title: Proatlantal intersegmental artery with absence of bilateral vertebral arteries. Case report.
abstract: A case of proatlantal intersegmental artery with absence of bilateral vertebral arteries is presented. This rare anomaly was accidentally encountered on angiography in a patient with a ruptured aneurysm of the anterior communicating artery.
mesh_terms: D002536:Cerebral Arteries / Q000002:abnormalities*; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011859:Radiography; D014711:Vertebral Artery / Q000002:abnormalities*