The positive rate of the MUC5AC in mucinous carcinoma (intestinal type), villous tubular adenocarcinoma, endometrioid adenocarcinoma, clear cell carcinoma, serous carcinoma, adenosquamous carcinoma and invasive stratified mucin-producing carcinoma (iSMILE) was 100, 66.67, 75, 100, 100, 50, and 100%, respectively. Here, MUC5AC is linked to serous adenocarcinoma.