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Intracranial aneurysm associated with cerebrovascular moyamoya disease. Report of a case and review of 13 cases.

Recently interest has increased in cerebrovascular moyamoya disease (Suzuki and Takaku, 1979; Krayenbuhl, 1975), spontaneous occlusion of the circle of Willis (Kudo, 1975) or cerebral basal rete mirable (Nishimoto and Takeuchi, 1968). Kodama and Suzuki (1978) have reported five aneurysms in 35 adults with this condition, suggesting a high incidence and a specific location of the aneurysm in moyamoya disease. A case of basilar artery aneurysm associated with this disease and a review of 13 aneurysm-associated cases reported up to now in Japan constitute this report. A 54-year-old woman was admitted soon after an episode of subarachnoid haemorrhage on May 2, 1977. Physical examination disclosed no neurological deficit but there was meningeal irritation and lumbar puncture showed bloody CSF.