High glycinyl proline dipeptide aminopeptidase is seen in liver diseases, kidney diseases, etc. Glycinyl proline dipeptide aminopeptidase is mainly distributed in human liver, kidney, connective tissue, serum, salivary glands and other fluids, and the soluble fraction and activity in human cells are significantly increased in patients with liver diseases such as hepatocellular carcinoma, both primary and secondary, liver cirrhosis, chronic viral hepatitis, etc. Patients will be found to have high enzymes in hospital tests, but mainly as a result of viral hepatitis B. There are also caused by kidney diseases, nephrotic syndrome and glomerulonephritis, which can also cause high enzyme indices. Therefore, when elevated aminopeptidase is found during the examination, it is mainly considered to be caused by liver disease, kidney disease, and malignant tumors, and tumors in the liver area should also be tested to distinguish the benign and malignant nature of the tumors.