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. 2022 Mar 1;117(3):413-423.
doi: 10.14309/ajg.0000000000001625.

Prospective Endoscopic Activity Assessment for Eosinophilic Gastritis in a Multisite Cohort

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Prospective Endoscopic Activity Assessment for Eosinophilic Gastritis in a Multisite Cohort

Ikuo Hirano et al. Am J Gastroenterol. .

Abstract

Introduction: Eosinophilic gastritis (EG) is a chronic inflammatory disease of the stomach characterized by eosinophil-predominant gastric mucosal inflammation and gastrointestinal symptoms. The aim of this study was to prospectively evaluate endoscopic features in a large series of children and adults with EG to better understand the endoscopic manifestations and develop a standardized instrument for investigations.

Methods: Data were prospectively collected as part of the Consortium for Eosinophilic Gastrointestinal Disease Researchers, a national collaborative network. Endoscopic features were prospectively recorded using a system specifically developed for EG, the EG Endoscopic Reference System (EG-REFS). Correlations were made between EG-REFS and clinical and histologic features.

Results: Of 98 patients with EG, 65 underwent assessments using EG-REFS. The most common findings were erythema (72%), raised lesions (49%), erosions (46%), and granularity (35%); only 8% of patients with active histology (≥30 eosinophils/high-power field) exhibited no endoscopic findings. A strong correlation between EG-REFS scores and physician global assessment of endoscopy severity was demonstrated (Spearman r = 0.84, P < 0.0001). The overall score and specific components of EG-REFS were more common in the antrum than in the fundus or body. EG-REFS severity was significantly correlated with active histology, defined by a threshold of ≥30 eosinophils/high-power field (P = 0.0002).

Discussion: Prospective application of EG-REFS identified gastric features with a strong correlation with physician global assessment of endoscopic activity in EG. Endoscopic features demonstrated greater severity in patients with active histology and a predilection for the gastric antrum. Further development of EG-REFS should improve its utility in clinical studies.

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Figures

Figure 1.
Figure 1.
Classification and severity assessment of endoscopically identified, gastric features of eosinophilic gastritis that include erosion/ulceration (A), granularity (B), raised lesions/nodules (C), erythema (D), thickened folds (E), and friability (F). Pyloric stenosis was also included as a feature but is not depicted.
Figure 1.
Figure 1.
Classification and severity assessment of endoscopically identified, gastric features of eosinophilic gastritis that include erosion/ulceration (A), granularity (B), raised lesions/nodules (C), erythema (D), thickened folds (E), and friability (F). Pyloric stenosis was also included as a feature but is not depicted.
Figure 1.
Figure 1.
Classification and severity assessment of endoscopically identified, gastric features of eosinophilic gastritis that include erosion/ulceration (A), granularity (B), raised lesions/nodules (C), erythema (D), thickened folds (E), and friability (F). Pyloric stenosis was also included as a feature but is not depicted.
Figure 1.
Figure 1.
Classification and severity assessment of endoscopically identified, gastric features of eosinophilic gastritis that include erosion/ulceration (A), granularity (B), raised lesions/nodules (C), erythema (D), thickened folds (E), and friability (F). Pyloric stenosis was also included as a feature but is not depicted.
Figure 1.
Figure 1.
Classification and severity assessment of endoscopically identified, gastric features of eosinophilic gastritis that include erosion/ulceration (A), granularity (B), raised lesions/nodules (C), erythema (D), thickened folds (E), and friability (F). Pyloric stenosis was also included as a feature but is not depicted.
Figure 2.
Figure 2.
Prevalence of specific endoscopic features of EG-REFS. Erythema was the most commonly identified gastric abnormality followed by raised nodules and erosion/ulceration. The prevalence and severity assessment may have been affected by the active use of medical or dietary therapies in most patients.
Figure 3.
Figure 3.
Endoscopic activity of eosinophilic gastritis measured by the composite EG-REFS strongly correlates with physician global assessment of endoscopic severity. (Spearman correlation r 0.84, P<0.0001)
Figure 4.
Figure 4.
Endoscopic activity of eosinophilic gastritis measured by EG-REFS based on region of the stomach. Pairwise comparisons demonstrated significant differences in EG-REFS scores between the antrum, body and fundus with significantly greatest severity in the antrum (P<0.001).
Figure 5.
Figure 5.
Endoscopic activity of eosinophilic gastritis measured by the composite EG-REFS shows modest correlation with disease duration (Spearman correlation 0.48, P<0.001)

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