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ISSN: 1233-9687
Polish Journal of Pathology
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vol. 68
Short communication

Is there a correlation between autoimmune and alkaline gastritis?

Marina Perdiki
George Karamanolis
Ioannis Varbobitis
Evaggelia Kavoura
Ioanna Delladetsima

Pol J Pathol 2017; 68 (1): 73-74
Online publish date: 2017/05/23
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Reactive gastropathy is a common diagnosis in gastric biopsies and reflects the stomach’s response to a variety of irritants including drugs, chronic alcohol consumption as well as reflux of duodenal contents into the stomach. The latter condition, known as alkaline gastritis, has been accepted by the Sydney System as a distinct entity [1]. It results from pyloric sphincter dysfunction caused by pyloroplasty, partial gastrectomy (Billroth I or II) and age-related sphincter soothing.
Studying routine gastric biopsies, we observed rather frequent coexistence of alkaline and autoimmune gastritis. As histological features of the antral mucosa in autoimmune gastritis (AIG) may have been overlooked, we retrospectively studied gastric biopsies in order to identify a possible correlation of alkaline gastritis with autoimmune gastritis, considering that such an association has not yet been reported.
From our archives, we retrieved 1149 gastric biopsies obtained over a one-year period (2014-2015). Biopsies from gastric stumps were not included. All autoimmune gastritis cases were re-evaluated and diagnosis was based on the following appropriate criteria: lesions confined to the corpus/fundus, intense lymphoplasmacytic infiltration of lamina propria, oxyntic glands atrophy, pseudopyloric and intestinal metaplasia [2, 3] as well as enterochromaffin-like (ECL) cell proliferation evaluated on immunohistochemically stained sections for chromogranin A. Histological diagnostic criteria for alkaline gastritis included no or mild inflammation, foveolar hyperplasia, elongation and tortuosity of gastric pits, mucosa villiform transformation, mucin paucity and angulated glands, edema with dilated capillaries and upward extension of smooth muscle fibers from the muscularis mucosa into the lamina propria.
Helicobacter pylori gastritis was found in 228 cases (19.8%), chemical/alkaline gastritis in 88 (7.66%) cases, and non-specific gastritis in 384 (33.4%) cases, whereas no histological changes were observed in 385 (33.5%) cases. Sixty four (5.57%) biopsies carried the diagnosis of autoimmune gastritis. Upon review of these 64 biopsies, atrophy of the oxyntic mucosa was severe in 50, moderate in 10 and mild in 4 cases, while 12 cases (19%) exhibited additional findings of mild and less frequently moderate alkaline gastritis of the antral mucosa (Fig. 1). The latter subgroup had no clinical history of drug or alcohol abuse. No significant correlation was found...

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