MUC17 and small intestine cancer: Aberrant expression of MUC3, MUC4, MUC5AC and MUC6 is found in pancreatic intraepithelial neoplasia [13], [14], and MUC16 and MUC17 are expressed in pancreatobiliary and small intestinal cancers [15]–[17] and have high prognostic value [15], [17]–[19].