If the appendix ruptures and walls off into an abscess
, it may not require emergency surgery; if the abscess
is small enough, antibiotics alone may do the trick. If it's larger, then it may need draining. Under these circumstances, it may be elected to put off the actual removal of the appendix until the infection subsides; that way, you don't risk spreading the infection around within the abdomen. After it subsides, the appendix is later removed, to prevent the whole thing from happening again.