According to the American Medical Association and the American College of Surgeons, some of the most common surgical operations performed in the United States include the following:

• appendectomy (Learn About Appendicitis)
  An appendectomy is the surgical removal of the appendix, a small tube that branches off the large intestine, to treat acute appendicitis. Appendicitis is the acute inflammation of this tube due to infection.
   
• cholecystectomy (Learn About Cholecystectomy)
  A cholecystectomy is surgery to remove the gallbladder (a pear-shaped sac near the right lobe of the liver that holds bile). A gallbladder may need to be removed if the organ is prone to troublesome gallstones, if it is infected, or becomes cancerous.
   
• hemorrhoidectomy
  A hemorrhoidectomy is the surgical removal of hemorrhoids, distended veins in the lower rectum or anus.
   
• partial colectomy
  A partial colectomy is the removal of part of the large intestine (colon) which may be performed to treat cancer of the colon or long-term ulcerative colitis.

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