[Research status and challenges in immunoglobulin G4-related hepatobiliary disease].

IgG4-associated hepatobiliary diseases are group of autoimmune diseases characterized by lymphoplasmacytic infiltrates with an elevated serum IgG4 levels, affecting pancreas and biliary tract. In addition, it mainly includes IgG4-related sclerosing cholangitis, IgG4-related autoimmune pancreatitis and IgG4-related autoimmune hepatitis. An accurate diagnosis helps to avoid unnecessary surgery. Notably, an early diagnosis and treatment can improve the prognosis and enhance the quality of life. This review will focus on research advances and difficulties encountered in the study of IgG4 related hepatobiliary diseases.