Classification of Gastritis
Non-atrophic: Helicobacter pylori
Atrophic
 • Autoimmune: Autoimmunity
 • Multifocal atrophic: H. pylori, environmental insults
Special forms
 • Chemical: NSAIDs, bile?, other agents
 • Radiation Injury
 • Lymphocytic: Gluten (coeliac disease), H. pylori, idiopathic, drugs
 • Non-infectious granulomatous: Crohn's disease, sarcoidosis, Wegener's granulomatosis and other vasculitides, foreign substances, idiopathic
 • Eosinophilic: Food sensitivity?, other allergies
 • Other infections: Bacteria other than H. pylori (other gastric helicobacters, mycobacteria and syphilis), viruses (cytomegalovirus), fungi (Candida spp., Histoplasma capsulatum, Mucoraceae)

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