title: Ten year follow up study of lymphocytic gastritis: further evidence on Helicobacter pylori as a cause of lymphocytic gastritis and corpus gastritis.
abstract: OBJECTIVE
  To examine the course of lymphocytic gastritis and its relation to Helicobacter pylori (H pylori) infection in a 10 year follow up.
  
  
  METHODS
  Ninety six patients were originally examined for dyspepsia in 1981. Gastroscopies with stepwise biopsies were performed on all the patients initially and after an interval of 10 years.
  
  
  RESULTS
  Nine per cent of the patients (9/96) had features of lymphocytic gastritis in gastric biopsy at the first examination, and 12.5% (12/96) at the second examination; 7/9 patients (78%) had persistent lymphocytic gastritis during the follow up; in two the diagnostic features of lymphocytic gastritis had disappeared, and five had a new diagnosis of lymphocytic gastritis at the second examination. At the second examination 9/12 lymphocytic gastritis patients (75%) were H pylori positive histologically, while all had specific antibodies to H pylori. The lymphocytic gastritis patients had higher grades of gastritis (p = 0.009), neutrophilic and eosinophilic granulocytes, mononuclear inflammatory cells, and foveolar hyperplasia in the corpus mucosa, but smaller numbers of H pylori, than the H pylori positive patients without lymphocytic gastritis. The appearance of lymphocytic gastritis during the 10 year interval was associated with increases in the grades of corpus gastritis and neutrophilic granulocytes (p = 0.043 for both). During the follow up, the patients with lymphocytic gastritis, but not the H pylori positive patients without lymphocytic gastritis, appeared to have a significant increase in the grade of intestinal metaplasia in the corpus mucosa (p = 0.043).
  
  
  CONCLUSIONS
  In some patients H pylori may cause a gastritis that predominates in the corpus and is associated with an increase in the intraepithelial lymphocyte count. This form of gastritis may cause progression of intestinal metaplasia.
authors.affiliation: Department of Internal Medicine, University Hospital of Oulu, 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
authors.forename: R
authors.initials: R
authors.lastname: Karttunen
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005500:Follow-Up Studies; D005753:Gastric Mucosa / Q000382:microbiology / Q000473:pathology; D005756:Gastritis / Q000382:microbiology* / Q000473:pathology; D016481:Helicobacter Infections / Q000473:pathology*; D016480:Helicobacter pylori / Q000302:isolation & purification*; D006801:Humans; D007958:Leukocyte Count; D008214:Lymphocytes / Q000473:pathology*; D008297:Male; D008679:Metaplasia / Q000382:microbiology; D008875:Middle Aged; D011706:Pyloric Antrum / Q000382:microbiology