<prompt> True about meningioms -More common in men50 are malignant95 cure rate following treatmentArise from arachnoid layer  <response>: Ans. is c i.e., 95 cure rate following treatment Meningiomas o Meningiomas are tumors that arise from the dura mater and are composed of neoplastic arachnoid cap cells. o They are now the most common primary brain tumor, accounting for approximately 32 of the total. this information has been added in 18the of Harrison. o They tend to be more common in women and in patients with Neurofibromatosis type-2. o Meningiomas are classified by the WHO into three histological grades of increasing aggressiveness: grade I or benign; grade II or atypical and grade III or malignantanaplastic. This information has been added in 18the of Harrison. o Total surgical resection of benign meningiomas is curative. Tumors that cannot be resected ; may benefit from treatment with external beam radiotherapy or stereotactic surgery. 