Prognosis is poor for infants with OS, and can be characterized by management of seizures, effects of secondary symptoms and shortened life span (up to 3 years of age). Survivors have severe psychomotor impairments and are dependent on their caretaker for support. Family members of infants with OS may consult with a palliative care team as symptoms may worsen or develop. Death is often due to strain from seizure activity, pneumonia or other complications from motor disabilities. Prospects of recovering from OS after hemispherectomy surgery has been shown to be favorable, with patients experiencing "catch up" in development.
Ohtahara syndrome
Pallister–Killian syndrome
Cohen syndrome
Cohen-Gibson syndrome
Berdon syndrome
Scheie syndrome
Gleich's syndrome
Christianson syndrome