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The paper presents the results of the 10-year follow-up of 1,237 patients at high risk for stomach cancer. Among them, 669 patients suffered from chronic gastric ulcer, 78--polyps, 382--chronic gastritis and 108 underwent resection of the stomach more than 10 years ago. Repeated gastroscopic examinations, including biopsy, carried out within the last two years, revealed malignancies in 405 cases (32,7%): chronic ulcers--10.8, polyps--11.1 and chronic gastritis--0,6%. Malignancy of the gastric stump was observed in 5.0%. In chronic gastritis patients, cancer development was registered in cases of hyperplasia only (4.5%). No malignancy was found in cases of reorganization gastritis and atrophic gastritis.
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