Autoimmune gastritis: assessment of OLGA and OLGIM staging systems.

BACKGROUND: Autoimmune gastritis present a risk of cancer related to atrophy and intestinal metaplasia. Two recent classifications OLGA (Operative Link on Gastritis Assessment) and OLGIM (Operative Link on Gastritic Intestinal Metaplasia assessment) have been proposed to reveal the high progressive risk forms (stages III and IV).

AIM: To evaluate the OLGA and OLGIM staging systems in chronic autoimmune gastritis.

METHODS: A descriptive single institution study of 30 cases of autoimmune gastritis. was performed over a 4-year period. The revaluation of atrophy and intestinal metaplasia, of gastric antrum and corpus, allowed to identify respectively the stages of OLGA and OLGIM systems.

RESULTS: Our autoimmune gastritis were at high-risk stages in 26,5% of cases  according to two classifications. 95% of low-risk gastritis acoording to OLGA staging presented moderete to severe corpus atrophy. A significant association was present between high-risk gastritis according to OLGA staging and neuroendocrine hyperplasia. Both OLGA and OLGIM systems showed a highly significant positive correlation between them with a mismatch at 2%.

CONCLUSIONS: The OLGA and OLGIM staging systems in autoimmune gastritis, allow probably selection of high risk forms of chronic gastritis requiring convenable care.