The results showed that CCDC69 expression in BC tissues positively correlated with marker genes expression from B cell (r = 0.61, P = 1.1e-111), CD8+ cell (r = 0.64, P = 1.4e-126), TAMs (r = 0.51, P = 1.7e-74), neutrophil (r = 0.64, P = 2.5e-128) and dendritic cell (r = 0.6, P = 2.1e-106) (Figures 7A–E). This evidence concerns the gene CD8A and breast cancer.