In order to further standardize the diagnosis and treatment of rare diseases and ensure medical quality and safety， National Health Commission of the People’s Republic of China developed the guidelines for the diagnosis and treatment of 86 diseases in the Second List of Rare Diseases， which were officially released in June 2025， including five rare hepatobiliary diseases of Alagille syndrome， α1-antitrypsin deficiency， congenital biliary atresia， primary biliary cholangitis， and primary sclerosing cholangitis. This article introduces the etiology， epidemiology， clinical manifestations， auxiliary examination， diagnosis， and treatment of Alagille syndrome， in order to provide a reference for clinical practice.
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