title: Agenesis of the internal carotid artery with an unusual primitive collateral. Case report.
mesh_terms: D000328:Adult; D002339:Carotid Arteries / Q000002:abnormalities*; D002343:Carotid Artery, Internal / Q000002:abnormalities; D002533:Cerebral Angiography; D003097:Collateral Circulation; D006801:Humans; D008297:Male