CD8A and neoplasm: Other tumor-associated immune cells are myeloid-derived suppressor cells (MDSCs) [12], a heterogeneous population of myeloid cell precursors that can suppress cytotoxic CD8+ T cell; tumor-associated mast cells (TAMCs), with a controversial immunosuppressive role; and tumor-associated dendritic cells (TADCs), which can inhibit cytotoxic CD8+ T cells by expressing inhibitory molecules and releasing IL-10 and TGF-β [13].