title: Helicobacter pylori infection in young patients with gastric carcinoma.
abstract: BACKGROUND
  Helicobacter pylori infection has been linked with chronic atrophic gastritis and gastric cancer. This case-control study was performed to investigate a possible relationship between H. pylori infection and gastric cancer in young age groups.
  
  
  METHODS
  Gastrectomy and/or biopsy samples were collected from 50 consecutive patients 45 years old or younger treated between 1980 and 1994 for noncardiac gastric cancer. The control group consisted of age- and sex-matched dyspeptic patients. The presence of H. pylori infection was assessed by modified Giemsa staining and immunostaining, using antibody against H. pylori.
  
  
  RESULTS
  H. pylori was found in 36 (72%; 95% confidence interval 60-84%) cancer patients and in 22 (43%; 30-58%) control patients (p = 0.0023, chi-square test). The odds ratio was 3.27 (1.42-7.52). Nonatrophic (superficial) gastritis was present in 30 (60%) cancer patients and in 19 (38%) (p = 0.028, chi-square test) control cases.
  
  
  CONCLUSIONS
  The results of the present study support the hypothesis that H. pylori is a risk factor for gastric cancer also in young age groups and in patients with a diffuse type of gastric cancer.
authors.affiliation: Second Dept. of Surgery, Helsinki University Central Hospital, Finland.
authors.forename: A
authors.initials: A
authors.lastname: Kokkola
authors.forename: J
authors.initials: J
authors.lastname: Valle
authors.forename: R
authors.initials: R
authors.lastname: Haapiainen
authors.forename: P
authors.initials: P
authors.lastname: Sipponen
authors.forename: E
authors.initials: E
authors.lastname: Kivilaakso
authors.forename: P
authors.initials: P
authors.lastname: Puolakkainen
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000032:analysis; D005260:Female; D005757:Gastritis, Atrophic / Q000150:complications; D016481:Helicobacter Infections / Q000150:complications*; D016480:Helicobacter pylori / Q000276:immunology; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000150:complications*
chemical_list: D000907:Antibodies, Bacterial