随着肿瘤化放疗技术的进步及患者生存期延长、器官移植的发展、艾滋病病毒 (HIV)感染和艾滋病 (AIDS)的出现 ,近年来免疫受损 (ICH)患者明显增加。肺是免疫受损患者最为常见的感染靶器官。因此 ,ICH并发肺部感染是目前临床所面临的一大挑战和难题 ,探讨其诊断思路显得尤为必要 With the advancement of tumorized radiotherapy and the prolongation of patient survival, the development of organ transplantation, the emergence of HIV and AIDS, the number of patients with immune compromise (ICH) has been significantly increased in recent years. Lung is the most common target organ for infection in immunocompromised patients. Therefore, ICH concurrent pulmonary infection is currently a major clinical challenge and challenges, to explore its diagnostic thinking is particularly necessary