Prognostic analysis of immune cell infiltration in ccRCC patients revealed that infiltration of resting CD4 memory T cells and resting mast cells was positively correlated with overall survival, whereas infiltration of follicular helper T cells, Tregs, and activated mast cells was negatively correlated with survival (Fig. 9B–F). This evidence concerns the gene CD4 and nonpapillary renal cell carcinoma.