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  • Title: Effect of Helicobacter pylori infection and its eradication on the fate of gastric polyps.
    Author: Nam SY, Park BJ, Ryu KH, Nam JH.
    Journal: Eur J Gastroenterol Hepatol; 2016 Apr; 28(4):449-54. PubMed ID: 26735158.
    Abstract:
    OBJECTIVES: Western guidelines recommend Helicobacter pylori eradication in H. pylori-associated gastric polyps, but Korean medical insurance does not approve its eradication. The aim of this study is to evaluate the effect of H. pylori eradication on gastric polyps. METHODS: Participants in a large screening cohort underwent baseline and follow-up esophagogastroduodenoscopy and H. pylori testing. The association between gastric polyps and H. pylori was estimated using odds ratios (ORs) adjusted for confounding factors and 95% confidence intervals (CIs). The effect of H. pylori eradication on the fate of polyps was also evaluated. RESULTS: The screening cohort included 7603 participants (605 gastric polyps: 529 hyperplastic polyps, 63 fundic gland polyps, and 13 adenomas). H. pylori infection showed a positive association with hyperplastic polyps (OR 2.01; 95% CI 1.66-2.41), but was inversely related to fundic gland polyps (OR 0.05; 95% CI 0.02-0.17). Removed polyps by biopsy or endoscopic resection or tiny polyps less than 3 mm at baseline and positive conversion of H. pylori at follow-up were excluded. A total of 7060 persons were finally included to evaluate the effect of H. pylori eradication on the gastric polyp. Successful H. pylori eradication (OR 0.52; 95% CI 0.35-0.77) and persistent H. pylori-negative status (OR 0.59; 95% CI 0.46-0.76) reduced the risk of hyperplastic polyps compared with the persistent H. pylori-positive group. Successful H. pylori eradication markedly induced the disappearance of hyperplastic polyps compared with the persistent H. pylori-positive group (85.0 vs. 29.0%, P=0.001). CONCLUSION: H. pylori infection increased the risk of hyperplastic polyps in both cross-sectional and longitudinal settings, and its eradication induced regression of hyperplastic polyps.
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