Suprasellar arachnoid cyst presenting with bobble-head doll syndrome: Report of three cases.

Suprasellar arachnoid cysts can have varied presentations with signs and symptoms of obstructive hydrocephalus, visual impairment, endocrinal dysfunction, gait ataxia and rarely bobble-head doll movement. The bobble-head doll movement is a rare movement disorder characterized by antero-posterior bobbling of the head and neck on the trunk every 2-3 seconds. We present three cases with bobble-head doll syndrome associated with a large suprasellar arachnoid cyst and obstructive hydrocephalus, which were treated with endoscopic cystoventriculocisternostomy and marsupialization of the cyst.