Anorectal abscess and fistula-in-ano.

The etiology of anorectal abscess and fistula-in-ano is discussed. The anatomy, which is vital to the understanding and treatment of the above, is reviewed, with two of the more common classifications of fistula-in-ano presented. The different methods of treating each are discussed, and some of the common complications of the procedure are listed. A true understanding of the disease process and anatomy is needed before treatment of fistulous abscesses is begun, but, with it, successful outcomes will occur in most cases.