Tumors of Meningothelial Cells: Meningiomas

Abstract

Meningiomas are usually benign tumors arising from meningeal or arachnoithelial cells. They occur frequently and make up 40–45% of tumors seen in the daily clinical practice. According to biologic behavior, meningioma (with various histologic subtypes) (WHO grade I), atypical meningioma (WHO grade II), and anaplastic meningioma (WHO grade III) are distinguished.