Evidence map›Paper›PMID 30203209›Full record

ArticleSurgical endoscopy2019

Polyp size of 1 cm is insufficient to discriminate neoplastic and non-neoplastic gallbladder polyps.

Sarah Z Wennmacker, Aafke H van Dijk, Joris H J Raessens, Cornelis J H M van Laarhoven, Joost P H Drenth, Philip R de Reuver, Iris D Nagtegaal

Open access · hybridAbstract read
In one paragraph

Article in Surgical endoscopy, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 2 pooled it
7.8field-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

40 citing papers in PubMed, 2 syntheses or guidelines pooled it, 90 citations in OpenAlex.

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  16. Predicting Neoplastic Gallbladder Polyps: The Role of Current Surgical Indications and Preoperative Images.The Korean journal of gastroenterology = Taehan Sohwagi Hakhoe chi · 2025
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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

7 authors at 3 institutions in 1 country.

Sarah Z WennmackerDepartment of Surgery, Radboud University Medical Centre, r 618, PO Box 9101, 6500 HB, Nijmegen, The Netherlands. sarah.wennmacker@radboudumc.nl.
Aafke H van DijkDepartment of Surgery, Academic Medical Centre, Amsterdam, The Netherlands.
Joris H J RaessensDepartment of Surgery, Radboud University Medical Centre, r 618, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.
Cornelis J H M van LaarhovenDepartment of Surgery, Radboud University Medical Centre, r 618, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.
Joost P H DrenthDepartment of Gastroenterology and Hepatology, Radboud University Medical Centre, Nijmegen, The Netherlands.
Philip R de ReuverDepartment of Surgery, Radboud University Medical Centre, r 618, PO Box 9101, 6500 HB, Nijmegen, The Netherlands.
Iris D NagtegaalDepartment of Pathology, Radboud University Medical Centre, Nijmegen, The Netherlands.
Radboud University Medical Center · NLRadboud University Nijmegen · NLAcademic Medical Center · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA significant proportion of gallbladder polyps are non-neoplastic, for which resection is not necessary. However, international guidelines advocate cholecystectomy for all polyps ≥ 1 cm. This study assessed a national cohort of histopathologically proven gallbladder polyps to distinguish neoplastic from non-neoplastic polyps.

methodsPALGA, the nationwide network and registry of histo- and cytopathology, was searched to identify all histopathologically proven gallbladder polyps between 2003 and 2013. All polyps and (focal) wall thickenings > 5 mm were included, and classified as neoplastic or non-neoplastic. Polyp subtype, size, distribution, presentation as wall thickening or protruding polyp, and presence of gallstones were assessed for neoplastic and non-neoplastic polyps. A decision tree to distinguish neoplastic and non-neoplastic polyps was made and diagnostic accuracy of 1 cm surgical threshold was calculated.

resultsA total of 2085 out of 220,612 cholecystectomies contained a polyp (0.9%). Of these polyps, 56.4% were neoplastic (40.1% premalignant, 59.9% malignant) and 43.6% non-neoplastic (41.5% cholesterol polyp, 37.0% adenomyomatosis, 21.5% other). Polyp size, distribution, and presence of gallstones were reported in 1059, 1739 and 1143 pathology reports, respectively. Neoplastic polyps differed from non-neoplastic polyps in size (18.1 mm vs 7.5 mm, p < 0.001), singularity (88.2% vs 68.2%, p < 0.001), wall thickening (29.1% vs 15.6%, p < 0.001), and presence of gallstones (50.1% vs 40.4%, p = 0.001). However, adenomyomatosis presented with similar characteristics as neoplastic polyps. Fifty percent of polyps were ≥ 1 cm surgical threshold (optimal surgical threshold based on ROC-curve); sensitivity for indicating neoplastic polyps was 68.1%, specificity was 70.2%, and positive and negative predictive values were 72.9% and 65.1%.

conclusionsThe prevalence of gallbladder polyps on cholecystectomy is low and many of the polyps are non-neoplastic. Clinicopathological characteristics differ between neoplastic and non-neoplastic polyps in general, but these cannot properly indicate neoplasia. The 1 cm surgical threshold has moderate diagnostic accuracy and is insufficient to indicate surgery for neoplastic gallbladder polyps.

Indexed as

Clinical Decision RulesAdenocarcinomaAdenomaAdolescentAdultAgedAged, 80 and overCholecystectomyClinical Decision-MakingDecision TreesDiagnosis, DifferentialFemaleGallbladderGallbladder NeoplasmsHumansMaleCholecystectomyGallbladder polypNeoplasiaSurgical threshold

Identifiers

PMID30203209
PMCPMC6484812
OpenAlexW2890665624

What OpenQuestion holds

Textmetadata
LicenceCC BY
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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.