Anal fistula, there is more than meets the eye!

Results at one year of the TROPIS technique in the treatment of complex anal fistula

INTRODUCTION

It is a priority to find surgical techniques that guarantee acceptable healing rates without sequelae in the treatment of complex anal fistula. The concept of the deep intersphincteric space as the origin of perianal sepsis has provided a new perspective, allowing the emergence of techniques such as TROPIS (Transanal Opening of Intersphincteric Space), with few published series to date. The aim of this study is to evaluate the healing rate and complications one year after the TROPIS technique as a treatment for complex anal fistula without hospitalization.

METHOD

Prospective, observational study from January 2021 to January 2023. Patients with complex anal fistulas who met the inclusion criteria were treated using the TROPIS technique. A one-year follow up review was conducted, assessing healing rates, recurrence, continence, and complications.

RESULTS

A total of 23 patients with cryptoglandular complex perianal fistula were included (87% male, mean age 54.7 ± 9.6 years). 78.3% were treated for recurrent fistulas with an average of 3.3 ± 3.2 previous interventions. At one month, 82.6% of the patients had complete healing. At three, six, and twelve months, complete healing occurred in 63.6%, 61.9%, and 55.6%, respectively. One patient developed an abscess at one month. Continence was altered in 8.7%.

CONCLUSIONS

The treatment of cryptoglandular complex anal fistula with this procedure was safe and showed acceptable healing rates.

Perianal Fistula; from Etiology to Treatment - A Review

Anal fistula has been a challenging clinical issue for years due to its complex pathogenesis. The risk of frequent recurrence and incontinence complicates long-term treatment. Recent scientific literature has reviewed new techniques used for anal fistula treatment in recent years, assessing the advantages and disadvantages of each based on clinical outcomes. Although surgery is the main method used to treat anal fistula, there is no simple technique that can completely heal complex anal fistula. The surgical treatment should consider the healing outcome and the protection of anal function comprehensively. Several innovative techniques have emerged in recent years, such as combined techniques based on drainage seton and LIFT-plug, which appear to be relatively effective therapies. However, more multi-center prospective trials with long-term follow-up are needed to validate their effectiveness. In some situations, medical treatment may also be considered.