A rare abnormality of the cerebral basilary arterial circle.
D000328:Adult; D001344:Autopsy; D001488:Basilar Artery / Q000002:abnormalities* / Q000196:embryology; D002533:Cerebral Angiography; D006801:Humans; D008297:Male; D014711:Vertebral Artery / Q000002:abnormalities* / Q000196:embryology