Appendix is a small organ that located in the abdomen and near the large intestine. Appendectomy is the surgical removal of the appendix when an infection has made it inflamed and swollen. This infection, called appendicitis, is considered an emergency because it can be life threatening if untreated. Occasionally, an inflamed appendix bursts after a day of symptoms. So it's very important to have it removed as soon as possible. Fortunately, appendectomy is a common procedure and complications are rare. And if appendicitis is promptly diagnosed and an appendectomy is performed, most patients recover quickly.