This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'True about meningiomas - \nSelect and explain. \nA. More common in men, B. 50% are malignant, C. 95% cure rate following treatment, D. Arise from arachnoid layer', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Meningiomas are tumors that arise from the dura mater and are composed of neoplastic (arachnoid cap ) cells.\nThey are now the most common primary brain tumor, accounting for approximately 32% of the total .\xa0(this information has been added in 18th/e of Harrison).\nThey tend to be more common in women and in patients with Neurofibromatosis type-2.\nMeningiomas are classified by the WHO into three histological grades of increasing aggressiveness: grade I or benign; grade\xa0II\xa0or atypical and grade III or malignant/anaplastic.( This information has been added in\xa018th/e of Harrison).\nTotal surgical resection of benign meningiomas is curative. Tumors that cannot be resected ; may benefit from treatment with external beam radiotherapy or stereotactic surgery.', 'role': 'assistant'}]