肺癌是当今最常见的恶性肿瘤,已成为人类因疾病而死亡的主要原因,其发病隐匿,不易被早期发现,确诊时大多数已属中晚期而丧失手术根治机会;非小细胞肺癌(NSCLC)约占肺癌的75%～80%,中晚期NSCLC主要的治疗手段为化疗[1],但50%以上的患者确诊时年龄超过65岁,老年人各器官系统 Lung cancer is the most common malignant tumor today, which has become the main cause of human death due to illness. The incidence of the disease is not obvious and can not be easily detected in the early stage. Most of the diagnosed lung cancers are already advanced and have lost the chance of surgery. Non-small cell lung cancer (NSCLC) Accounting for about 75% to 80% of lung cancer, the main treatment for advanced NSCLC is chemotherapy [1], but more than 50% of patients diagnosed at the age of over 65 years old, the elderly organ system