MULTIPLE GROWTHS OF PRIMARY CALVARIAL MENINGIOMAS

The authors present the case of a 68-year-old woman with multiple growths of primary calvarial meningiomas. Histological examination revealed one tumor arising in the left parietal bone that showed some malignant aspects, including hypercellularity, cellular pleomorphism, necrotic foci, and some mitoses; the tumor partially had a meningotheliomatous pattern. Two other tumors in the right parietal bone were meningotheliomatous meningiomas without any malignant features. With a review of the literature, the pathogenesis of the multiplicity is discussed.