Evidence map›Paper›PMID 40814429›Full record

ArticleNeuro-oncology practice2025

Cannabis use among Dutch patients with a primary brain tumor.

Vera Belgers, Niek A Rietveld, Philip C de Witt Hamer, Johanna M Niers

Abstract read
In one paragraph

Article in Neuro-oncology practice, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. 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

4 authors.

Vera BelgersDepartment of Neurology, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.ORCID https://orcid.org/0000-0002-5980-8202
Niek A RietveldDepartment of Neurosurgery, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
Philip C de Witt HamerDepartment of Neurosurgery, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.ORCID https://orcid.org/0000-0003-2988-8544
Johanna M NiersDepartment of Neurology, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Cancer patients commonly use cannabis to improve symptoms or for presumed anticancer effects. However, the extent and type of cannabis use among Dutch primary brain tumor patients, along with their motivations, remains unclear. This study aims to determine the prevalence of prior or current cannabis use in patients with a primary brain tumor, the type of cannabis used, their motivation, how they perceived the effects of the cannabis, and what adverse effects they noticed. Methods: We conducted a cross-sectional survey of adult primary brain tumor patients who visited the neuro-oncology outpatient clinic at Amsterdam UMC between August and October 2023. Results: Of 100 responding patients, 51% had ever used cannabis and 14% currently used cannabis. Of the total group, 19% currently or previously used cannabis for tumor-related reasons, including symptom relief ( Conclusions: A considerable amount of primary brain tumor patients use cannabis, often for symptom relief or presumed antitumor effects. The user rate underscores a demand for clinical research into the therapeutic efficacy of cannabis, particularly concerning its impact on symptoms like sleep disturbances, depressive symptoms, and anxiety/worrying, as well as its tumor-inhibiting capabilities.

Indexed as

cannabidiolgliomamarijuanameningiomaΔ9-tetrahydrocannabinol

Identifiers

PMID40814429
PMCPMC12349755

What OpenQuestion holds

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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.