Appendicitis is an inflammation of the appendix, a 3 1/2-inch-long tube of tissue that extends from the large intestine. No one is absolutely certain what the function of the appendix is. One thing we do know: We can live without it, without apparent consequences.
Appendicitis occurs when the appendix becomes blocked, often by stool, a foreign body, or cancer. Blockage may also occur from infection, since the appendix swells in response to any infection in the body. << Additional Resources: WebMD
Surgery to remove the appendix, which is called an appendectomy, is the standard treatment for appendicitis.
If appendicitis is even suspected, doctors tend to err on the side of safety and quickly remove the appendix to avoid its rupture. If the appendix has formed an abscess, you may have two procedures: one to drain the abscess of pus and fluid, and a later one to remove the appendix. << Additional Resources: WebMD