Acute traumatic subdural hematoma originating from a convexity meningioma--case report.

A 68-year-old male presented with a traumatic subdural hematoma originating from a convexity meningioma the day after a motorcycle accident. Computed tomography disclosed a right temporal subdural and/or epidural mass. Emergent craniotomy revealed a convexity meningioma with thin subdural hematoma. The underlying brain was apparently healthy. The histological diagnosis was angiomatous meningioma with hemorrhagic foci. The operative and histological findings indicated that the tumoral tissue was the source of the subdural hematoma.