[Occlusion of the circle of Willis presenting rich collateral circulation].
D000293:Adolescent; D000328:Adult; D002533:Cerebral Angiography; D002539:Cerebral Arterial Diseases / Q000175:diagnosis*; D002648:Child; D002941:Circle of Willis / Q000002:abnormalities*; D003097:Collateral Circulation; D005260:Female; D006801:Humans; D008297:Male