随着肿瘤发病率的上升,生存期的延长,肿瘤患者发生医院感染日趋增多,成为医院感染的高危人群。在不同系统疾病医院感染所造成的经济损失中,肿瘤位居第二[1]。医院感染不仅增加了住院费用,亦成为晚期肿瘤患者常见的并发症及死亡原因[2、3]。现将其常见发生原因、临床特点及预防? With the rising incidence of cancer, prolongation of survival, the incidence of nosocomial infections in cancer patients is increasing, becoming a high risk of nosocomial infection. Among the economic losses caused by nosocomial infections of various system diseases, the tumor ranks second [1]. Hospital infection not only increased the cost of hospitalization, has also become a common complication of cancer patients and causes of death [2,3]. Now its common causes, clinical features and prevention?