[A case of malignant meningioma with subcutaneous infiltration of the scalp].

A case of malignant meningioma in a 78-year-old man is reported. It was found as a subcutaneous tumor of the scalp, following which some neurological symptoms were clinically noted. The tumor showed infiltrative growth and was located from the subcutaneous tissue to the meninges through the skull. Histologically, it was composed predominantly of spindle, epithelioid and bizarre tumor cells, but a whorl formation was also detected in a restricted area. The histogenesis of the present case and the relationship between the histopathological findings and clinical behavior of malignant meningioma are also discussed.