الفهرس | Only 14 pages are availabe for public view |
Abstract Anal fistula, or fistula-in-ano, is a chronic abnormal communication between the epithelialised surface of the anal canal and (usually) the perianal skin. Perianal fistulas occur in approximately 10 of 100,000 persons, with a two fold to four fold male predominance. In our study, the incidence was 4. 95 %. This means high incidence of perianal fistula among Assiut and Upper Egypt population. The male to female ratio was 2.88:1. Most patients with anal fistula are between the ages of 20 and 60 with mean age of 40 in both genders. In our study, the age of the patients ranged from 16 years to 60 years. Incidence is low in both sexes below 20 years and after 50 years of age. Peak occurrence was noted between 25 to 40 years. The mean age was 33 years. This is quite comparable to the previous studies. Anal fistulae originate from infection of the anal glands, which are located between the two layers of the anal sphincters and which drain into the anal canal. If the outlet of these glands becomes blocked, an abscess can form which can eventually point to the skin surface. The tract formed by this process is the fistula. The incidence of a fistula-in-ano developing from an anal abscess ranges from 26% to 38%. In this study, twenty-eight of 70 patients gave history of incision and drainage of a perianal abscess (40 %). |