title: Helicobacter pylori-associated gastritis. Evolution of histologic changes over 10 years.
abstract: BACKGROUND
  Helicobacter pylori seems to be the commonest cause of chronic gastritis, but the natural course of H. pylori-associated gastritis is largely obscure.
  
  
  METHODS
  We present a histologic follow-up of 39 patients with H. pylori-positive gastritis. Gastroscopies with stepwise biopsies were performed in all the patients at an interval of 10 years.
  
  
  RESULTS
  Of the patients 87% (34/39) had a persistent infection and showed a significant decrease in the grades of antral gastritis, eosinophilic granulocytes, corpus eosinophilic granulocytes, and foveolar hyperplasia and a significant increase in the grade of corpus neutrophilic granulocytes. The quantities of H. pylori as estimated histologically did not change significantly during the follow-up period in patients with a persistent infection. In the five other patients (13%) the H. pylori infection had apparently disappeared spontaneously, and this was accompanied by decreases in the amount of inflammatory cells in the gastric mucosa.
  
  
  CONCLUSIONS
  H. pylori infection in the gastric mucosa is chronic and may be associated with both regressive and progressive histologic changes. Spontaneous healing of H. pylori infection is possible and is associated with partial resolution of the inflammatory changes in the gastric mucosa.
authors.affiliation: Dept. of Internal Medicine, Oulu University Hospital, Finland.
authors.forename: S
authors.initials: S
authors.lastname: Niemelä
authors.forename: T
authors.initials: T
authors.lastname: Karttunen
authors.forename: T
authors.initials: T
authors.lastname: Kerola
mesh_terms: D000328:Adult; D000368:Aged; D001706:Biopsy; D002908:Chronic Disease; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D005753:Gastric Mucosa / Q000382:microbiology / Q000473:pathology; D005756:Gastritis / Q000382:microbiology* / Q000473:pathology / Q000503:physiopathology; D005773:Gastroscopy; D016481:Helicobacter Infections / Q000473:pathology / Q000503:physiopathology*; D016480:Helicobacter pylori / Q000302:isolation & purification*; D006801:Humans; D008297:Male; D008875:Middle Aged