FOLR2 and breast cancer: 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