FOS and breast cancer: FOS, FOSB, EGR1, ZFP36, CFD, and PPARG were positively correlated with M2 macrophage and CAF infiltration in basal BC, while they were positively correlated with CD8+ T cells, activated NK cells, and CAFs, and negatively correlated with resting NK cells in luminal A type of BC (Figure 8A,D).