Evidence map›Paper›PMID 40407900›Full record

ArticleInternational journal of colorectal disease2025

Impact of surgical case load on recurrence rates in pilonidal sinus disease: a cross-study data synthesis.

Dietrich Doll, Matthias Maak, Ida Kaad Faurschou, Theo Hackmann, Christina Oetzmann von Sochaczewski, Myriam Braun-Münker, Igors Iesalnieks, Susanne Haas, Pilonidal Network for Expertise, Research and Development (PiloNERDs International)

Abstract read
In one paragraph

Article in International journal of colorectal disease, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
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

2 citing papers in PubMed.

  1. Article
  2. 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

9 authors.

Dietrich DollDepartment of Procto-Surgery & Pilonidal Sinus, St. Marienhospital Vechta, Academic Teaching Hospital of the MHH Hannover, Vechta, Germany.
Matthias MaakDepartment of Surgery, University Hospital Erlangen of the Friedrich-Alexander University Erlangen-Nuremberg, Krankenhausstraße 12, 91054, Erlangen, Germany. matthias.maak@uk-erlangen.de.
Ida Kaad FaurschouDepartment of Surgery, Randers Regional Hospital, Randers, Denmark.
Theo HackmannDepartment of Surgery, University Hospital Erlangen of the Friedrich-Alexander University Erlangen-Nuremberg, Krankenhausstraße 12, 91054, Erlangen, Germany.
Christina Oetzmann von SochaczewskiDepartment of Surgery, University Hospital of Bonn, Venusberg-Campus Bonn, Bonn, Germany.
Myriam Braun-MünkerDepartment of Food Technology, Fulda University of Applied Sciences, Leipziger Straße 123, 36037, Fulda, Germany.
Igors IesalnieksDepartment of Surgery, Evangelisches Krankenhaus Kalk, Cologne, Germany.
Susanne HaasDepartment of Surgery, Randers Regional Hospital, Randers, Denmark.
Pilonidal Network for Expertise, Research and Development (PiloNERDs International)

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeA higher surgical caseload has been associated with better outcomes in various diseases. However, this relationship has not yet been studied for Pilonidal Sinus Disease (PSD). This study aimed to examine the impact of annual PSD surgery volumes on recurrence rates (RR).

methodsA comparative cross-study data synthesis was conducted, including 1074 studies with 130,599 patients, focusing on PSD recurrence rates. Studies were categorized based on annual case load (ACL) into three groups: fewer than 10 operations per year (group 1), 10-30 operations per year (group 2), and 30 or more operations per year (group 3). Kaplan-Meier analyses were performed to evaluate recurrence rates, with additional stratification by study design (randomized controlled trial (RCT) or non-RCT) and surgical treatment type.

resultsIn randomized controlled trials (RCTs) of primary open treatment, group 1 (< 10 surgeries/year) had a 5-year recurrence rate of 23.5%, while group 2 (10-30 surgeries/year) had a rate of 12.5% (p < 0.0001). No data was available for group 3. For primary midline closure (pmc), the 5-year recurrence rates were 14.8% for group 1, 26.3% for group 2, and 12.8% for group 3. Non-RCT studies generally showed decreasing recurrence rates with higher surgical caseloads for most treatment types. However, midline closure surgery showed no significant improvement in recurrence rates with increased caseloads.

conclusionThe study demonstrates that higher surgical caseloads significantly reduce PSD recurrence rates, with notable benefits observed for centers treating 30 or more patients annually. Specialization in high-volume centers may lead to improved outcomes for PSD, particularly in flap surgeries. However, midline closure surgery continues to show persistently high recurrence rates, regardless of caseload.

Indexed as

Pilonidal SinusWorkloadCross-Sectional StudiesHumansRecurrenceTreatment OutcomeCase loadIncidenceLong term recurrence rateObservation biasOperations per yearPilonidal sinusTherapy

Identifiers

PMID40407900
PMCPMC12102125

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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.