There are several categories of anal fistula. These categories include high anal fistula and low anal fistula. High anal fistula is the area where the rectal cavity is located in the upper region. The risk of stool incontinence is very high. Fistula The lower anus is at the bottom of the rectal cavity and the risk of fecal incontinence is lower
The other classification is simple and complex, the complex is called when the fistula channel cuts off all internal and external anal valves, or when fistula treatment is difficult or if the fistula affects the organs adjacent to it. The latter classification is the most common classification of the fistula as it passes through the valves or outside , The first type is fistula in the claws and forms 45% of the species, and reflects the fistula during the internal anal valve, but does not pass through the external anal valve
The second type is the cross-crusher type, which constitutes 45% of all species. It passes through the inner and outer Egyptians together and then into the rectal cavity area to reach the skin of the mechanism. The third type is the type that passes over the syringes. , And the fourth type is the type that passes out of the sphincter and extends from the inner nozzle of the intestine to the immediate rectum and includes the apparatus of the catacombs in full.