Clinically, most patients with atrophic gastritis may have mildly elevated CA724 values, but the presence of elevated CA724 does not necessarily mean that the patient has atrophic gastritis. CA724 is commonly used as an aid in the diagnosis of gastrointestinal inflammation or tumors, but the elevated value does not clarify the cause, which may be a gastrointestinal tumor or due to gastrointestinal inflammation. Depending on the elevated CA724 level, if it is only slightly elevated or not multiply elevated, inflammation is generally considered to be more likely. If the CA724 level increases exponentially, generally higher than the normal range of 3 times and above, consider the possibility of tumor, but the specific diagnosis, but also need to be through the gastroscopy pathology examination, while assisting the abdominal CT and other tests comprehensive assessment. To sum up, elevated CA724 value lacks specificity in the diagnosis of gastrointestinal diseases. Elevated value may suggest the possibility of gastrointestinal tumors or inflammation, but the value is not elevated, which does not exclude the possibility of gastrointestinal inflammation. It is recommended that the patient should consult the doctor in time, and standardize the treatment after clarifying the cause of the disease.