But chemical treatment for brain cancer is complex because of the protective blood-brain barrier. 但是脑癌的化疗方法很复杂，因为其受保护的大脑血液的关卡。
In the absence of a clinical trial adjuvant chemotherapy and radiation therapy may be considered on an individual basis. 对于那些未进行临床试验的患者，放疗联合化疗的给予要按照个体化原则来进行。
