Evaluation of the outcomes of fistulotomy with primary sphincter reconstruction in the management of high trans-sphincteric fistula and supra-sphincteric fistula-in-ano : A single-center prospective cohort study.

Background: Supra-sphincteric and high trans-sphincteric fistula are very challenging procedures for both the patient and the surgeon. We aimed to evaluate the outcomes of anal sphincter repair in the management of supra-sphincteric and high trans-sphincteric fistula-in-ano in terms of postoperative wound infection, bleeding, incontinence to flatus or stool, and recurrence within 1 year.

Patients and methods: This single-center prospective cohort trial conducted from June 2020 to December 2023 at the Ain Shams University Hospitals included 20 patients who presented with supra-sphincteric or high trans-sphincteric fistula. There were nine (45%) male and 11 (55%) female patients, with a mean age of 41.5 years postoperatively.

Results: The mean duration of the procedure was 90.3 min (SD ± 11.9). During the first 2 weeks, ten (50%) patients scored their postoperative pain as mild, eight (40%) as moderate, and two (10%) as severe. Wound infection occurred in two (10%) patients and postoperative bleeding in three (15%) patients in the form of spotting after defecation. There were no cases of incontinence to stool. However, there were three (15%) cases of incontinence to gases. There were two cases (10%) of recurrence at the 1‑year follow-up. Postoperative patient satisfaction was assessed on a 5‑point Likert scale after 2 weeks: One patient (5%) was very dissatisfied, three (15%) patients were dissatisfied, and two (10%) patients were unsure, while five (25%) patients were satisfied and nine (45%) were very satisfied.

Conclusion: Immediate sphincter repair in supra-sphincteric and high trans-sphincteric fistula through a lay-open procedure was determined to be safe, easier than classic operations, and associated with a low incidence of recurrence at the 1‑year follow-up and a high quality of life.