| A rare malformation syndrome characterized by global developmental delay with intellectual disability, speech delay, hypotonia, neurobehavioral symptoms including autism spectrum disorder, repetitive behaviors, attention deficit hyperactivity disorder, and sleep abnormalities. Dysmorphic facial features may include microcephaly (or sometimes macrocephaly), a round face, a flat head with a shortened forehead, hypertelorism, upslanted palpebral fissures, bulbous nose, wide nasal bridge, short philtrum, tented upper lip, and dental abnormalities (most commonly retained primary teeth). Additional clinical features can include recurrent infections, cyclic vomiting syndrome, seizures, and nonspecific congenital malformations. |
