It is not possible to generalize about how serious a high glycan antigen ca199 is. In general, the degree of elevation of glycaemic antigen ca199 is not necessarily proportional to the severity of the disease. Glycoantigen ca199 is high, suggesting the presence of pancreatitis, cirrhosis, diabetes, tumors and other diseases. Gastric cancer, colon cancer, rectal cancer, pancreatic cancer, breast cancer and other diseases, can lead to glycan antigen ca199 significantly high, dozens or even hundreds of times the normal value. However, some benign diseases such as biliary tract infection, acute pancreatitis can also have ca199 significantly elevated, but can be restored after inflammation control. Glycoantigen ca199 is not much higher, but may also be serious. Such as acute pancreatitis, cirrhosis and other diseases, treatment is not timely can also be life-threatening. The dynamic change of glycan antigen ca199 can be used as a judgment of the effect of anticancer treatment. When the treatment is effective, this index will gradually decrease until it returns to the normal value. Therefore, the interpretation of glycan antigen ca199 needs to be combined with other clinical examination results, such as imaging examinations, such as abdominal CT, MRI, and other blood tests, such as liver function, amylase, blood routine, and other tumor markers, to make a comprehensive evaluation. It is recommended that the doctor analyze the patient’s condition.