The results revealed the infiltration levels of CD4+ T cells, cancer-associated fibroblasts, lymphoid progenitor cells, myeloid progenitor cells, endothelial cells, eosinophils, hematopoietic stem cells, follicular helper T cells, γδ T cells, NK T cells, Treg cells, myeloid-derived suppressor cells (MDSC), neutrophils, monocytes, B cells, DC, macrophages, mast cells, NK cells, and CD8+ T cells in the pan-cancer setting. This evidence concerns the gene CD8A and cancer.