title: Clinical usefulness of the serological gastric biopsy for the diagnosis of chronic autoimmune gastritis.
abstract: OBJECTIVE
  To assess the predictive value for chronic autoimmune gastritis (AIG) of the combined assay of anti-parietal-cell antibodies (PCA), anti-intrinsic-factor antibodies (IFA), anti-Helicobacter pylori (Hp) antibodies, and measurement of blood gastrin.
  
  
  METHODS
  We studied 181 consecutive patients with anemia, due to iron deficiency resistant to oral replacement therapy or to vitamin B12 deficiency.
  
  
  RESULTS
  83 patients (45.8%) tested positive for PCA and underwent gastroscopy with multiple gastric biopsies. On the basis of the histological diagnosis, PCA-positive patients were divided into 4 groups: (1) 30 patients with chronic atrophic gastritis; they had high concentrations of PCA and gastrin and no detectable IFA; (2) 14 subjects with metaplastic gastric atrophy; they had high PCA, IFA, and gastrin; (3) 18 patients with nonspecific lymphocytic inflammation with increased PCA, normal gastrin levels, and absence of IFA; (4) 21 patients with multifocal atrophic gastritis with "borderline" PCA, normal gastrin, absence of IFA and presence of anti-Hp in 100% of the cases.
  
  
  CONCLUSIONS
  The assay of four serological markers proved particularly effective in the diagnostic classification of gastritis and highly correlated with the histological profile. As such, this laboratory diagnostic profile may be considered an authentic "serological biopsy."
authors.affiliation: Laboratorio Analisi Chimico-Cliniche, Ospedale Civile, 35013 Cittadella, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Antico
authors.forename: Marilina
authors.initials: M
authors.lastname: Tampoia
authors.forename: Danilo
authors.initials: D
authors.lastname: Villalta
authors.forename: Elio
authors.initials: E
authors.lastname: Tonutti
authors.forename: Renato
authors.initials: R
authors.lastname: Tozzoli
authors.forename: Nicola
authors.initials: N
authors.lastname: Bizzaro
mesh_terms: D000368:Aged; D000906:Antibodies / Q000276:immunology; D001327:Autoimmune Diseases / Q000175:diagnosis* / Q000276:immunology* / Q000382:microbiology / Q000473:pathology; D001706:Biopsy / Q000379:methods*; D005260:Female; D005755:Gastrins / Q000276:immunology; D005757:Gastritis, Atrophic / Q000175:diagnosis* / Q000276:immunology / Q000382:microbiology / Q000473:pathology; D005773:Gastroscopy / Q000379:methods; D016481:Helicobacter Infections / Q000175:diagnosis / Q000276:immunology / Q000473:pathology; D016480:Helicobacter pylori / Q000276:immunology; D006801:Humans; D007437:Intrinsic Factor / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology; D008297:Male; D008875:Middle Aged; D010295:Parietal Cells, Gastric / Q000276:immunology / Q000473:pathology; D012698:Serologic Tests / Q000379:methods*
chemical_list: D000906:Antibodies; D005755:Gastrins; D007437:Intrinsic Factor