Evidence map›Paper›PMID 35301513›Full record

SynthesisBJS open2022

Prognostic relevance of the revised R status definition in pancreatic cancer: meta-analysis.

Carl Stephan Leonhardt, Willem Niesen, Eva Kalkum, Rosa Klotz, Thomas Hank, Markus Wolfgang Büchler, Oliver Strobel, Pascal Probst

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BJS open, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing 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

20 citing papers in PubMed.

  1. Trial
  2. Article
  3. Pancreatic cancer.Nature reviews. Disease primers · 2026
    Review
  4. Article
  5. Article
  6. Review
  7. Impact of resection margin status on survival in gastric cancer: A retrospective cohort study.Chinese journal of cancer research = Chung-kuo yen cheng yen chiu · 2025
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Review
  17. Long-Term Outcomes of Venous Resections in Pancreatic Ductal Adenocarcinoma Patients: A Nationwide Cohort Study.Annals of surgery open : perspectives of surgical history, education, and clinical approaches · 2022
    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

8 authors.

Carl Stephan LeonhardtDepartment of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany.
Willem NiesenDepartment of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany.
Eva KalkumStudy Center of the German Society of Surgery, University of Heidelberg, Heidelberg, Germany.
Rosa KlotzDepartment of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany.ORCID 0000-0003-4123-261X
Thomas HankDepartment of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany.
Markus Wolfgang BüchlerDepartment of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany.ORCID 0000-0002-3666-5675
Oliver StrobelDepartment of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany.
Pascal ProbstDepartment of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany.ORCID 0000-0002-0895-4015

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe prognostic impact of margin status is reported with conflicting results after pancreatic cancer resection. While some studies validated an uninvolved resection margin (R0) 1 mm or more of tumour clearance, others have failed to show benefit. This systematic review and meta-analysis aimed to investigate the effects of margin definitions on median overall survival (OS).

methodsMEDLINE, Web of Science, and the Cochrane Central Register of Controlled Trials were searched for studies reporting associations between resection margins and OS between 2010 and 2021. Data regarding margin status (R0 circumferential resection margin (CRM) negative (CRM-), R0 CRM positive (CRM+), R0 direct, and R1 and OS were extracted. Hazard ratios (HRs) were pooled with a random-effects model. The risk of bias was evaluated with the Quality in Prognosis Studies (QUIPS) tool.

resultsThe full texts of 774 studies were screened. In total, 21 studies compromising 6056 patients were included in the final synthesis. In total, 188 (24 per cent) studies were excluded due to missing margin definitions. The R0 (CRM+) rate was 50 per cent (95 per cent confidence interval (c.i.) 0.40 to 0.61) and the R0 (CRM-) rate was 38 per cent (95 per cent c.i. 0.29 to 0.47). R0 (CRM-) resection was independently associated with improved OS compared to combined R1 and R0 (CRM+; HR 1.36, 95 per cent c.i. 1.23 to 1.56).

conclusionThe revised R status was confirmed as an independent prognosticator compared to combined R0 (CRM+) and R1. The limited number of studies, non-standardized pathology protocols, and the varying number of margins assessed hamper comparability.

Indexed as

Margins of ExcisionPancreatic NeoplasmsHumansPancreasPrognosis

Identifiers

PMID35301513
PMCPMC8931487

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Registered trials

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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.