KRT7 and breast carcinoma: In addition, the immunohistochemical results showed that the estrogen receptor/progesterone receptor and positive common breast cancer markers such as epithelial membrane antigen (EMA), carcinoembryonic antigen (CEA), cytokeratin 7(CK7), GATA-binding protein 3(GATA3) and Ki-67 were increasingly expressed by more than 40%.