CA724 single high recommended regular retesting, and improve the imaging, pathology and other tests, identify the cause of the disease to take drug or surgical treatment. CA724 is a commonly used clinical tumor marker, and its elevated level is most commonly found in gastrointestinal diseases, benign diseases such as chronic gastritis and enteritis, malignant diseases such as gastric cancer, as well as other systemic cancers, such as mucinous cystic adenocarcinoma of the ovary, non-small-cell lung cancer, biliary tract tumors, colorectal cancer, etc. It cannot be used independently for the diagnosis of diseases, and its results may have problems. CA724 cannot be used independently for disease diagnosis, and its test results may have errors, so it is recommended to retest, if there is still a significant elevation after retesting, then it is necessary to improve the imaging and pathology to clarify the location and type of lesions. For benign diseases such as chronic gastritis, medication can be used to eradicate H. pylori infection, protect the gastric mucosa, and promote gastric motility; for malignant diseases such as gastric cancer, radiotherapy, chemotherapy, targeted therapy, and surgery can be chosen according to the type and stage of the lesion. It is recommended to consult a doctor in time to standardize diagnosis and treatment when necessary.