[Lymphoplasmacyte-rich meningioma: a report of three cases and a review of the literature].

We report three patients (a 36-year-old man, a 41-year-old woman, and a 22-year-old man) with lymphoplasmacyte-rich meningioma who manifested characteristics on radiological and blood examinations. Two were hospitalized with gradual deterioration of hemiparesis and one with general convulsive seizure. Radiological examination revealed typical meningiomas of convexity in two and that of falx in one. Two of the patients showed large perifocal edema. Anemia was found in one patient and an elevated level in the zinc sulfate turbidity test was noted in all cases. Abnormal findings in laboratory examination improved quickly, whereas perifocal edema remained for six months after tumor removal. The tumors were histologically confirmed to be meningioma with massive infiltrates of plasma cells and lymphocytes. Seventeen cases of lymphoplasmacyte-rich meningioma that have been reported to date including our three cases were reviewed.