Etiology-based classification of gastropathy and gastritis

• Bile reflux
• Alcohol
• NSAIDs
• Iron salts
• Other agents (eg, alendronate, sodium phosphate)

Vascular gastropathy

• Portal hypertensive (congestive) gastropathy
• Gastric antral vascular ectasia

Ischemic gastropathy

• Cocaine
• Hypovolemia
• Sepsis
• Burns
• Trauma, mucosal prolapse

• Helicobacter pylori
• Pyogenic bacteria (phlegmonous gastritis)
• Mycobacterial
• Syphilitic
• Viral
• Parasitic
• Fungal

Autoimmune gastritis

Granulomatous disease

• Crohn disease
• Sarcoidosis

Uncertain etiology

• Lymphocytic gastritis
• Collagenous gastritis
• Eosinophilic gastritis