Glutamyl transpeptidase is widely distributed in various organs and tissues of the body, among which kidney, liver and pancreas have the highest content, but glutamyl transpeptidase in serum mainly comes from hepatobiliary system, and if glutamyl transpeptidase in blood is increased, it may be considered to be caused by blockage of hepatobiliary system. Generally, increased glutamyl transpeptidase is commonly found in the following diseases, namely, diseases of the hepatobiliary system, such as stones in the lower part of the common bile duct, tumors or tumors in the head of the pancreas, which can lead to increased glutamyl transpeptidase. There are also certain pancreatic diseases, such as acute and chronic pancreatitis, which can also lead to increased glutamyl transpeptidase. In addition, certain patients with fatty liver, myocardial infarction, and prostate tumors can also lead to increased glutamyl transpeptidase.