CD8A and neoplasm: To investigate the differences in the tumor immune microenvironment between the high- and low-risk groups in the RS, in light of the estimation results of the proportion of infiltrating immune cells, we discovered that 5 of the 28 immune cells, including activated CD4+ T cells, activated CD8+ T cells, effector memory CD8+ T cells, immature B cells, and type 2 T helper cells, were significantly greater in the low-RS group than in the high-RS group according to the ssGSEA algorithm (Figures 9A–E).