Table I.

Gastritis Classification.

Classification of Gastritis
Acute	Drugs, Stress induced, Uremia, Ischemia, Shock, Corrosive agents, Radiation, Certain food, Sepsis, Trauma, Certain infection, Acute alcoholism, Severe burns, Alkaline-Bile reflux, Major surgery Multiorgan failure, Portal hypertension, Congestive heart failure, Respiratory failure, Increase intracranial pressure.
Reactive (chemical) gastropathy	Endotossic (Alkaline Reflux-Bile Reflux, Uremic) Exotoxic (Drugs-NSAIDs, alchol, etc.) Stress induced
Chronic	Helicobacter pylori (and H. Heilmannii) Autoimmune Hp-Negative Cronic Gastritis
Special	Lymphocytic Collagenous Eosinophilic (food induced) Radiation Graft versus host disease (GVHD) Bacterial (Syphilis, Tubercolosis, Rickettsial Infections) Viral gastritis (CMV and HSV) Fungal gastritis (Candida, Aspergillus, Mucor, Coccidioides, Histoplasma, Cryptococcus neoformans, Pneumocystis carinii and Torulopsis glabrata) Parasitic Gastritis (Anisakis, Cryptosporidium, Ascaris lumbricoides, Giardia, Toxoplasma, Schistosoma etc.)
Granulomatous	Idiopathic Crohn Disease Sarcoidosis Food and Barium Granulomas
Hypertrophic gastropathies	Ménétrier Disease, Zollinger-Ellison Syndrome, Hypertrophic, Hypersecretory Gastropathy (with protein loss; Hp-associated)
Gastric vasculopathies	Ischemic, Antral Vascular Ectasia (Watermelon Stomach), Portal Hypertensive Gastropathy (Congestive Gastropathy), Varices, Angiodysplasia, Caliber-Persistent Artery (Dieulafoy Lesion); Hemodialysis-Associated Telangiectasias
Gastric involvement in systemic diseases	Inflammatory Bowel Disease, Amyloid, Diabetes, Mastocytosis, Sjögren Syndrome, Hypercalcemia, Siderosis