KRT7 and neoplasm: Immunohistochemical staining showed that the tumor cells were positive for CKAE1/AE3, CK8/18, CK7, 34βE12, and GATA-3 (Figures 3A–C), while negative for p63 (Figure 3D), Vimentin, MUC5AC, MUC6, Hep-1, AFP, CK20, CDX2, MUC2, CD10, CK5/6, CD56, Syn, and CgA.