Evidence map›Paper›PMID 34424585›Full record

SynthesisEuropean journal of neurology2021

Intracranial aneurysm wall enhancement as an indicator of instability: a systematic review and meta-analysis.

Rob Molenberg, Marlien W Aalbers, Auke P A Appelman, Maarten Uyttenboogaart, J Marc C van Dijk

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in European journal of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed, 4 pooled it
–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

41 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Pooled it
  2. Single-stage endovascular treatment in aneurysmal subarachnoid haemorrhage with multiple intracranial aneurysms: Systematic review of the literature and multicentric retrospective experience.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2026
    Pooled it
  3. Pooled it
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  10. Observational
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  14. Intracranial vessel wall lesions on MRI: anatomical and pathological issues.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
    Review
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  16. Article
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  20. The effect of aspirin on aneurysm wall enhancement: A study in rabbits and humans.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Rob MolenbergDepartment of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.ORCID 0000-0002-6621-2028
Marlien W AalbersDepartment of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Auke P A AppelmanMedical Imaging Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
Maarten UyttenboogaartMedical Imaging Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
J Marc C van DijkDepartment of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.ORCID 0000-0002-0814-5680

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeAneurysm wall enhancement (AWE) of intracranial aneurysms on magnetic resonance imaging has been described in previous studies as a surrogate marker of instability. With this study, an updated literature overview and summary risk estimates of the association between AWE and different specific outcomes (i.e., rupture, growth or symptomatic presentation) for both cross-sectional and longitudinal studies are provided.

methodsThe PRISMA guideline was followed and a search was performed of PubMed and Embase to 1 January 2021 for studies that reported on AWE and aneurysm instability. In cross-sectional studies, AWE was compared between patients with stable and unstable aneurysms. In longitudinal studies, AWE of stable aneurysms was assessed at baseline after which patients were followed longitudinally. Risk ratios were calculated for longitudinal studies, prevalence ratios for cross-sectional studies and then the ratios were pooled in a random-effects meta-analysis. Also, the performance of AWE to differentiate between stable and unstable aneurysms was evaluated.

resultsTwelve studies were included with a total of 1761 aneurysms. In cross-sectional studies, AWE was positively associated with rupture (prevalence ratio 11.47, 95% confidence interval [CI] 4.05-32.46) and growth or symptomatic presentation (prevalence ratio 4.62, 95% CI 2.85-7.49). Longitudinal studies demonstrated a positive association between AWE and growth or rupture (risk ratio 8.00, 95% CI 2.14-29.88). Assessment of the performance of AWE showed high sensitivities, mixed specificities, low positive predictive values and high negative predictive values.

conclusionsAlthough AWE is positively associated with aneurysm instability, current evidence mostly supports the use of its absence as a surrogate marker of aneurysm stability.

Indexed as

Aneurysm, RupturedIntracranial AneurysmCross-Sectional StudiesHumansMagnetic Resonance ImagingOdds RatioRisk Factorsaneurysmgadoliniuminflammationmagnetic resonance angiographyrisk assessment

Identifiers

PMID34424585
PMCPMC9292155

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.