Evidence map›Paper›PMID 33151327›Full record

ArticleNeuro-oncology2021

Intellectual changes after radiation for children with brain tumors: which brain structures are most important?

Derek S Tsang, Laurence Kim, Zhihui Amy Liu, Laura Janzen, Mohammad Khandwala, Eric Bouffet, Normand Laperriere, Hitesh Dama, Dana Keilty, Tim Craig and 3 more

Open access · bronzeAbstract read
In one paragraph

Article in Neuro-oncology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
1.9field-weighted citation impact, top 13% 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

23 citing papers in PubMed, 1 synthesis or guideline pooled it, 33 citations in OpenAlex.

  1. Pooled it
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  6. Review
  7. Approaches to Reduce Toxicity in Pediatric Brain Tumors.Current oncology (Toronto, Ont.) · 2025
    Review
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  19. Cognitive Risk in Survivors of Pediatric Brain Tumors.Journal of clinical oncology : official journal of the American Society of Clinical Oncology · 2021
    Review
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

13 authors at 3 institutions in 1 country.

Derek S TsangRadiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
Laurence KimRadiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
Zhihui Amy LiuDepartment of Biostatistics, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
Laura JanzenNeurosciences and Mental Health Program, Research Institute, Hospital for Sick Children; Department of Psychology, University of Toronto, Toronto, Ontario, Canada.
Mohammad KhandwalaRadiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
Eric BouffetDivision of Haematology/Oncology, Hospital for Sick Children, Toronto, Ontario, Canada.
Normand LaperriereRadiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
Hitesh DamaRadiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
Dana KeiltyRadiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
Tim CraigRadiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
Vijay RamaswamyDivision of Haematology/Oncology, Hospital for Sick Children, Toronto, Ontario, Canada.
David C HodgsonRadiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.
Donald MabbottNeurosciences and Mental Health Program, Research Institute, Hospital for Sick Children; Department of Psychology, University of Toronto, Toronto, Ontario, Canada.
University Health Network · CAHospital for Sick Children · CAUniversity of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe objective of this study was to evaluate the contribution of radiation dose to different intracranial structures on changes in intellectual function for children with brain tumors.

methodsWe evaluated children with brain tumors treated in 2005-2017 who had longitudinal neuropsychological assessments and available photon dosimetric data (if radiation therapy [RT] given). Full Scale Intelligence Quotient (FSIQ) and index scores were evaluated (perceptual reasoning index [PRI], processing speed index [PSI], verbal comprehension index [VCI], and working memory index [WMI]). Multivariable linear mixed effects models were used to model endpoints, with age at RT and dose to different brain regions as fixed effects and patient-specific random intercepts. P-values (P*) were adjusted for multiple comparisons.

resultsSixty-nine patients were included, 56 of whom received RT. Median neuropsychological follow-up was 3.2 years. Right temporal lobe mean dose was strongly associated with decline in FSIQ (P* = 0.005); with each gray increase in mean dose, there was a decrease of 0.052 FSIQ points per year. Dose to 50% (D50) of the supratentorial brain was associated with decline in PSI (P* = 0.006) and WMI (P* = 0.001). Right and left hippocampus D50 were individually strongly associated with declines in VCI (P* = 0.009 for each). Presence of a ventriculoperitoneal shunt decreased FSIQ by 10 points.

conclusionsWe reported associations between dosimetry to specific brain regions and intellectual outcomes, with suggested avoidance structures during RT planning. These models can help clinicians anticipate changes in neurocognition post-RT and guide selection of an optimal RT plan.

Indexed as

Brain NeoplasmsIntelligenceChildHumansIntelligence TestsMemory, Short-TermNeuropsychological Testsbrain neoplasmscognitive dysfunctionintelligence testspediatricsradiation

Identifiers

PMID33151327
PMCPMC7992884
OpenAlexW3096194200

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.