Occlusion of the middle cerebral artery with the formation of an abnormal arterial collateral system--moyamoya type--23 months later.
D002533:Cerebral Angiography; D002536:Cerebral Arteries; D002561:Cerebrovascular Disorders / Q000000981:diagnostic imaging* / Q000209:etiology; D003097:Collateral Circulation; D003250:Constriction; D005260:Female; D006801:Humans; D007564:Japan; D008875:Middle Aged; D013577:Syndrome