title: Obstructive hydrocephalus secondary to an ectatic basilar artery.
abstract: A 57 year-old white hypertensive male presented with a five-month history of progressive dementia and a clinical picture suggestive of normal pressure hydrocephalus. A CT scan and vertebral angiogram demonstrated an ectatic basilar artery obstructing the posterior third ventricle; the resulting hydrocephalus was relieved by a ventriculo-peritoneal shunt and the patient's symptoms resolved completely.
mesh_terms: D001488:Basilar Artery / Q000000981:diagnostic imaging; D002114:Calcinosis / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D014695:Cerebral Ventriculography; D002557:Cerebrospinal Fluid Shunts; D004108:Dilatation, Pathologic / Q000150:complications / Q000000981:diagnostic imaging; D006801:Humans; D006849:Hydrocephalus / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed