The results showed the infiltration levels of CD4+ T cells, CAF, progenitors of lymphoid, progenitors of myeloid, progenitors of monocytes, Endo, Eos, HSC, Tfh, γ/δ T cells, NKT cells, Tregs, B cells, neutrophils, monocytes, macrophages, dendritic cells, NK cells, mast cells and CD8+ T cells in pan‐cancer tissues. The gene discussed is CD8A; the disease is cancer.