Understanding the different types of anal fistula surgery with Dr. Rananjoy Dutta

Noticing recurring pus discharge or pain near your anus?


If you are experiencing persistent swelling, irritation, discharge, or a painful lump near your anus, it might be more than just a skin issue.

These could be signs of an anal fistula, a small tunnel that forms between the inside of the anus and the surrounding skin. It often starts with an infection in a small anal gland that didn’t heal properly.

Let’s break down what this condition means and how Dr. Ranajoy Dutta, a leading anal fistula surgeon in Kolkata, approaches its treatment, especially through surgery.

What are the different types of fistula?

Anal fistulas aren’t all the same. Depending on their location and path, they are classified as:

  • Intersphincteric fistula – Most common, runs between internal and external anal sphincter(circular muscles that help control bowel movements by opening and closing the anus).

  • Transsphincteric fistula – Passes through both sphincter muscles.

  • Suprasphincteric fistula – Starts above the external sphincter and loops around.

  • Extrasphincteric fistula – Rare and more complex, extending outside the sphincter muscles.

Each type affects how difficult the treatment will be and what surgical method is best suited.

How do I know if my fistula is simple or complex?

Simple fistulas are usually short, with a single tract and no signs of infection or complications. These are easier to treat and heal quicker.

Complex fistulas, on the other hand, may involve multiple tracts, pass through significant muscle, or be associated with conditions like Crohn’s disease. If you have had repeated abscesses, multiple openings, or prior failed surgeries, your fistula might be complex.

A proper diagnosis using imaging like MRI or fistulogram) helps surgeons decide the nature of your fistula.

What are the surgical approaches for fistula?

There are a range of surgical treatments tailored to the type and complexity of your anal fistula. Among them, Fistulotomy and Seton Placement are the most commonly used and effective procedures.

Fistulotomy 

This is the best for treating simple anal fistulas. In this procedure, the entire fistula tract is opened up and laid flat, allowing it to heal naturally from the inside out. 

It’s straightforward, effective, and has a high success rate with minimal recurrence, especially when the fistula does not involve much of the sphincter muscle.

Seton Placement 

When the fistula is deep, involves significant muscle, or has multiple tracts, a Fistulotomy could risk damaging the sphincter and causing incontinence. 

In such cases, a Seton, a soft surgical thread, is placed in the fistula tract to keep it open and allow drainage, reducing infection and tension. It also prepares the area for future surgery if needed and helps protect muscle function.

Other surgical options include:

  • LIFT Procedure – A muscle-sparing approach that closes the internal opening of the fistula without cutting the sphincter.

  • Advancement Flap Surgery – Suitable for recurrent or high-risk cases where preserving anal control is crucial. A flap of healthy tissue is used to cover the internal opening.

  • Laser Surgery & VAAFT – These are minimally invasive and newer techniques that use modern tools to treat the fistula with faster recovery and less post-op pain.

Dr. Ranajoy Dutta evaluates each case carefully to choose the safest and most effective treatment with the goal of complete healing and preserved anal function.

Conclusion

Anal fistulas can be stubborn and uncomfortable, but the right treatment can offer lasting relief. Whether it’s a simple case or a more complex fistula, timely surgical intervention can prevent complications and improve your quality of life.


Don’t wait for the discomfort to worsen

Book a consultation with Dr. Ranajoy Dutta, the best anal fistula surgeon in Kolkata and take the first step towards healing.

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