with a rounded tip, a narrowing of the eye opening (blepharophimosis), droopy eyelids (ptosis), and abnormalities of the tear (lacrimal) glands. About one-third of affected individuals are born with an opening in the roof of the mouth called a cleft palate. The SBBYS variant of Ohdo syndrome can also be associated with heart defects and dental problems.  <a target="_blank" href="https://medlineplus.gov/genetics/condition/ohdo-syndrome-say-barber-biesecker-young-simpson-variant">https://medlineplus.gov/genetics/condition/ohdo-syndrome-say-barber-biesecker-young-simpson-variant</a></div></div>
</div>
<div class="portlet mgSection" id="ID_102">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Clinical_features">Clinical features</h1><a sid="102" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln clinfeat"><strong>From HPO</strong><br />
<div class="divPopper rprt" id="clin_8192"><div><strong>Cryptorchidism</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>8192</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.">C0010417</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Congenital Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Cryptorchidism, or failure of testicular descent, is a common human congenital abnormality with a multifactorial etiology that likely reflects the involvement of endocrine, environmental, and hereditary factors. Cryptorchidism can result in infertility and increases risk for testicular tumors. Testicular descent from abdomen to scrotum occurs in 2 distinct phases: the transabdominal phase and the inguinoscrotal phase (summary by Gorlov et al., 2002).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/8192">Feature record</a> | <a href="/medgen?term=%22Cryptorchidism%22%5BClinical%20Features%5D%20OR%208192%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_163083"><div><strong>Hypospadias</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>163083</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.">C0848558</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Congenital Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Abnormal position of urethral meatus on the ventral penile shaft (underside) characterized by displacement of the urethral meatus from the tip of the glans penis to the ventral surface of the penis, scrotum, or perineum.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/163083">Feature record</a> | <a href="/medgen?term=%22Hypospadias%22%5BClinical%20Features%5D%20OR%20163083%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_322130"><div><strong>Long thumb</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>322130</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.">C1833148</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Length of the thumb is greater than normal.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/322130">Feature record</a> | <a href="/medgen?term=%22Long%20thumb%22%5BClinical%20Features%5D%20OR%20322130%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_400514"><div><strong>Long hallux</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>400514</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.">C1864375</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Increased length of the big toe.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/400514">Feature record</a> | <a href="/medgen?term=%22Long%20hallux%22%5BClinical%20Features%5D%20OR%20400514%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_2880"><div><strong>Primary dilated cardiomyopathy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>2880</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.">C0007193</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Familial dilated cardiomyopathy is a genetic form of heart disease. It occurs when heart (cardiac) muscle becomes thin and weakened in at least one chamber of the heart, causing the open area of the chamber to become enlarged (dilated). As a result, the heart is unable to pump blood as efficiently as usual. To compensate, the heart attempts to increase the amount of blood being pumped through the heart, leading to further thinning and weakening of the cardiac muscle. Over time, this condition results in heart failure.\n\nIt usually takes many years for symptoms of familial dilated cardiomyopathy to cause health problems. They typically begin in mid-adulthood, but can occur at any time from infancy to late adulthood. Signs and symptoms of familial dilated cardiomyopathy can include an irregular heartbeat (arrhythmia), shortness of breath (dyspnea), extreme tiredness (fatigue), fainting episodes (syncope), and swelling of the legs and feet. In some cases, the first sign of the disorder is sudden cardiac death. The severity of the condition varies among affected individuals, even in members of the same family.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/2880">Feature record</a> | <a href="/medgen?term=%22Primary%20dilated%20cardiomyopathy%22%5BClinical%20Features%5D%20OR%202880%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_65429"><div><strong>Feeding difficulties</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>65429</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.">C0232466</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Impaired ability to eat related to problems gathering food and getting ready to suck, chew, or swallow it.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/65429">Feature record</a> | <a href="/medgen?term=%22Feeding%20difficulties%22%5BClinical%20Features%5D%20OR%2065429%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_65980"><div><strong>Low-set ears</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>65980</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.">C0239234</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Congenital Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Upper insertion of the ear to the scalp below an imaginary horizontal line drawn between the inner canthi of the eye and extending posteriorly to the ear.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/65980">Feature record</a> | <a href="/medgen?term=%22Low-set%20ears%22%5BClinical%20Features%5D%20OR%2065980%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_96566"><div><strong>Posteriorly rotated ears</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>96566</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.">C0431478</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Congenital Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">A type of abnormal location of the ears in which the position of the ears is characterized by posterior rotation (the superior part of the ears is rotated towards the back of the head, and the inferior part of the ears towards the front).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/96566">Feature record</a> | <a href="/medgen?term=%22Posteriorly%20rotated%20ears%22%5BClinical%20Features%5D%20OR%2096566%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_235586"><div><strong>Hearing impairment</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>235586</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.">C1384666</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">A decreased magnitude of the sensory perception of sound.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/235586">Feature record</a> | <a href="/medgen?term=%22Hearing%20impairment%22%5BClinical%20Features%5D%20OR%20235586%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_48638"><div><strong>Intellectual disability, severe</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>48638</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.">C0036857</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Mental or Behavioral Dysfunction</dd></dl></div></div></div>
<div class="spaceAbove">Severe mental retardation is defined as an intelligence quotient (IQ) in the range of 20-34.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/48638">Feature record</a> | <a href="/medgen?term=%22Intellectual%20disability%2C%20severe%22%5BClinical%20Features%5D%20OR%2048638%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_381392"><div><strong>Motor delay</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>381392</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.">C1854301</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">A type of Developmental delay characterized by a delay in acquiring motor skills.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/381392">Feature record</a> | <a href="/medgen?term=%22Motor%20delay%22%5BClinical%20Features%5D%20OR%20381392%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_44428"><div><strong>Micrognathia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>44428</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.">C0025990</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Congenital Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Developmental hypoplasia of the mandible.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/44428">Feature record</a> | <a href="/medgen?term=%22Micrognathia%22%5BClinical%20Features%5D%20OR%2044428%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_10133"><div><strong>Hypotonia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>10133</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.">C0026827</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle). Even when relaxed, muscles have a continuous and passive partial contraction which provides some resistance to passive stretching. Hypotonia thus manifests as diminished resistance to passive stretching. Hypotonia is not the same as muscle weakness, although the two conditions can co-exist.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/10133">Feature record</a> | <a href="/medgen?term=%22Hypotonia%22%5BClinical%20Features%5D%20OR%2010133%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_253896"><div><strong>Patellar dislocation</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>253896</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.">C1135812</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Injury or Poisoning</dd></dl></div></div></div>
<div class="spaceAbove">The kneecap normally is located within the groove termed trochlea on the distal femur and can slide up and down in it. Patellar dislocation occurs if the patella fully dislocates out of the groove.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen?term=%22Patellar%20dislocation%22%5BClinical%20Features%5D%20OR%20253896%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_381255"><div><strong>Prominent occiput</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>381255</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.">C1853737</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Increased convexity of the occiput (posterior part of the skull).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/381255">Feature record</a> | <a href="/medgen?term=%22Prominent%20occiput%22%5BClinical%20Features%5D%20OR%20381255%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_1644158"><div><strong>Microcephaly</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1644158</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.">C4551563</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Head circumference below 2 standard deviations below the mean for age and gender.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1644158">Feature record</a> | <a href="/medgen?term=%22Microcephaly%22%5BClinical%20Features%5D%20OR%201644158%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_2670"><div><strong>Blepharophimosis</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>2670</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.">C0005744</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Anatomical Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">A fixed reduction in the vertical distance between the upper and lower eyelids with short palpebral fissures.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/2670">Feature record</a> | <a href="/medgen?term=%22Blepharophimosis%22%5BClinical%20Features%5D%20OR%202670%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_66008"><div><strong>Microdontia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>66008</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.">C0240340</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Congenital Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Decreased size of the teeth, which can be defined as a mesiodistal tooth diameter (width) more than 2 SD below mean. Alternatively, an apparently decreased maximum width of tooth.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/66008">Feature record</a> | <a href="/medgen?term=%22Microdontia%22%5BClinical%20Features%5D%20OR%2066008%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_66013"><div><strong>Bulbous nose</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>66013</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.">C0240543</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Increased volume and globular shape of the anteroinferior aspect of the nose.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/66013">Feature record</a> | <a href="/medgen?term=%22Bulbous%20nose%22%5BClinical%20Features%5D%20OR%2066013%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_224913"><div><strong>Epicanthus inversus</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>224913</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.">C1303003</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">A fold of skin starting at or just below the medial aspect of the lower lid and arching upward to cover, extend in front of and lateral to the medial canthus.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/224913">Feature record</a> | <a href="/medgen?term=%22Epicanthus%20inversus%22%5BClinical%20Features%5D%20OR%20224913%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_373112"><div><strong>Depressed nasal bridge</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>373112</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.">C1836542</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Posterior positioning of the nasal root in relation to the overall facial profile for age.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/373112">Feature record</a> | <a href="/medgen?term=%22Depressed%20nasal%20bridge%22%5BClinical%20Features%5D%20OR%20373112%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_355352"><div><strong>Thin upper lip vermilion</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>355352</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.">C1865017</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Height of the vermilion of the upper lip in the midline more than 2 SD below the mean. Alternatively, an apparently reduced height of the vermilion of the upper lip in the frontal view (subjective).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/355352">Feature record</a> | <a href="/medgen?term=%22Thin%20upper%20lip%20vermilion%22%5BClinical%20Features%5D%20OR%20355352%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_756015"><div><strong>Cleft palate</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>756015</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.">C2981150</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Congenital Abnormality</dd></dl></div></div></div>
<div class="spaceAbove">Cleft palate is a developmental defect of the palate resulting from a failure of fusion of the palatine processes and manifesting as a separation of the roof of the mouth (soft and hard palate).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/756015">Feature record</a> | <a href="/medgen?term=%22Cleft%20palate%22%5BClinical%20Features%5D%20OR%20756015%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_6991"><div><strong>Hypothyroidism</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>6991</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.">C0020676</a></dd><dt><span class="dotprefix"> •</span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Deficiency of thyroid hormone.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/6991">Feature record</a> | <a href="/medgen?term=%22Hypothyroidism%22%5BClinical%20Features%5D%20OR%206991%5Buid%5D">Search on this feature</a></div></div><div class="TreeLite" data-jigconfig="closed: 1"><div class="concept-def"><a class="small" href="#" onclick="jQuery(&quot;.TreeLite&quot;,&quot;#ID_102&quot;).TreeLite().openAll(); return false;">Show all</a><a class="small" href="#" onclick="jQuery(&quot;.TreeLite&quot;,&quot;#ID_102&quot;).TreeLite().closeAll(); return false;">Hide all</a></div><ul><li><span class="TLline">Abnormality of head or neck</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_2670" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Blepharophimosis</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_66013" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Bulbous nose</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_756015" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Cleft palate</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_373112" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Depressed nasal bridge</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_224913" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Epicanthus inversus</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_66008" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Microdontia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_355352" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Thin upper lip vermilion</a></span></li></ul></li><li><span class="TLline">Abnormality of limbs</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_400514" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Long hallux</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_322130" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Long thumb</a></span></li></ul></li><li><span class="TLline">Abnormality of the cardiovascular system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_2880" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Primary dilated cardiomyopathy</a></span></li></ul></li><li><span class="TLline">Abnormality of the digestive system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_65429" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Feeding difficulties</a></span></li></ul></li><li><span class="TLline">Abnormality of the endocrine system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_6991" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hypothyroidism</a></span></li></ul></li><li><span class="TLline">Abnormality of the genitourinary system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_8192" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Cryptorchidism</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_163083" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hypospadias</a></span></li></ul></li><li><span class="TLline">Abnormality of the musculoskeletal system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_10133" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hypotonia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_1644158" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Microcephaly</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_44428" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Micrognathia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_253896" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Patellar dislocation</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_381255" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Prominent occiput</a></span></li></ul></li><li><span class="TLline">Abnormality of the nervous system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_48638" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Intellectual disability, severe</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_381392" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Motor delay</a></span></li></ul></li><li><span class="TLline">Ear malformation</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_235586" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hearing impairment</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_65980" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Low-set ears</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_96566" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Posteriorly rotated ears</a></span></li></ul></li></ul></div></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><li><a href="#tabORDO">Orphanet</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=C1863557[DISCUI]&amp;test_type=Clinical" ref="ncbi_uid=350209">C</a></span><span class="chiclet unavailable round" title="Research Tests">R</span><span class="chiclet Ocolor" title="OMIM"><a ref="ncbi_uid=350209" target="_blank" href="/omim/603736">O</a></span><span class="chiclet Gcolor" title="GeneReviews"><a target="_blank" href="/books/NBK114806/" ref="ncbi_uid=350209">G</a></span><span class="chiclet Vcolor" title="ClinVar"><a target="_blank" href="/clinvar?LinkName=medgen_clinvar&amp;from_uid=350209" ref="ncbi_uid=350209">V</a></span></span><span class="TLline">Blepharophimosis - intellectual disability syndrome, SBBYS type</span></li></ul></div></div></div></div></div><div id="tabMGEN"><div class="ds_tree"><ul><li><span class="TLline"><a href="/medgen/1698793" ref="tree=MeSH" title="MedGen record for Blepharophimosis - intellectual disability syndrome">Blepharophimosis - intellectual disability syndrome</a></span><ul><li><span class="matched_ds">Blepharophimosis - intellectual disability syndrome, SBBYS type</span></li></ul></li></ul></div></div><div id="tabORDO">Follow <a target="_blank" href="http://www.orpha.net/consor/cgi-bin/Disease_Classif.php?lng=EN&amp;data_id=156&amp;PatId=2739&amp;search=Disease_Classif_Simple&amp;new=1" class="ital bold">this link</a> to review classifications for <span class="ital">Blepharophimosis - intellectual disability syndrome, SBBYS type</span> in Orphanet.</div></div></div>
</div>
<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">Etiology</h3>
<div class="nl"><a target="_blank" href="/pubmed/37658610">Clinical heterogeneity of polish patients with KAT6B-related disorder.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Klaniewska M,
Bolanowska-Tyszko A,
Latos-Bielenska A,
Jezela-Stanek A,
Szczaluba K,
Krajewska-Walasek M,
Ciara E,
Pelc M,
Jurkiewicz D,
Stawinski P,
Zubkiewicz-Kucharska A,
Rydzanicz M,
Ploski R,
Smigiel R</span><br />
<span class="medgenPMjournal">Mol Genet Genomic Med</span>
2023 Dec;11(12):e2265.
Epub 2023 Sep 1
doi: 10.1002/mgg3.2265.
<span class="bold">PMID: </span><a href="/pubmed/37658610" target="_blank">37658610</a><a href="/pmc/articles/PMC10724496" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/23436491">De novo mutations of the gene encoding the histone acetyltransferase KAT6B in two patients with Say-Barber/Biesecker/Young-Simpson syndrome.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Szakszon K,
Salpietro C,
Kakar N,
Knegt AC,
Oláh É,
Dallapiccola B,
Borck G</span><br />
<span class="medgenPMjournal">Am J Med Genet A</span>
2013 Apr;161A(4):884-8.
Epub 2013 Feb 22
doi: 10.1002/ajmg.a.35848.
<span class="bold">PMID: </span><a href="/pubmed/23436491" target="_blank">23436491</a></div>
<div class="nl"><a target="_blank" href="/pubmed/16700052">Blepharophimosis-mental retardation (BMR) syndromes: A proposed clinical classification of the so-called Ohdo syndrome, and delineation of two new BMR syndromes, one X-linked and one autosomal recessive.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Verloes A,
Bremond-Gignac D,
Isidor B,
David A,
Baumann C,
Leroy MA,
Stevens R,
Gillerot Y,
Héron D,
Héron B,
Benzacken B,
Lacombe D,
Brunner H,
Bitoun P</span><br />
<span class="medgenPMjournal">Am J Med Genet A</span>
2006 Jun 15;140(12):1285-96.
doi: 10.1002/ajmg.a.31270.
<span class="bold">PMID: </span><a href="/pubmed/16700052" target="_blank">16700052</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Blepharophimosis%20-%20intellectual%20disability%20syndrome%2C%20SBBYS%20type%22%20AND%20Etiology%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">Diagnosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/38178270">De novo KAT6B mutation causes Say-Barber-Biesecker-Young-Simpson variant of Ohdo syndrome in an Iranian boy: a case report.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Davarnia B,
Panahi M,
Rahimi B,
Anari H,
Farajollahi R,
Rodbaneh EA,
Jeddi F</span><br />
<span class="medgenPMjournal">J Med Case Rep</span>
2024 Jan 5;18(1):4.
doi: 10.1186/s13256-023-04237-w.
<span class="bold">PMID: </span><a href="/pubmed/38178270" target="_blank">38178270</a><a href="/pmc/articles/PMC10768154" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/28710305">Autism spectrum disorder in Say-Barber-Biesecker-Young-Simpson syndrome.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Merritt J,
Hart JC,
LeGrow TL</span><br />
<span class="medgenPMjournal">BMJ Case Rep</span>
2017 Jul 14;2017
doi: 10.1136/bcr-2017-219930.
<span class="bold">PMID: </span><a href="/pubmed/28710305" target="_blank">28710305</a><a href="/pmc/articles/PMC5534731" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/23436491">De novo mutations of the gene encoding the histone acetyltransferase KAT6B in two patients with Say-Barber/Biesecker/Young-Simpson syndrome.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Szakszon K,
Salpietro C,
Kakar N,
Knegt AC,
Oláh É,
Dallapiccola B,
Borck G</span><br />
<span class="medgenPMjournal">Am J Med Genet A</span>
2013 Apr;161A(4):884-8.
Epub 2013 Feb 22
doi: 10.1002/ajmg.a.35848.
<span class="bold">PMID: </span><a href="/pubmed/23436491" target="_blank">23436491</a></div>
<div class="nl"><a target="_blank" href="/pubmed/16700052">Blepharophimosis-mental retardation (BMR) syndromes: A proposed clinical classification of the so-called Ohdo syndrome, and delineation of two new BMR syndromes, one X-linked and one autosomal recessive.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Verloes A,
Bremond-Gignac D,
Isidor B,
David A,
Baumann C,
Leroy MA,
Stevens R,
Gillerot Y,
Héron D,
Héron B,
Benzacken B,
Lacombe D,
Brunner H,
Bitoun P</span><br />
<span class="medgenPMjournal">Am J Med Genet A</span>
2006 Jun 15;140(12):1285-96.
doi: 10.1002/ajmg.a.31270.
<span class="bold">PMID: </span><a href="/pubmed/16700052" target="_blank">16700052</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Blepharophimosis%20-%20intellectual%20disability%20syndrome%2C%20SBBYS%20type%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 (4)</a></div><h3 class="subhead">Prognosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/37658610">Clinical heterogeneity of polish patients with KAT6B-related disorder.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Klaniewska M,
Bolanowska-Tyszko A,
Latos-Bielenska A,
Jezela-Stanek A,
Szczaluba K,
Krajewska-Walasek M,
Ciara E,
Pelc M,
Jurkiewicz D,
Stawinski P,
Zubkiewicz-Kucharska A,
Rydzanicz M,
Ploski R,
Smigiel R</span><br />
<span class="medgenPMjournal">Mol Genet Genomic Med</span>
2023 Dec;11(12):e2265.
Epub 2023 Sep 1
doi: 10.1002/mgg3.2265.
<span class="bold">PMID: </span><a href="/pubmed/37658610" target="_blank">37658610</a><a href="/pmc/articles/PMC10724496" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/26334766">A recurrent synonymous KAT6B mutation causes Say-Barber-Biesecker/Young-Simpson syndrome by inducing aberrant splicing.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Yilmaz R,
Beleza-Meireles A,
Price S,
Oliveira R,
Kubisch C,
Clayton-Smith J,
Szakszon K,
Borck G</span><br />
<span class="medgenPMjournal">Am J Med Genet A</span>
2015 Dec;167A(12):3006-10.
Epub 2015 Sep 3
doi: 10.1002/ajmg.a.37343.
<span class="bold">PMID: </span><a href="/pubmed/26334766" target="_blank">26334766</a></div>
<div class="nl"><a target="_blank" href="/pubmed/16700052">Blepharophimosis-mental retardation (BMR) syndromes: A proposed clinical classification of the so-called Ohdo syndrome, and delineation of two new BMR syndromes, one X-linked and one autosomal recessive.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Verloes A,
Bremond-Gignac D,
Isidor B,
David A,
Baumann C,
Leroy MA,
Stevens R,
Gillerot Y,
Héron D,
Héron B,
Benzacken B,
Lacombe D,
Brunner H,
Bitoun P</span><br />
<span class="medgenPMjournal">Am J Med Genet A</span>
2006 Jun 15;140(12):1285-96.
doi: 10.1002/ajmg.a.31270.
<span class="bold">PMID: </span><a href="/pubmed/16700052" target="_blank">16700052</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Blepharophimosis%20-%20intellectual%20disability%20syndrome%2C%20SBBYS%20type%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 (3)</a></div><h3 class="subhead">Clinical prediction guides</h3>
<div class="nl"><a target="_blank" href="/pubmed/38178270">De novo KAT6B mutation causes Say-Barber-Biesecker-Young-Simpson variant of Ohdo syndrome in an Iranian boy: a case report.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Davarnia B,
Panahi M,
Rahimi B,
Anari H,
Farajollahi R,
Rodbaneh EA,
Jeddi F</span><br />
<span class="medgenPMjournal">J Med Case Rep</span>
2024 Jan 5;18(1):4.
doi: 10.1186/s13256-023-04237-w.
<span class="bold">PMID: </span><a href="/pubmed/38178270" target="_blank">38178270</a><a href="/pmc/articles/PMC10768154" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/26334766">A recurrent synonymous KAT6B mutation causes Say-Barber-Biesecker/Young-Simpson syndrome by inducing aberrant splicing.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Yilmaz R,
Beleza-Meireles A,
Price S,
Oliveira R,
Kubisch C,
Clayton-Smith J,
Szakszon K,
Borck G</span><br />
<span class="medgenPMjournal">Am J Med Genet A</span>
2015 Dec;167A(12):3006-10.
Epub 2015 Sep 3
doi: 10.1002/ajmg.a.37343.
<span class="bold">PMID: </span><a href="/pubmed/26334766" target="_blank">26334766</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Blepharophimosis%20-%20intellectual%20disability%20syndrome%2C%20SBBYS%20type%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 (2)</a></div></div>
</div>
</div></div></div></div></div></div></div>
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<div class="supplemental col three_col last">
<h2 class="offscreen_noflow">Supplemental Content</h2>
<div>
<!-- MedGen supplemental column starts here -->
<div class="rightCol mgCol">
<div class="portlet mgSection" id="ID_113">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Table_of_contents">Table of contents</h1><a sid="113" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul id="my-toc"></ul></div>
</div>
<div class="portlet mgSection" id="ID_106">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Genetic_Testing_Registry">Genetic Testing Registry</h1><a sid="106" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="/gtr/tests?term=C1863557%5bDISCUI%5d&amp;filter=method%3A2%5F8" target="_blank">Deletion/duplication analysis (20)</a></li>
<li><a href="/gtr/tests?term=C1863557%5bDISCUI%5d&amp;filter=method%3A2%5F7" target="_blank">Sequence analysis of the entire coding region (22)</a></li>
<li><a href="/gtr/tests?term=C1863557%5bDISCUI%5d&amp;filter=method%3A2%5F19" target="_blank">Targeted variant analysis (4)</a></li>
<li class="portletSeeAll portletSeeAllPad"><total><a href="/gtr/tests?term=C1863557%5bDISCUI%5d" target="_blank">See all (28)</a></total></li>
</ul></div>
</div>
<div class="portlet mgSection" id="ID_119">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Clinical_resources">Clinical resources</h1><a sid="119" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="https://www.omim.org/search?index=entry&amp;start=1&amp;limit=10&amp;sort=score%20desc&amp;field=number&amp;search=603736" target="_blank">OMIM</a></li><li><a href="http://www.orpha.net/consor/cgi-bin/OC_Exp.php?Expert=3047" target="_blank">Orphanet</a></li><li><a href="https://clinicaltrials.gov/search?cond=Blepharophimosis%20-%20intellectual%20disability%20syndrome,%20SBBYS%20type" target="_blank">ClinicalTrials.gov</a></li></ul></div>
</div>
<div class="portlet mgSection" id="ID_115">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Molecular_resources">Molecular resources</h1><a sid="115" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul><li><a href="http://www.omim.org/search?index=entry&amp;start=1&amp;limit=10&amp;sort=score%20desc&amp;field=number&amp;search=605880" target="_blank">OMIM</a></li><li><a href="/clinvar/?term=23522[geneid]" target="_blank">View KAT6B variations in ClinVar</a></li><li><a href="https://catalog.coriell.org/Search?q=603736" target="_blank">Coriell Institute for Medical Research</a></li></ul></div>
</div>
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<p class="address_footer text-white">National Library of Medicine<br />
<a href="https://www.google.com/maps/place/8600+Rockville+Pike,+Bethesda,+MD+20894/@38.9959508,-77.101021,17z/data=!3m1!4b1!4m5!3m4!1s0x89b7c95e25765ddb:0x19156f88b27635b8!8m2!3d38.9959508!4d-77.0988323" class="text-white" target="_blank" rel="noopener noreferrer">8600 Rockville Pike<br />
Bethesda, MD 20894</a></p>
</div>
<div class="col-lg-3 col-12 centered-lg">
<p><a href="https://www.nlm.nih.gov/web_policies.html" class="text-white">Web Policies</a><br />
<a href="https://www.nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office" class="text-white">FOIA</a><br />
<a href="https://www.hhs.gov/vulnerability-disclosure-policy/index.html" class="text-white" id="vdp">HHS Vulnerability Disclosure</a></p>
</div>
<div class="col-lg-3 col-12 centered-lg">
<p><a class="supportLink text-white" href="https://support.nlm.nih.gov/">Help</a><br />
<a href="https://www.nlm.nih.gov/accessibility.html" class="text-white">Accessibility</a><br />
<a href="https://www.nlm.nih.gov/careers/careers.html" class="text-white">Careers</a></p>
</div>
</div>
<div class="row">
<div class="col-lg-12 centered-lg">
<nav class="bottom-links">
<ul class="mt-3">
<li>
<a class="text-white" href="//www.nlm.nih.gov/">NLM</a>
</li>
<li>
<a class="text-white" href="https://www.nih.gov/">NIH</a>
</li>
<li>
<a class="text-white" href="https://www.hhs.gov/">HHS</a>
</li>
<li>
<a class="text-white" href="https://www.usa.gov/">USA.gov</a>
</li>
</ul>
</nav>
</div>
</div>
</div>
</section>
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