Being positive for H. pylori does not elevate CA724, but if the H. pylori infection causes a neoplastic disease such as stomach cancer, CA724 will appear elevated. H. pylori is a common infection that does not cause any symptoms in most people, some people may develop stomach disorders that lead to ulcers in the stomach, and a small number of people will develop a risk of cancer. If H. pylori infection is followed by conditions such as inflammation or tumors in the stomach, it can cause elevated CA724. Clinically, the tumor marker CA724 is commonly used to differentiate gastric cancer, but patients with benign diseases and non-gastric cancer patients may also show elevated CA72-4 in some cases. Because there are various causes of gastric cancer, and gastric cancer caused by H. pylori infection is only one of them, there is no direct correlation between CA724 as a diagnostic marker and H. pylori positivity. If H. pylori is found to be positive or CA724 is elevated, it is recommended to consult a doctor for a clear diagnosis and targeted treatment or therapy.