[2 cases with enlarged anterior spinal artery as the result of intracranial collateral circulation].
D000328:Adult; D000368:Aged; D002560:Cerebrovascular Circulation; D003097:Collateral Circulation; D005260:Female; D006801:Humans; D008297:Male; D011859:Radiography; D014711:Vertebral Artery / Q000000981:diagnostic imaging*