CD4 and neoplasm: In addition, the correlation analysis highlighted 14 tumor‐infiltrating immune cells associated with PLK1 expression in BRCA (Figure 4A), with six (Tregs, resting NK cells, activated memory CD4+ T cells, follicular helper T cells [Tfh], M0 macrophages, and M1 macrophages) showing enhanced tumor infiltration and eight (naive B cells, plasma cells, resting memory CD4+ T cells, gammadelta T cells, monocytes, resting dendritic cells, M2 macrophages, and resting mast cells) exhibiting diminished infiltration.