[Four cases of the vertebral artery fenestration (author's transl)].
D000328:Adult; D001488:Basilar Artery / Q000002:abnormalities / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D005260:Female; D006801:Humans; D008297:Male; D014711:Vertebral Artery / Q000002:abnormalities* / Q000000981:diagnostic imaging