Posterior fossa subarachnoid cyst due to choroid plexus papilloma.
D001099:Arachnoid; D002551:Cerebral Ventricle Neoplasms / Q000150:complications*; D014695:Cerebral Ventriculography; D002831:Choroid Plexus; D003560:Cysts / Q000209:etiology*; D004806:Ependymoma / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged