What exactly is a fistula?

Abnormal Connection. An abnormal connection between to organs or vessels. Example: entero-cutaneous fistula- an connection between the bowel and the skin. These are typically caused by diseases of the bowel. Example: arterio-venous fistula- a connection between an artery and a vein. These are created surgically to provide dialysis.

Related Questions

What is exactly is an anal abscess/fistula?

An infection/tear . An anal fistula is an abnormal connection between the anus and something else, such as the skin or bladder. This is called an abscess if an infection develops. An abscess can occur without a fistula. Read more...
An infection. In the perianal region, usually derived from the anal glands inside the rectum. A fistula is an abnormal communication between two organs, in this case the rectum and the skin outside the anus. Both require evaluation and often surgery to permanently resolve and prevent recurrences or complications. Read more...
Anal Abscess. An anal abscess is a painful condition in which a collection of pus develops near the anus. Most anal abscesses are a result of infection from small anal glands. http://www.webmd.com/a-to-z-guides/anal-abscess. Read more...