[External carotid-basilar anastomosis. Its accidental discovery at the time of head injury].
D000368:Aged; D000792:Angiography; D001488:Basilar Artery / Q000002:abnormalities*; D001930:Brain Injuries / Q000150:complications*; D002339:Carotid Arteries / Q000002:abnormalities*; D006801:Humans; D008297:Male