Glycoantigen 724 is a marker for detecting gastrointestinal cancer, lung cancer, ovarian cancer, pancreatitis, and pulmonary disease, which can assist in understanding the histogenesis, cell differentiation, and cell function of tumors and facilitate diagnosis, classification, prognosis judgment, and treatment guidance. Elevated glycoantigen 724 can be seen in malignant tumors such as gastric cancer, ovarian cancer, colorectal cancer and pancreatic cancer. However, the elevation of this index is not specific, and the diagnosis of cancer needs to be combined with other biochemical indicators and related imaging and pathological examinations. Secondly, the index may also be increased when benign diseases such as gastrointestinal ulcers are present. In summary, for patients who have not been diagnosed with gastric cancer or colorectal cancer, elevated indexes need to be monitored dynamically and, if necessary, abdominal CT and electronic gastroscopy should be performed to rule out the presence of malignant tumors in the gastroduodenal region. For patients who have been diagnosed with these cancers, if the condition occurs after treatment, they need to be actively treated again by a doctor.