Anal fistula, plastic closure with rectal mucosa advancement flap - general and visceral surgery

First inspect the non-infected healed fistula with its previously inserted seton. Probe the fistula through its external opening and perform a digital rectal examination.

Now start with the funnel-shaped excision of the fistula along its track.

Insert the anal retractor and dissect the internal opening of the fistula. Follow the fistula track and sparingly excise the internal fistula opening.