According to the results of the univariate Cox hazard model, eosinophils (p = 0.015), resting dendritic cells (p < 0.0001), gamma-delta T cells (p < 0.0001), resting and activated CD4+ T cells (p < 0.0001; p = 0.0005), resting mast cells (p < 0.0001), M0 and M1 macrophages (p < 0.0001; p = 0.004), memory B cells (p = 0.013), activated NK cells (p < 0.0001), monocytes (p < 0.0001), and regulatory T cells (p < 0.0001) were significantly related to OS in BC patients. The gene discussed is CD4; the disease is breast cancer.