例1女,50岁。双小腿间断发作性抽搐1个月。体检:神经系统无阳性发现。MRI检查显示病变位于双侧额顶部交界区上矢状窦旁,呈等T1、等T2信号,边界清楚,信号均匀。增强后病灶明显均匀强化,邻近硬脑膜增厚(图1A~D)。术前诊断为脑膜瘤。行后正中入路椎管内肿瘤切除术,见病变侵犯双额顶硬脑膜下及上矢状窦,灰白色,血供中等,实性、质硬韧,与脑膜粘连紧密,大小约2.5 cm×2.0 cm Example 1 Female, 50 years old. Two-leg intermittent episodes of seizures 1 month. Physical examination: No positive neurological findings. MRI examination showed that the lesion was located beside the sagittal sinus at the top of the bilateral frontal area with equal T1 and equal T2 signals with a clear boundary and uniform signal. After the enhancement of the lesion was significantly enhanced, adjacent to the dural thickening (Figure 1A ~ D). Preoperative diagnosis of meningioma. After the median approach spinal canal tumor resection, see the lesions infringe the double top of the subdural and superior sagittal sinus, gray, blood for the medium, solid, hard and tough, and the adhesion of the meninges, the size of about 2.5 cm 2.0 cm