From January 1987 to October 1991, we performed 14,333 cases of upper gastrointestinal endoscopy and diagnosed 527 cases with U.G.I polyp. We assesed these 527 cases and obtained following. results：
1) The overall incidence of U.G.I. polyps was 3.6％ , and there was no sexual difference. The peak incidence was in 6th decades(32.4％).
2) The U.GI1. polyps were located chiefly at stomach(415 cases, 78.7％), among which antrum occupied antrum 43.5％, body 24.0％ and funds 5.1％. And the others were esophagus(6.5％) and duodenum(12.3％).
3) The size of U.G.I. polyp was below 1cm in 72.3％, from 1cm to 1.9cm in 20.7％ and above 2cm in 7.0％. According to Yamada’ classification, type Ⅰ, Ⅱ, Ⅲ and Ⅳ was 31.9％, 51.3％, 13.7％ and 3.0％.
4) Histological nature of U.I.G. polyp were hyperplastic polyp(85.8％), adenomatous polyps(9.3％), carcinomatous polyps(3.3％) and etc. The size of neoplastic polyp such as adenomatous polyps(mean 1.0±0.7cm) and carcinomatous polyps(mean 2.0±1.8) were larger than hyperplastic polyp(mean 0.6±0.4) (p<0.05).
5) The gastric polyps were associated with peptic ulcer(7.5％), gastric cancer(3.2％), other malignancy(3.5％), hepatobiliary disease(5.5％), post subtotal gastrectomy(5.5％). And others(75％) were not associated with specific disease.
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