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Gastritis (Clinical Presentation (Epigastric pain, Gastric Bleeding,…

- - - - Type B- non immune
        
        Cause is H pylori, alcohol, tobacco and anti-inflammatory medication
        
        High levels of hydrochloric acid is secreted causing ulcers
      - Type A- immune
        
        Loss of T cell tolerance and antibodies develop against hydrogen potassium ATPase.
        
        Loss of intrinsic factor
        
        Gastrin secretion inhibited
      - Type C- lesion
        
        Bile reflux and pancreatic secretions enter the stomach