41. 下列哪一個中樞神經系統腫瘤的預後最好? (A) diffuse astrocytoma (B) pilocytic astrocytoma (C) medulloblastoma (D) oligodendroglioma

1. Malignant tumors are characterized by the following findings, except (A) Tumors remain localized, will not spread to other sites, and are amenable to local surgical removal (B) Tumors can invade and destroy adjacent structures and spread to distant sites (metastasize) to cause death (C) Lack of differentiation (D) Pleomorphism (E) Mitoses