Additionally, the high CTSG expression rate of HIV-related LUAD was 74.19%, and the high expression rate of HIV-related LUSC was 10%, and the high CTSG expression rate of different pathologic type of HIV-related lung cancer was compared by using χ2 test, which shows that there is a difference in the CTSG expression of different pathologic types (P<0.05) (Table 2). Here, CTSG is linked to lung carcinoma.