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Often people have their appendix removed (called an appendectomy) when they are diagnosed with acute appendicitis. This is when the appendix is inflamed and the patient experiences a great deal of abdominal pain. The pain starts vaguely/diffusely around the belly button, and then moves to a particular point between the belly button and the right hip bone (this halfway point is called McBurney's Point). One of the key questions to ask a patient with hypothesized appendicitis is whether or not the pain moved. Appendicitis is considered a medical emergency because without treatment it can lead to shock if the appendix were to rupture.