Elevated glutamyl transpeptidase is mainly seen in the following: 1. If the patient has a history of heavy alcohol consumption, accompanied by elevated glutamyl transpeptidase, alcoholic hepatitis should be considered; 2. If the patient has obesity and other factors, accompanied by elevated glutamyl transpeptidase, non-alcoholic fatty liver disease should be considered; 3. If the patient has elevated glutamyl transpeptidase during medication, drug-related liver injury should be considered; 4. 5.If elevated glutamyl transpeptidase is accompanied by elevated alkaline phosphatase, biliary tract diseases, such as biliary inflammation, biliary obstruction or even biliary tract tumor, should be considered; 6.When alkaline phosphatase and glutamyl transpeptidase are elevated simultaneously, autoimmune liver disease should be considered, and relevant examinations should be conducted to identify primary biliary cholangitis and primary sclerosis. cholangitis and primary sclerosing cholangitis.