所有患者术前均进行了CT和MRI检查，2 0例患者同时进行了DSA检查，16例患者术前进行了肿瘤供血动脉的栓塞治疗，5例患者术前行侧脑室腹腔分流术。

Preoperative examinations included CT and MRI in all patients, DSA in 20, preoperative embolization of feeding arteries of tumor in 16, a preoperative ventriculoperitoneal shunt was placed in 5 cases.

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