title: Follow-up of Helicobacter pylori positive gastritis and argyrophil cells pattern during the natural course of gastric ulcer.
abstract: BACKGROUND
  A follow-up of argyrophil cell hyperplasia in Helicobacter pylori-positive corpus gastritis in gastric ulcer patients during the natural course of ulcer disease.
  
  
  METHODS
  Endoscopic biopsies (4 specimens) were obtained step-wise from the posterior wall of the corpus mucosa in 55 gastric ulcer (GU) patients. The natural course of GU was followed up in 38 patients during more than 10 years (maximum 19 years), and altogether 115 endoscopic examinations were made: 20 patients were re-examined once, 14 twice, and 4 three times. A total of 364 biopsies from 307 biopsy sites were stained by Grimelius' silver, hematoxylin-eosin, and Giemsa method for the analysis of the argyrophil endocrine cells, chronic gastritis, and H. pylori colonization, respectively, according to the Sydney System.
  
  
  RESULTS
  Of 307 biopsy sites, 153 (50%) showed some grade of ACH. Focal (linear/micronodular) hyperplasia was found in 118 (77%) of biopsy sites; it was detected in 78 (66%) cases of atrophic corpus mucosa, but was present in only 14 (12%) cases of gastritis without atrophy or in the normal mucosa. In the follow-up patients, ACH evolved in 17 and progressed in 6 cases, and a simultaneous development of atrophic corpus gastritis was found in 20 cases.
  
  
  CONCLUSIONS
  This study demonstrates that ACH evolves during the natural course of GU, alongside the development of chronic atrophic gastritis.
authors.affiliation: Faculty of Medicine, University of Tartu, Estonia.
authors.forename: H I
authors.initials: HI
authors.lastname: Maaroos
authors.forename: N
authors.initials: N
authors.lastname: Havu
authors.forename: P
authors.initials: P
authors.lastname: Sipponen
mesh_terms: D000328:Adult; D000368:Aged; D000863:Antacids / Q000008:administration & dosage; D019858:Enteroendocrine Cells / Q000382:microbiology / Q000473:pathology*; D005260:Female; D005500:Follow-Up Studies; D005755:Gastrins / Q000032:analysis / Q000097:blood; D005756:Gastritis / Q000188:drug therapy / Q000382:microbiology / Q000473:pathology*; D016480:Helicobacter pylori; D006801:Humans; D006965:Hyperplasia; D008297:Male; D008875:Middle Aged; D013276:Stomach Ulcer / Q000188:drug therapy / Q000382:microbiology / Q000473:pathology*
chemical_list: D000863:Antacids; D005755:Gastrins