CA724-(gastric cancer antigen) cancer-related antigen CA724 enzyme immunoassay is mainly used for screening and follow-up of patients with gastric cancer. In case of abnormal results, it is likely to have gastric cancer and other malignant tumors. However, clinical and other test results must be combined if a definitive diagnosis is to be made. Benign diseases: Elevated serum CA72-4 can be seen in the following diseases: pancreatitis, cirrhosis, lung disease, rheumatism, gynecological disease, benign ovarian disease, ovarian cysts, breast disease and benign gastrointestinal disorders. The main advantage of CA72-4 compared to other markers is its high specificity for the differential diagnosis of benign lesions. Gastric cancer: The diagnostic sensitivity is 28-80%, usually 40-46%. The diagnostic specificity for benign gastrointestinal diseases is more than 95%. elevated CA72-4 is associated with the stage of the disease. After surgery, CA72-4 levels can drop rapidly to normal values. If the tumor is no longer present, CA72-4 may continue to be maintained at normal levels. In 70% of recurrent cases, CA72-4 concentrations are first elevated or are also elevated at the time of clinical diagnosis of recurrence. Some findings suggest that preoperative CA72-4 levels can be used as a reference value for prognostic determination. Ovarian cancer: The diagnostic sensitivity is 47-80%. The diagnostic sensitivity of mucinous ovarian cancer is higher than that of CA125, and the combination of the two indicators can increase the sensitivity of the first diagnosis to 73% (CA125 alone: 60%); the diagnostic sensitivity of dynamic surveillance can increase to 67% (CA125 alone: 60%). Colorectal cancer: the diagnostic sensitivity is 20-41%. And the diagnostic specificity for benign colon disease is 98%. CA72-4 can decrease significantly after complete resection. CA72-4 continues to rise when cancerous tissue is present in the body. CA72-4 in combination with CEA increases the diagnostic sensitivity of postoperative surveillance from 78% to 87%. Thus, if you find elevated CA724 on physical examination or occasionally, there is no need to panic because about half of them are probably not tumors, especially those with low levels of elevation. Of course, you should not take it lightly, but the best way is to go to a hospital to see a specialist for examination.