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Gastric cancer: pathogenesis, risks, and prevention.

Pentti Sipponen1

  • 1Department of Pathology, Jorvi Hospital, Espoo, Finland.

Journal of Gastroenterology
|July 12, 2002
PubMed
Summary

Helicobacter pylori infection increases the risk of intestinal (IGCA) and diffuse (DGCA) gastric adenocarcinomas. Early eradication of H. pylori may prevent up to 80% of these gastric cancers.

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Area of Science:

  • Gastroenterology and Oncology

Background:

  • Intestinal (IGCA) and diffuse (DGCA) gastric adenocarcinomas are distinct subtypes with differing epidemiological and demographic profiles.
  • Both IGCA and DGCA account for approximately 40% of all gastric adenocarcinomas.
  • Diffuse gastric adenocarcinomas (DGCA) are more common in younger individuals, affect the gastric corpus, and are less associated with atrophic gastritis and intestinal metaplasia compared to intestinal gastric adenocarcinomas (IGCA).

Purpose of the Study:

  • To elucidate the epidemiological and demographic differences between IGCA and DGCA.
  • To investigate the role of Helicobacter pylori infection and its association with precancerous conditions in gastric adenocarcinoma development.
  • To highlight the potential for prevention of gastric adenocarcinomas through H. pylori eradication.

Main Methods:

  • Comparative analysis of epidemiological and demographic data for IGCA and DGCA.
  • Assessment of the association between H. pylori infection, atrophic gastritis, intestinal metaplasia, and the risk of both gastric adenocarcinoma subtypes.
  • Review of known pathogenic and morphogenetic pathways for IGCA and DGCA.

Main Results:

  • H. pylori infection is a significant risk factor for both IGCA and DGCA.
  • The risk of both tumor types increases with the grade and extent of atrophic gastritis and intestinal metaplasia.
  • While DGCA pathogenesis is not fully understood, IGCA morphogenesis involves identifiable precancerous conditions like atrophic gastritis, intestinal metaplasia, adenomas, and dysplasias.

Conclusions:

  • H. pylori gastritis can lead to genomic errors, resulting in neoplastic tumors.
  • Atrophic gastritis, a consequence of H. pylori infestation, develops in over half of infected individuals.
  • Early eradication of H. pylori infection presents a potential strategy to prevent a substantial proportion of IGCA and DGCA cases.

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