The appendix is a normal true diverticulum of the cecum that is prone to inflammation (appendicitis).

Inflammation

  • DD:
    • Yersinia enterocolitica (pseudoappendicitis)
    • Ectopic pregnancy
    • Period pain
    • Meckel diverticulum
  • Most cases are associated with luminal obstruction
    • A hard piece of feces, mucous, gallstone, or tumor
    • As with every obstructed luminal organ -- a bacterial infection, followed by an immune

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