A fifty-five-year-old woman with a history of migraine suddenly developed an occipital headache and visual disturbance after a typical migrainous attack. On admission, she had a left homonymous hemianopsia, and computed tomography of the brain demonstrated intracranial hematomas in the occipital subcortices bilaterally. Cerebral arteriography revealed diffuse vasospasm of the intracranial arteries attributed to the migraine. The cystatin C concentration in the cerebrospinal fluid was low, which suggested the existence of cerebral amyloid angiopathy. According to the clinical course and angiographic findings, it is suggested that the vasospasm associated with migraine played an important role in developing multiple brain hemorrhage in this patient.
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