title: Endoscopic duodenitis, gastric metaplasia and Helicobacter pylori.
abstract: OBJECTIVE
  The purpose of this study was to investigate the relationship between gastric metaplasia and Helicobacter pylori in patients with endoscopic duodenitis.
  
  
  METHODS
  The subjects were 57 patients with endoscopic duodentitis with or without H. pylori-associated gastritis. Biopsy specimens were obtained from the stomach and duodenal bulb to assess the histological findings and H. pylori infection. Gastric metaplasia was divided into three types: complete, intermediate and incomplete, according to the amount of mucus in the metaplastic cells. In 10 H. pylori-positive patients, endoscopic and histological findings of duodenitis were compared before and after eradication of the bacteria.
  
  
  RESULTS
  There was no significant difference in the extent of gastric metaplasia or the appearance and severity of endoscopic duodenitis between H. pylori-positive and -negative groups. The complete type of gastric metaplasia was frequently detected in the H. pylori-negative group, whereas the incomplete type was frequently observed in the H. pylori-positive group. After eradication of H. pylori, the incomplete type changed to the complete type with a decrease of histological inflammation.
  
  
  CONCLUSIONS
  The complete type of gastric metaplasia occurred frequently without H. pylori infection, whereas the incomplete type was frequently associated with H. pylori infection.
authors.affiliation: Department of Gastroenterology, Urakami Gastro Clinic, Tokushima, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Urakami
authors.forename: T
authors.initials: T
authors.lastname: Sano
mesh_terms: D000328:Adult; D000368:Aged; D004382:Duodenitis / Q000382:microbiology / Q000473:pathology*; D004386:Duodenum / Q000473:pathology; D016099:Endoscopy, Gastrointestinal; D005260:Female; D005753:Gastric Mucosa / Q000473:pathology*; D016481:Helicobacter Infections / Q000150:complications / Q000473:pathology*; D016480:Helicobacter pylori; D006801:Humans; D008297:Male; D008679:Metaplasia; D008875:Middle Aged