Atrophic gastritis can potentially lead to elevated ca724. CA724 (gastric cancer antigen) is one of the laboratory markers used to detect cancers of the digestive tract, such as gastric and colorectal cancers, and is also a non-specific tumor marker. It is mainly found in the gastrointestinal tract and has high sensitivity to gastric cancer, ovarian mucinous cystadenoma and non-small cell lung cancer, as well as biliary system tumors, colorectal cancer and pancreatic cancer. Elevated CA724 does not necessarily mean tumor, but can also be seen in benign gastrointestinal diseases, such as atrophic gastritis, gastrointestinal polyps, and so on, and even ulcers are seen in a small number of normal people. Specifically, the elevated level of CA724 should be observed, if the elevated level is more than 10 times of the normal value, it suggests that gastrointestinal tumors are more likely. Patients with atrophic gastritis are advised to consult a doctor in time for a clear diagnosis and targeted treatment under the doctor’s guidance.