CD8A and neoplasm: Interestingly, there was no significant correlation with tumor purity (r = -0.045, P = 3.77e-01) and the level of infiltrating B cells (r = -0.09, P = 8.42e-02) but significant positive correlations with the levels of infiltrating CD8+ T cells (r = 0.25, P = 1.13e-06), CD4+ T cells (r = 0.477, P =3.63e-22), macrophages (r = 0.638, P = 1.12e-43), neutrophils (r = 0.218, P = 2.30e-05), and DCs (r = 0.443, P = 2.68e-19) in STAD (Figure 4C).