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Gastritis (Clinical Presentation (Abdominal pain (upper) (Worse laying…

- - - - Drugs
      - H. Pylori
      - NSAIDs
      - Increased gastric acid production
  - - - Immune
      - Fundal
      - Rare
      - T cell tolerance decreases and autoantibodies develop to gastric H+-K+ ATPase
      - Loss of parietal cells, reduced acid and intrinsic factor secretion
      - decreased Vitamin B12 absorption = Pernicious anemia
      - Stomach atrophy
    - - Nonimmune
      - Antrum
      - More common
      - Higher acid levels
      - H. pylori
      - Alcohol use, NSAIDS, tobacco use
      - Can lead to gastric cancer
      - Duodenal ulcers