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.