室管膜瘤起源于脑室系统室管膜细胞及其下的胶质上皮细胞,占颅内肿瘤1.2%～3.5%,占成人脑肿瘤的不到3%,占儿童颅内肿瘤的8%～10%。自1994年2月到2005年3月,我院X刀治疗了12个手术残余的室管膜瘤病人(表1),现回顾性总结如下。1对象与方法全组12例,均在我院X刀中心采用直线加速器立体定向放射外科治疗(SRS)。根据2000年WHO肿瘤组织学分类,室管膜瘤6例,间变型室管膜瘤4例,粘液乳头型室管膜瘤1例,室管膜下瘤1例。按恶性程度分级,Ⅲ级4 Ependymoma originated in the ventricular system ependymal cells and glial epithelial cells, accounting for 1.2% to 3.5% of intracranial tumors, accounting for less than 3% of adult brain tumors, accounting for 8% of children with intracranial tumors 10%. From February 1994 to March 2005, X-knife treatment of 12 patients with residual ependymoma patients (Table 1), are retrospectively summarized as follows. 1 objects and methods The whole group of 12 cases, are in our hospital X knife center linear accelerator stereotactic radiosurgery (SRS). According to the WHO classification of tumor histology in 2000, 6 ependymomas, 4 ependymoma, 1 mucinous papilloid ependymoma and 1 subependymoma. Graded according to the degree of malignancy, Ⅲ grade 4