Persistent primitive trigeminal artery (carotid-basilar anastomosis).
D000328:Adult; D001488:Basilar Artery / Q000002:abnormalities*; D002339:Carotid Arteries / Q000002:abnormalities*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged