MUC5AC and neoplasm: Tumor immunohistochemical analyses were presented as follows: Inhibin-α (-), ER (-), Vimentin (mesenchyme +), CK7 (+), CK19 (+), CK20 (−), CEA (−), MUC-1 (+) (Fig. 7), MUC-5AC (+) (Fig. 8), MUC-6 (+) (Fig. 9), MUC-2 (−), S-100p (focal+), and Ki-67 (12% +).