In human BC, the biomarkers of M1‐type TAMs include CD80, CD86, iNOS, human leukocyte antigen‐DRα (HLA‐DRα) and YKL‐40, IL‐1β, IL‐6, IL‐12, TNFα, and main biomarkers of M2‐type TAMs are CD206, CD163, CD204, stabilin‐1, folate receptor beta (FRβ), arginase‐1 (Arg‐1), YKL‐39, IL‐4, IL‐10, IL‐13, CCL2, CCL18, TGFβ, and VEGF.26, 27, 36, 44, 46, 47, 48, 49, 50, 51, 52. The gene discussed is CCL2; the disease is breast cancer.