Appropriate surgical approach and exposure , elaborate operation and adequate postoperative drainage are very important for total resection of the tumor and improvement of clinical outcomes 侧脑室三角区脑膜瘤手术难度大，合理的手术入路、精细的手术操作与良好的术后引流是全切肿瘤、提高疗效的重要因素。
Hemorrhage into neoplasm occurs in choreocarcinoma , melanoma , renal cell , bronchogenic carcinoma , pituitary adenoma , glioblastoma multiforme and medulloblastoma . these tumors may present as hemorrhage 当脑膜瘤，肺癌，垂体腺瘤，恶性胶质瘤，髓母细胞瘤等肿瘤发生出血时，从影像上可能会将肿瘤误认为出血。
The results were as follows : 1 case of acoustic neuroma , 1 case of cerebello - pontine lymphoma , 1 case of meningioma of the cerebello - pontine angle , 2 cases of stroke in the pons , and 1 case of dolichoectasia of the verterbro - basilar artery 结果计有：听神经瘤1例、小脑及桥脑淋巴瘤1例、小脑桥脑角脑膜瘤1例、桥脑中风2例、及椎骨基底动脉血管瘤1例。
Methods : a retrospective analysis of 43 cases underwent aecepted stereotactic radiotherapy after operation or stereotactic radiotherapy poste operation followed with operation and operation after stereotactic radiotherapy were performed 方法：回顾性分析了43例颅底脑膜瘤手术加立体定向放射治疗和手术加立体定向放射治疗再加手术治疗以及立体定向放射治疗后再行手术的临床资料。
