本病例术前CT诊断为前颅凹脑膜瘤；MRI诊断为前额部占位，胶质瘤可能性大。手术所见：肿瘤位于双额叶内侧，前缘为脑表面，下至颅底及鞍上，后至三脑室前部，颅底骨质及脑膜未见破坏，大小约８cm×７cm×６cm，内侧与大脑组织分界清，大脑镰被侵袭破坏，脑膜色灰白及暗红色，内 The cases of preoperative CT diagnosis of anterior cranio-concave meningioma; MRI diagnosis of forehead space occupancy, the possibility of glioma. Surgical findings: The tumor is located inside the double frontal, the front edge of the brain surface, down to the skull base and saddle, to the front of the third ventricle, skull base and meningeal destruction, about the size of 8cm × 7cm × 6cm, The medial and the brain tissue demarcation clear, the falx is damaged by attack, the brain color gray and dark red, inner