Anal fistula-types

The current classification of anal fistula is not unified, However, the most commonly used classifications as follows:
(1) Sumikoshi fortunate men Classification: (1979)
(B) National Conference on the Coordination of intestinal anal developed classification
Domestic commonly used by the anorectal by the 1975 National Conference on the Coordination of the development of diagnostic criteria for classification anal fistula.
1. Points on the source of the disease
Septic anal fistula and tuberculosis anal fistula.
2. According to the degree of lesion
① simple anal fistula
A. Anal fistula simple low: only one fistula, one of the mouth and the mouth of a completely fistula. In the teeth of the mouth, sphincter pipeline through shallow or superficial following.
B. Simple anal fistula high: only one fistula, in the mouth or teeth in the tooth above the line, external sphincter deep pipeline acts above, or to cross over to straight gut, and not through the muscle (including the blind and total internal fistula fistula).
② complexity of the anal fistula
A. Low complexity of the anal fistula: in the teeth of the mouth, external sphincter pipeline deep below, and has a tube and cavity, and the mouth of two or more channels (including multiple high fistula in the mouth and without a high cavity, according to the scope of the disease around the anus size can be divided into three degrees, 1 degree <1> 1 / 4 to 1 / 2, third degree> 1 / 2.
B. high complexity of the anal fistula: with more than two-tube and pipe or cavity, through its competent Road sphincter deep above or through the rectum Central, one or more of mouth, rectum ring in the mouth over. According to violations of anorectal diseases scope size, and low complexity of the anal fistula, can be further divided into three degrees.
③ horseshoe Anal Fistula
Another former place after place after place at the Horseshoe anal fistula.
A. front horseshoe anal fistula: fistula Central Bank, in the anus, mouth spread to both sides of the front vaginal fistula and perineum, anus, mouth if within the margin of 2.5 cm, with the mouth in the contralateral. If the 2.5 cm or more, which I may posterior.
B. After-Horseshoe anal fistula: fistula ring, and pipelines on both sides of the anus after proliferation, further away from the anal margin of the deeper, the majority of the population, the majority of fistula lumen one another, in most of mouth within the anus posterior.
C. Anal fistula horseshoe-around: Ring around the anal fistula, Perianal lap, I have, at least several, while dozens more, large areas have been violated, plumbing acts complex.
(C)史兆superoxide Professor Classification
According fistula around with anorectal space, as well as pathological changes and at the convenience of the following types:
① under the skin or mucosa Anal Fistula
A. subcutaneous fistula, refers to the mouth in the primary sinus anus, anal fistula in the possession or under the skin around the anus under the skin of the anal fistula in shallow, very close to the mouth from the anus.
B. submucosal fistula, in the mouth means a primary sinus anus, anal fistula in the mucosa, skin, no openings.
② between internal and external anal sphincter fistula
A. fistula between low muscle: refers to the mouth in anal sinus, fistula wear to internal and external anal sphincter gap, to pass through the skin of the anal sphincter, the anal fistula. The fistula toward straight, the only one in the mouth, called Simple low intramuscular fistula. And to bend, a branch of the low complexity of the muscle called the Intergovernmental fistula.
B. high intramuscular fistula: refers to the mouth in anal sinus, internal and external sphincter fistula between upward to the development of anal fistula.
③ levator ani muscle of anal fistula
A. muscle of low fistula: refers to the anal sinus in the mouth, through the anal sphincter fistula shallow of anal fistula. The side of the development gap to the ischial simple low muscle, known as fistula. Clearance to the development of bilateral ischial rectum, formed as horseshoe shape, anus, the mouth on both sides have called the low complexity of the muscle of fistula, called low Horseshoe - shaped anal fistula.
B. high muscle, fistula: refers to the anal sinus in the mouth, through the anal sphincter fistula deep the anal fistula. Gap ischial rectum to the side of the development, known as the Simple muscle high fistula, to the secondary side of the ischial rectum gap known as the complexity of the development of muscle, high fistula, also known high Horseshoe - shaped anal fistula.
④ levator ani muscle, anal fistula
In referring to the mouth or anus sinus anorectal dentate line side wall, fistula by rectal pelvic muscle clearance to enter space, through the levator ani muscle high of anal fistula.