CA724 is a tumor marker, usually digestive tract cancer, ovarian cancer, lung cancer and other diseases may have elevated phenomenon. However, a single indicator can not determine whether the disease, patients also need to carry out other tests to clarify, and then under the guidance of the doctor targeted treatment. The level of CA724 in normal human serum is less than 6 U/mL, but it is not a specific indicator. Elevated CA724 can be found in various digestive tract cancers, ovarian cancers, lung cancers, as well as in benign diseases such as pancreatitis, cirrhosis of the liver, and ovarian cysts. Therefore, patients also need to combine their clinical manifestations with appropriate auxiliary examinations to clarify the diagnosis. Generally, since CA724 is more sensitive to gastric cancer, patients are recommended to undergo gastroscopy to determine whether it is caused by gastric cancer. If the patient’s clinical symptoms are not obvious, it is recommended to have regular checkups to monitor the changes of this index. If there is any discomfort, patients should consult the doctor in time for treatment. If there is no obvious symptom, patients should not worry too much, as the elevation of a single index does not necessarily have clinical significance.