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Updated: Nov 16, 2025
Mouse Models Of Helicobacter Infection And Gastric Pathologies
Published on: October 18, 2018
Features That Aid Identification of Autoimmune Gastritis in a Background of Active Helicobacter pylori Infection
Jui Choudhuri1, Sara Hall2, Carlos A Castrodad-Rodriguez1
1From the Department of Pathology, Montefiore Medical Center, Bronx, New York (Choudhuri, Castrodad-Rodriguez, Panarelli).
Context.—:
Helicobacter pylori-associated and autoimmune gastritis may coexist in a subset of patients who require treatment for both disorders.
Objective.—:
To delineate findings that identify autoimmune gastritis in the background of H pylori infection.
Design.—:
We examined cases of (1) patients with H pylori-associated gastritis who had successful eradication therapy and subsequent biopsies diagnostic of autoimmune gastritis and (2) H pylori-associated gastritis wherein pathologists noted features of autoimmune gastritis during original interpretation. Control patients underwent H pylori eradication but lacked evidence of autoimmune gastritis or H pylori infection after 10 years of follow-up.
Results.—:
Eight subjects had H pylori-associated gastritis followed by H pylori-negative sampling that showed autoimmune gastritis. Review of original samples showed full-thickness inflammation of oxyntic mucosa in 8 of 8 and oxyntic gland loss in 7 of 8 cases. Enterochromaffin-like (ECL) cell hyperplasia, pyloric metaplasia, and intestinal metaplasia were present in 4 of 8 (80% of 5 tested cases), 4 of 8, and 3 of 8 cases, respectively. Features of autoimmune gastritis were noted at the time of their original H pylori diagnosis in 11 study subjects. Ten of 11 samples displayed full-thickness inflammation of oxyntic mucosa and/or partial loss of oxyntic glands, 8 of 11 had ECL cell hyperplasia (all tested cases), 6 of 11 showed pyloric metaplasia, and 4 of 11 harbored intestinal metaplasia. Except for full-thickness oxyntic mucosa inflammation, these features were absent in control cases.
Conclusions.—:
Full-thickness inflammation combined with oxyntic gland loss and ECL cell hyperplasia may help to identify autoimmune gastritis in patients with concomitant H pylori infection.
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