- Overexpression or ectopic expression of MUC2 is the common property of mucinous carcinomas of the colon, pancreas, breast, and ovary. Hanski, C., Hofmeier, M., Schmitt-Gräff, A., Riede, E., Hanski, M.L., Borchard, F., Sieber, E., Niedobitek, F., Foss, H.D., Stein, H., Riecken, E.O. J. Pathol. (1997)