(redirected from anal fistula)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.


(fĭs`cho͝olə), abnormal, usually ulcerous channellike formation between two internal organs or between an internal organ and the skin. It may follow a surgical procedure with improper healing, or it may be caused by injury, abscess, or infection with penetration deep enough to reach another organ or the skin. When open at only one end it is called an incomplete fistula or sinus. The most common sites of fistula are the rectum and the urinary organs, but almost any part of the body may be affected. Rectal fistulas are often associated with colitis, cancercancer,
in medicine, common term for neoplasms, or tumors, that are malignant. Like benign tumors, malignant tumors do not respond to body mechanisms that limit cell growth.
..... Click the link for more information.
, sexually transmitted diseasessexually transmitted disease
(STD) or venereal disease,
term for infections acquired mainly through sexual contact. Five diseases were traditionally known as venereal diseases: gonorrhea, syphilis, and the less common granuloma inguinale, lymphogranuloma venereum, and
..... Click the link for more information.
, and other disorders. Usually a fistula requires surgery. In horses an abscess on the withers from chafing and infection is termed a fistula.



an abnormal passage between hollow organs or between an organ, body cavity, or focus of disease and the body surface. Usually in the form of a narrow canal lined with epithelium or granulations, it continuously discharges pus, mucus, bile, urine, or feces.

Congenital fistulas, for example, umbilical fistulas, are developmental anomalies. Acquired fistulas result from such chronic inflammations as osteomyelitis, from tumors, or from injuries. Fistulas are usually treated by surgery.

It is sometimes necessary to create artificial fistulas surgically. They may connect hollow organs, in which case they are called internal fistulas, or anastomoses. An example is gastroenteroanastomosis in cicatricial stenosis of the outlet of the stomach.

Gastrostomy is the establishment of an external fistula, or stoma, for artificial feeding. External fistulas also permit the discharge of urine or feces. For example, cystostoma is a fistula of the urinary bladder formed when the urethra is compressed by a tumor. With external fistulas, care must be taken to avoid irritating or infecting the surrounding skin.


Struchkov, V. I. Gnoinaia khirurgiia, 2nd ed. Moscow, 1967.


An abnormal congenital or acquired communication between two surfaces or between a viscus or other hollow structure and the exterior.


In ancient Roman construction, a water pipe of lead or earthenware.


Pathol an abnormal opening between one hollow organ and another or between a hollow organ and the surface of the skin, caused by ulceration, congenital malformation, etc.
References in periodicals archive ?
All the patients who presented with low fistula in ano between the ages of 30 to 60 years, irrespective of the gender were included; while patients having high anal fistula, patients who have recurrent fistula in ano, patients with systemic immuno-compromised states like diabetes mellitus, uremia and malignancy, patients who were using steroids (due to poor healing rate and resulting muscular atrophy) and anemic patients were excluded.
It was the procedure that led us to determine anal fistula as a cause in our followed by cutaneous infections (furuncle) and urinary infections respectively in 129% and 968% patients respectively.
According to Park [8] the Anal Fistula can be Classified into the Following Types
Material and Methods: Total 60 patients of low anal fistula were enrolled in this study after informed consent and ethical approval.
Anal Fistula Plug has a success rate of between 40-80% as reported in various studies but Cleveland Clinic from United States has reported success rate of just 16%.
A fistula-in-ano or anal fistula is a chronic abnormal communication, usually lined to some degree by granulation tissue, which runs outwards from the anorectal lumen (The internal opening) to an external opening on the skin of the perineum or buttock (Or rarely, in women, to the vagina).
Implantation metastasis of colorectal cancer in an anal fistula is very rare.
Two of the patients had previously been treated for pulmonary TB, but only 1 of the patients had radiological evidence of active pulmonary disease at the time of presentation with anal fistula.
Objective: To compare the anal fistula plug using surgical versus cutting seton in the treatment of high trans-sphincteric anal fistula, in terms of frequency of fistula closure.
He was making a presentation on Role of MRI Perineum in Complex Anal Fistula at the 9th Annual Surgical Week for Colorectal Disease at the JPMC on October 2nd 2014.