title: Gastritis associated with Crohn disease can be masked by Helicobacter pylori gastritis.
abstract: BACKGROUND
  Crohn disease (CD) is typically associated with focal inflammatory infiltrations. It is, however, unclear to what extent this CD-associated gastritis is masked by Helicobacter pylori gastritis.
  
  
  METHODS
  One hundred and three patients with CD underwent upper endoscopy. Antrum and corpus biopsy specimens were obtained and histologically evaluated for the presence of CD gastritis or H. pylori gastritis. In patients infected with H. pylori, eradication of the organism was initiated with repeated endoscopy/histology 7 days after termination of therapy.
  
  
  RESULTS
  Thirty patients were infected by H. pylori. Definite diagnosis of CD gastritis was made in 4 patients, in contrast to 31 of the 73 patients with no H. pylori gastritis (P < 0.001). In 19 patients with either no (n = 13) or only suspected diagnosis of CD gastritis (n = 6), elimination of H. pylori enabled definite diagnosis of CD gastritis in 5 of 13 and 4 of 6 patients, respectively.
  
  
  CONCLUSIONS
  Elimination of H. pylori facilitates the diagnosis of CD gastritis.
authors.affiliation: Mittelrhein-Klinik, Boppard, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Herz
authors.forename: J
authors.initials: J
authors.lastname: Schaube
authors.forename: A
authors.initials: A
authors.lastname: Meining
authors.forename: M
authors.initials: M
authors.lastname: Stolte
mesh_terms: D000328:Adult; D000465:Algorithms; D003424:Crohn Disease / Q000150:complications*; D003937:Diagnosis, Differential; D005260:Female; D005756:Gastritis / Q000150:complications* / Q000175:diagnosis / Q000473:pathology; D016481:Helicobacter Infections / Q000150:complications* / Q000473:pathology; D016480:Helicobacter pylori; D006801:Humans; D008297:Male; D008875:Middle Aged