Glycoantigen 199 elevation can not be found, should pay close attention to the changes in this indicator, monthly review, persistent elevation of the relevant ultrasound, CT and other tests. ca199 is a commonly used clinical tumor indicator, which has an important clinical value in liver malignancy, gynecology and digestive tract malignancy. If this index is only high, it is not of great clinical value, so patients should not worry too much and review the changes of this index on time. For very early malignant tumors, if this indicator is elevated, due to the small number of tumor cells, it is difficult to be detected by imaging, and only through continuous observation of this indicator, and then assess whether there is a tumor. If this index continues to rise after successive reviews, you should pay close attention to relevant imaging examinations, and once the occupying lesions are found, timely surgical resection is often able to achieve a better therapeutic effect. Therefore, if the cause of the elevation of glycoantigen 199 cannot be found, the changes of this index should be continuously observed, and relevant imaging examinations should be performed if necessary.