Whorling-sclerosing meningioma invading skull bone and subcutaneous tissue with an incidental toxoplasmosis: A case report.

Whorling-sclerosing meningioma (WSM) is a rare type of meningothelial tumor. Worldwide, only 31 cases have been reported. The diagnosis of this rare meningioma subtype is based principally on microscopic findings, wherein up to 70% of the tumor tissue should be formed by thick whorls of collagen.