CD4 and cancer: The results showed the correlations between CDKN2A expression and different infiltration levels of CD4+ T cells, CAF, progenitors, NK T cells, Tregs, B cells, Endo, Eos, HSC, Tfh, γ/δT, neutrophils, monocytes, macrophages, dendritic cells, NK cells, Mast cells and CD8+ T cells in pan-cancer (Figure 4).