Secondarytumors of the central nervous system (CNS) can have particularly devastating consequences and have been linked to prior treatment for childhood leukemia and brain tumors.
中枢神经系统二次肿瘤后果特别严重，与儿童白血病及脑瘤治疗有关。
2
Head trauma, central nervous system infections and tumors are associated with secondary epilepsy.
头部外伤、中枢神经系统感染和肿瘤与继发性癫痫有关。
3
Secondary malignant tumors can occur by hematogenous spread or direct invasion.