Notably, NUDT1 expression was positively and remarkably linked with the infiltrating levels of regulatory T cells (Tregs), CD8+ T cells, follicular helper T cells, and M0 macrophages, but negatively linked with the infiltrating levels of M1 macrophages, M2 macrophages, resting mast cells, resting memory CD4+ T cells, and monocytes in ccRCC (Figure 7(b)–7(j)). Here, CD4 is linked to nonpapillary renal cell carcinoma.