Gastritis classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Aravind Reddy Kothagadi M.B.B.S[2]

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	Varioliform (endoscopic)
		Gluten	Celiac disease-associated
		Drug (ticlopidine)
		H. pylori
	Noninfectious granulomatous	Crohn's disease
		Sarcoidosis
		Granulomatosis with polyangiitis and other vasculitides
		Foreign substances
		Idiopathic	Isolated granulomatous
	Eosinophilic	Food sensitivity	Allergic
		Other allergies
	Other infectious gastritides	Bacteria (other than H. pylori)	Phlegmonous
		Viruses Fungi Parasites