CK syndrome

CK syndrome (CKS) is a recently described X-linked recessive disorder that affects males. It is characterized by mild to severe cognitive impairment, seizures beginning in infancy, microcephaly, cerebral cortical malformations, and a thin body habitus. Distinctive features include down slanting palpebral fissures, a high nasal bridge, a high arched palate, micrognathia, and short stature. Patients also have behavior problems, including aggression, attention deficit hyperactivity disorder, and irritability. Some have scoliosis and kyphosis. CK syndrome is caused by mutations in NSDHL, a gene that encodes an enzyme in the cholesterol biosynthesis pathway.