" /> C syndrome - CISMeF





Preferred Label : C syndrome;

Type : Phenotype, molecular basis known;

Alternative titles and symbols : Opitz trigonocephaly syndrome; Trigonocephaly syndrome;

Description : The C syndrome, also known as Opitz trigonocephaly syndrome, is a malformation syndrome characterized by trigonocephaly, severe mental retardation, hypotonia, variable cardiac defects, redundant skin, and dysmorphic facial features, including upslanted palpebral fissures, epicanthal folds, depressed nasal bridge, and low-set, posteriorly rotated ears (summary by Kaname et al., 2007). C syndrome shows phenotypic overlap with Bohring-Opitz syndrome, or C-like syndrome (605039), a disorder with more severe features than C syndrome, caused by heterozygous mutation in the ASXL1 gene (612990) on chromosome 20q11.;

Inheritance : Autosomal dominant;

Molecular basis : Caused by mutation in the CD96 gene (CD96, 606037.0001);

Prefixed ID : #211750;

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03/05/2025


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