脑转移瘤是颅内常见恶性肿瘤之一 ,其原发病灶可位于全身各处 ,但最多见于肺部。肺癌脑转移瘤的自然病程仅为 3～4个月 ,但个别病人经治疗后生存期可达 5年以上。影响肺癌脑转移瘤患者预后的因素很多。本人对 312例患者的生存相关因素进行了分析。报道如下。材料与方法　 (1)对 Metastatic brain tumor is one of the common intracranial malignancies, the primary lesion can be located throughout the body, but most found in the lungs. The natural course of brain metastases of lung cancer is only 3 to 4 months, but the survival of individual patients after treatment up to 5 years. Factors affecting the prognosis of patients with lung cancer brain metastases are many. I analyzed the life-related factors of 312 patients. Reported as follows. Materials and methods (1) Yes