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Fistula In Ano

Fistula In Ano


An anal fistula is a small tunnel that develops between the end of the bowel  (internal opening) and the skin near the anus (external opening). They’re usually the result of an infection near the anus causing a collection of pus (abscess) in the nearby tissue. When the pus is not drained away early, it can leave a small channel behind called a fistula.

Types of fistula include:

  • Low fistula: which does not involve the anal sphincter and the external opening is close to the anus.
  • High fistula: which involves or runs through the anal sphincter and mostly, the external opening is far from the anus.
  • Branching fistulas, which are very complex and have multiple openings.

Management is fistulotomy but in high fistula, we need to delineate the tract and tie it using setone suture, which will be tightened on stages until the fistula heals. New way of management is taking over in these complex fistulas is by laser fistulotomy.