Sarcoidosis, sclerosing cholangitis, and chronic atrophic autoimmune gastritis: a case of infiltrative sclerosing cholangitis.

We report a patient in whom sarcoidosis coexisted with sclerosing cholangitis and chronic atrophic autoimmune gastritis. There are some autoimmune diseases associated with primary sclerosing cholangitis; the difference between sarcoidosis and all other autoimmune diseases associated with primary sclerosing cholangitis is the ability of the former to damage the biliary tree. Moreover, when sarcoidosis behaves like cholestasis it can damage the biliary tree, mimicking primary sclerosing cholangitis, with high immunoglobulin M but without inflammatory bowel disease and p-ANCAs negative. We believe that it should be regarded as a single disease "infiltrative sclerosing cholangitis" because this is not a primary disease and sarcoidosis would be responsible for a beaded biliary tree.