Occlusion of all four extracranial vessels with minimal clinical symptomatology. Case report.
D001766:Blindness / Q000209:etiology*; D016122:Brachiocephalic Trunk; D002340:Carotid Artery Diseases / Q000150:complications*; D002342:Carotid Artery, External; D002343:Carotid Artery, Internal; D002533:Cerebral Angiography; D003097:Collateral Circulation; D006801:Humans; D002537:Intracranial Arteriosclerosis / Q000150:complications*; D002546:Ischemic Attack, Transient / Q000150:complications; D008297:Male; D008875:Middle Aged; D013348:Subclavian Artery; D014711:Vertebral Artery