Aspirin Use for Gastric Cancer Prevention in the Early Gastric Cancer Patients

This trial tests whether taking low-dose aspirin after endoscopic removal of early stomach cancer or high-grade stomach lesions can help prevent new stomach cancer from developing. **You may be eligible if...** - You are a man or woman aged 19–70 - You had an endoscopic procedure to remove high-grade stomach lesions or early gastric cancer - Your pathology results met criteria for complete removal - Your H. pylori status is negative or has been successfully treated **You may NOT be eligible if...** - You already take aspirin to prevent heart disease or stroke - You take anticoagulants or antiplatelet drugs for treatment - You have had stomach surgery before - You have serious heart, liver, kidney, or lung conditions - You have conditions that increase your risk of bleeding (aneurysm, varices, hemophilia) - You have active peptic ulcers or are being treated for another cancer Talk to your doctor to see if this trial is right for you.