Kleihues P,Burger PC,Scheithauer BW . The new WHO classification of brain tumors .3 .汤钊猷.现代肿瘤学.第2版.上海:上海医科大学出版社,2000:1410 .A population-based study of the incidence and survival rates in patients with pilocytic astrocytoma .Pleomorphic xanthoastrocytoma:w ......