In the analysis of the TCGA dataset, we also found that the expression of IL17A and CD8A was significantly positively correlated (P < 0.001) (Fig. 1c), and the tumor infiltration of CD8+ T cells was significantly higher in tumors with high expression of IL17A than that of IL17A with low expression (P < 0.001) (Fig. S1d). Here, IL17A is linked to neoplasm.