Clinical features of isolated proximal‐type immunoglobulin G4‐related sclerosing cholangitis

Background and Aim Immunoglobulin G4‐related sclerosing cholangitis (IgG4‐ SC ) presents as isolated proximal‐type sclerosing cholangitis (i‐ SC ). The present study sought to clarify the imaging differences between i‐ SC and Klatskin tumor. Differences between i‐ SC and IgG4‐ SC associated with autoimmune pancreatitis ( AIP ‐ SC ) were also studied. Methods Differentiating factors between i‐ SC and Klatskin tumor were studied. Serum IgG4 level,...