Gastric Cancer Registry for Epidemiology and Molecular Risk Factor

This study is a multi-center, prospective cohort study which are planned to enroll the 2,500 patients who diagnosed the primary gastric cancer and 5,000 healthy normal cohort participants for 5 years. All participants who enrolled in this registry, the participants were questioned by the gastric cancer survey and the serum and tissue of these participants were analyzed. The main aim of this study is 1. To evaluate the optimal interval of endoscopic screening for early detection of gastric cancer and risk factors in Korean. 2. To evaluate the diagnostic validity of serum biomarker (combining pepsinogen, H pylori IgG Antibody, and TFF3) as a screening test for detection of GC in Korean.