KRT7 and pancreatic ductal adenocarcinoma: On the other hand, CK7, CK19, CEA, CA19-9, and MUC1 are highly sensitive for ordinary pancreatic ductal adenocarcinoma (sensitivity: 96%, 100%, 85%, 75%, and 88%, respectively) [10, 18–21], and CK7, CK19, and MUC1 were partially positive in the current tumor.