Gastritis classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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Overview

Gastritis may be classified according to chronicity, into two categories: acute and chronic. Gastritis may also be classified by pathology/pathophysiology into subtypes by proposed classification systems such as the updated Sydney system [*REF] or the Operative Link for Gastritis Assessment [OLGA] staging system [*REF].

Classification

Classification and grading of Gastritis: Updated Sydney System
Type of Gastritis		Etiology	Gastritis synonyms
Non-atrophic		Helicobacter pylori Other factors	Superficial Diffuse antral gastritis (DAG) Chronic antral gastritis (CAG) Interstitial - follicular Hypersecretory Type B*
Atrophic	Autoimmune	Autoimmunity	Type A* Diffuse corporal Pernicious anemia-associated
	Multifocal atrophic	Helicobacter pylori	Type B*, type AB*
		Dietary	Environmental
		Environmental factors	Metaplastic
Special forms	Chemical	Chemical irritation	Reactive
		Bile	Reflux
		NSAIDs	NSAID
		Other agents	Type C
	Radiation	Radiation injury
	Lymphocytic	Idiopathic? Immune mechanisms Gluten Drug (ticlopidine) H. pylori	Varioliform (endoscopic) Celiac disease-associated
	Noninfectious granulomatous	Crohn's disease Sarcoidosis Granulomatosis with polyangiitis and other vasculitides Foreign substances Idiopathic
	Eosinophilic	Food sensitivity Other allergies	Allergic
	Other infectious gastritides	Bacteria (other than H. pylori) Viruses Fungi Parasites	Phlegmonous

Classification and grading of gastritis: Updated Sydney System
Type of gastritis		Etiologic factors	Gastritis synonyms
Nonatrophic	Helicobacter pylori Other factors	Superficial Diffuse antral gastritis (DAG) Chronic antral gastritis (CAG) Interstitial - follicular Hypersecretory Type B*