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Early gastric cancer (EGC) is defined as a cancer that does not invade beyond the submucosa regardless of lymph node involvement (T1, any N).Initiation of national cancer screening programs in Korea and Japan had increased the number of EGC cases dramatically, which accounts for up to 50% of all gastric cancer diagnosis.The 5-year survival rate is about 99% if EGC is confined to mucosa, and about 95% if confined to submucosa, according to several studies.