| A rare genetic syndromic intellectual disability characterized by global developmental delay and speech delay, variable degrees of intellectual disability, and dysmorphic facial features (such as frontal bossing, epicanthal folds, strabismus, depressed nasal bridge, short philtrum, auricular abnormalities, micrognathia, or crowded teeth, among others). Additional reported manifestations are behavioral problems (stereotypies, aggression, anxiety, autism spectrum disorder), skeletal anomalies (scoliosis, pectus carinatum, clinodactyly of fingers and toes, among others), and seizures. The disorder is autosomal dominant and whilst most cases arise sporadically, parental mosaicism is not exceptional. Caused by haploinsufficiency of the SOX5 gene (12p12.1) due to either a 12p12.1 microdeletion encompassing the gene or heterozygous point variants. |
