I think this is a case of anaplastic ependymoma. Immunohistochemical stains are needed.

 染得好深呀，有没有高倍镜图片。

 不是，血管太多了

 Thank you very much,I'll search for eosinophilic granular bodies and perivascular inflammation on sections carefully

The photos do suggest a case of pleomorphic xanthoastrocytoma. Please search for eosinophilic granular bodies and perivascular inflammation on sections carefully. If both are present the diagnosis is WHO grade II PXA. In addition, mitotic count is very important because very rare cases of PXA behave more aggressively and their only atypical histologic features are increased mitotic activity and focal tumor necrosis. Of course, one important differential diagnosis is giant cell variant of glioblastoma. 

 同意马老师的意见，另做网状纤维染色可协助诊断。

 本例后来询问病史，患者2年前在院外诊断过“胶质瘤”，现为复发，后多切片仔细寻找发现小片栅栏样坏死，诊断为巨细胞胶质母细胞瘤，谢谢各位老师

 学习了

 学习中。。。。。。。