PMNs

• acute hemorrhagic gastritis
• chronic active gastritis
  • H pylori
  • Crohns disease
  • other infection: CMV, others
• peptic ulcer

Chronic inflammation

• H pylori
• lymphoma
• atrophic gastritis
• collagenous gastritis

Granuloma

• Crohns disease
• sarcoidosis
• foreign body granuloma
• infection, H pylori
• vasculitis

Eosinophils

• eosinophilic gastroenteritis
• parasite
• reactive to other injury

See polyp ddx