CD8A and breast cancer: Specifically, Plasma_cells, T_cells_CD8, T_cells_follicular_helper, T_cells_regulatory_(Tregs), NK_cells_resting, NK_cells_activated, Macrophages_M0, Macrophages_M1, Dendritic_cells_resting, Dendritic_cells_activated, Mast_cells_resting, Mast_cells_activated and Neutrophils exhibited significant differences in immune infiltration abundance among the four breast cancer subtypes (Fig. 4C).