Autosomal dominant intellectual disability-craniofacial dysmorphism-macrocephaly-hypotonia syndrome due to H1-4 mutation

Definition

A rare multiple congenital anomalies/dysmorphic syndrome characterized by mild to severe intellectual disability frequently co-occuring with behavioral problems (including anxiety, attention deficit hyperactivity disorder and autistic spectrum disorder), variable somatic overgrowth, macrocephaly and distinctive dysmorphic facial features including high hairline, frontal bossing, downslanting palpebral fissures, telecanthus, hypertelorism, deep-set eyes and full cheeks. Pierre Robin sequence with submucous cleft has also been reported. Additional clinical features include skeletal abnormalities, hypotonia, cardiac anomalies, hypothyroidism, cryptorchidism, visual disturbances and ectodermal problems such as sparse hair, thin nails, and abnormal dentition.