The immune cells analyzed include CD8+ T cells, CD4+ T cells, B cells, monocytes, tumor-associated macrophages (TAM), M1 and M2 macrophages, neutrophils, and natural killer (NK) cells, dendritic cells, and besides, different subgroups of T cells, namely T helper 1 (Th1), Th2, Th17, regulatory T (Tregs), and T cell exhaustion. The gene discussed is CD8A; the disease is neoplasm.