Evidence map›Paper›PMID 33387100›Full record

SynthesisTechniques in coloproctology2021

Simple fistula-in-ano: is it all simple? A systematic review.

F Litta, A Parello, L Ferri, N O Torrecilla, A A Marra, R Orefice, V De Simone, P Campennì, M Goglia, C Ratto

Open access · hybridAbstract readSystematic Review
In one paragraph

Synthesis in Techniques in coloproctology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 2 pooled it
7.1field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 2 syntheses or guidelines pooled it, 50 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Platelet-rich fibrin matrix as treatment for complex anal fistulae: A 3-year experience at a tertiary centre.Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland · 2026
    Article
  4. Article
  5. Core-Out Fistulectomy Combined With Laser Ablation of the Trans-Sphincteric Fistula Tract: A Pilot Study of Efficacy and Safety.Medical science monitor : international medical journal of experimental and clinical research · 2026
    Article
  6. Anal fistulas: do classification systems predict surgical outcomes?Arquivos brasileiros de cirurgia digestiva : ABCD = Brazilian archives of digestive surgery · 2026
    Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Minimal invasiveAnnals of medicine and surgery (2012) · 2025
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Observational
  17. Article
  18. Article
  19. Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 3 institutions in 2 countries.

F Litta *Proctology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8, 00168, Rome, Italy.
A Parello *Proctology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8, 00168, Rome, Italy.
L Ferri *Proctology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8, 00168, Rome, Italy.
N O TorrecillaColorectal Unit, University Hospital Josep Trueta, Girona, Spain.
A A MarraProctology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8, 00168, Rome, Italy.
R OreficeProctology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8, 00168, Rome, Italy.
V De SimoneProctology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8, 00168, Rome, Italy.
P CampennìProctology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8, 00168, Rome, Italy.
M GogliaProctology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8, 00168, Rome, Italy.
C RattoProctology Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli, 8, 00168, Rome, Italy. carloratto@tiscali.it.ORCID http://orcid.org/0000-0002-0556-0037
Agostino Gemelli University Polyclinic · ITHospital Universitari de Girona Doctor Josep Trueta · ESUniversità Cattolica del Sacro Cuore · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSimple anal fistula is one of the most common causes of proctological surgery and fistulotomy is considered the gold standard. This procedure, however, may cause complications. The aim of this systematic review was to assess the surgical treatment of simple anal fistula with traditional and sphincter-sparing techniques.

methodsA literature research was performed using PubMed, Cochrane, and Google Scholar to identify studies on the surgical treatment of simple anal fistulas. Observational studies and randomized clinical trials were included. We assessed the risk of bias of included studies using the Jadad scale for randomized controlled trials, and the MINORS Scale for the remaining studies.

resultsThe search returned 456 records, and 66 studies were found to be eligible. The quality of the studies was generally low. A total of 4883 patients with a simple anal fistula underwent a sphincter-cutting procedure, mainly fistulotomy, with a weighted average healing rate of 93.7%, while any postoperative continence impairment was reported in 12.7% of patients. Sphincter-sparing techniques were adopted to treat 602 patients affected by simple anal fistula, reaching a weighted average success rate of 77.7%, with no study reporting a significant postoperative incontinence rate. The postoperative onset of fecal incontinence and the recurrence of the disease reduced patients' quality of life and satisfaction.

conclusionsSurgical treatment of simple anal fistulas with sphincter-cutting procedures provides excellent cure rates, even if postoperative fecal incontinence is not a negligible risk. A sphincter-sparing procedure could be useful in selected patients.

Indexed as

Fecal IncontinenceRectal FistulaAnal CanalHumansOrgan Sparing TreatmentsQuality of LifeTreatment OutcomeFistula-in-anoFistulotomyIncontinenceSimple anal fistula

Identifiers

PMID33387100
PMCPMC8016761
OpenAlexW3114588800

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.