PIP and breast cancer: In addition, multiple studies have confirmed that the positive rate of mammaglobin and GCDFP15 in breast cancer is much lower than that of TRPS1 and GATA3, especially in TNBC and basal-like breast carcinoma (the positive rates of mammaglobin and GCDFP15 are lower <35% and 16% in TNBC; 21.4% and 11.9% in basal-like carcinoma, respectively).