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Helicobacter pylori Eradication Reduces the Metachronous Recurrence of Gastric Neoplasms by Attenuating the Precancerous Process

  • Jung, Da Hyun (Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine) ;
  • Kim, Jie-Hyun (Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine) ;
  • Lee, Yong Chan (Department of Internal Medicine, Yonsei University College of Medicine) ;
  • Lee, Sang Kil (Department of Internal Medicine, Yonsei University College of Medicine) ;
  • Shin, Sung Kwan (Department of Internal Medicine, Yonsei University College of Medicine) ;
  • Park, Jun Chul (Department of Internal Medicine, Yonsei University College of Medicine) ;
  • Chung, Hyun Soo (Department of Internal Medicine, Yonsei University College of Medicine) ;
  • Kim, Hyunki (Department of Pathology, Yonsei University College of Medicine) ;
  • Kim, Hoguen (Department of Pathology, Yonsei University College of Medicine) ;
  • Kim, Yong Hoon (Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine) ;
  • Park, Jae Jun (Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine) ;
  • Youn, Young Hoon (Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine) ;
  • Park, Hyojin (Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine)
  • Received : 2015.11.14
  • Accepted : 2015.12.15
  • Published : 2015.12.31

Abstract

Purpose: The importance of Helicobacter pylori eradication after endoscopic resection (ER) of gastric neoplasms remains controversial. In this study, we clarified the importance of H. pylori eradication for metachronous lesions after ER. Materials and Methods: This study included 3,882 patients with gastric neoplasms who underwent ER. We included patients infected with H. pylori who received eradication therapy. Among them, 34 patients with metachronous lesions after ER and 102 age- and sex-matched patients (nonmetachronous group) were enrolled. Background mucosal pathologies such as atrophy and intestinal metaplasia (IM) were evaluated endoscopically. The expression levels of CDX1, CDX2, Sonic hedgehog (SHH), and SOX2 were evaluated based on H. pylori eradication and the development of metachronous lesions. Results: The eradication failure rate was higher in the metachronous group than in the nonmetachronous group (P=0.036). Open-type atrophy (P=0.003) and moderate-to-severe IM (P=0.001) occurred more frequently in the metachronous group. In patients with an initial diagnosis of dysplasia, the eradication failure rate was higher in the metachronous group than in the nonmetachronous group (P=0.002). In addition, open-type atrophy was more frequent in the metachronous group (P=0.047). In patients with an initial diagnosis of carcinoma, moderate-to-severe IM occurred more frequently in the metachronous group (P=0.003); however, the eradication failure rate was not significantly different between the two groups. SHH and SOX2 expression was increased, and CDX2 expression was decreased in the nonmetachronous group after eradication (P<0.05). Conclusions: Open-type atrophy, moderate-to-severe IM, and H. pylori eradication failure were significantly associated with metachronous lesions. However, eradication failure was significantly associated with dysplasia, but not carcinoma, in the metachronous group. Thus, H. pylori eradication may play an important role in preventing metachronous lesions after ER for precancerous lesions before carcinomatous transformation.

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