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The appendix is a small finger-shaped tube that branches off the first part of the large intestine. The appendix can become inflamed or infected causing pain in the lower right part of the abdomen.

Review Date 1/28/2016

Updated by: Subodh K. Lal, MD, gastroenterologist at Gastrointestinal Specialists of Georgia, Austell, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.