肺癌是最常见的恶性肿瘤之一,随着肿瘤综合治疗水平的提高,肺癌患者生存期显著延长。但是,由于肿瘤本身及肿瘤治疗都会导致患者机体免疫功能下降,使得呼吸道感染特别是肺部感染的发生率明显上升,而且往往难以控制。目前,肺部感染已成为晚期肺癌最常见的合并症和主要的死亡原因 Lung cancer is one of the most common malignant tumors, with the improvement of the comprehensive treatment of cancer, lung cancer patients significantly prolonged survival. However, as the tumor itself and tumor treatment can lead to the reduction of immune function in the patient’s body, the incidence of respiratory infections, especially lung infections, is significantly increased and often difficult to control. At present, lung infections have become the most common comorbidities and major causes of death in advanced lung cancer