1.   Sclerosing cholangitis and biliary tract calculi - primary or secondary?

2.   Sclerosing cholangitis and biliary tract calculi -- primary or secondary?

3.   By conventional criteria, it is excluded by the presence of biliary tract calculi, a history of previous biliary tract surgery, and the presence of a cholangiocarcinoma.

4.   Despite these criteria, patients with biliary tract calculi have been included in several studies of primary sclerosing cholangitis.

5.   We have also encountered a number of patients with the radiological features of sclerosing cholangitis but in whom there were also biliary tract calculi.

6.   The findings of this study show that a number of patients with sclerosing cholangitis also have biliary tract calculi.