Evidence map›Paper›PMID 33664967›Full record

ReviewNeuro-oncology practice2021

Systematic review of the incidence and risk factors for cerebral vasculopathy and stroke after cranial proton and photon radiation for childhood brain tumors.

Abhishek Bavle, Anand Srinivasan, Farooq Choudhry, Michael Anderson, Michael Confer, Hilarie Simpson, Theresa Gavula, J Spencer Thompson, Shari Clifton, Naina L Gross and 1 more

Open access · greenAbstract readReview
In one paragraph

Review in Neuro-oncology practice, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 3 pooled it
3.5field-weighted citation impact, top 6% 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

24 citing papers in PubMed, 3 syntheses or guidelines pooled it, 33 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
  5. Article
  6. Obstacles and Trials in Treating Primary Brain Tumors.International journal of molecular sciences · 2026
    Review
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Moyamoya syndrome after proton beam therapy in a pediatric patient with a pineal germ cell tumor and a germline polymorphism in RNF213.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2024
    Article
  13. Article
  14. Article
  15. Stroke in Asia.Cerebrovascular diseases extra · 2024
    Review
  16. Review
  17. Article
  18. Article
  19. Review
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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

11 authors at 5 institutions in 2 countries.

Abhishek BavleChildren's Blood and Cancer Center, Dell Children's Medical Center of Central Texas, Toronto, Canada.ORCID https://orcid.org/0000-0001-9927-8106
Anand SrinivasanBlood and Marrow Transplant Program, Hospital for Sick Children, Toronto, Canada.
Farooq ChoudhryDepartment of Radiology, University of Oklahoma Health Sciences Center (OUHSC) Oklahoma City, OK, US.
Michael AndersonDepartment of Pediatrics, OUHSC, Oklahoma City, OK, US.
Michael ConferRadiation Medicine Associates, Oklahoma City, OK, US.
Hilarie SimpsonDepartment of Radiation Oncology, University of Kansas School of Medicine, Oklahoma City, OK, US.
Theresa GavulaDepartment of Pediatrics, OUHSC, Oklahoma City, OK, US.
J Spencer ThompsonDepartment of Radiation Oncology, OUHSC, Oklahoma City, OK, US.
Shari CliftonReference Section, OUHSC, Oklahoma City, OK, US.
Naina L GrossDepartment of Neurosurgery, OUHSC, Oklahoma City, OK, US.
Rene McNall-KnappDepartment of Pediatrics, OUHSC, Oklahoma City, OK, US.
University of Oklahoma Health Sciences Center · USDell Children's Medical Center of Central Texas · USHospital for Sick Children · CARadiation Oncology Associates · USUniversity of Kansas · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe aim of our study is to determine the incidence, timing, and risk factors for cerebral vasculopathy after cranial proton and photon radiation for pediatric brain tumors.

methodsWe performed a single-institution retrospective review of a cohort of children treated with proton radiation for brain tumors. MRA and/or MRI were reviewed for evidence of cerebral vascular stenosis and infarcts. Twenty-one similar studies (17 photon, 4 proton) were identified by systematic literature review.

resultsFor 81 patients with median follow-up of 3 years, the rates of overall and severe vasculopathy were 9.9% and 6.2% respectively, occurring a median of 2 years post radiation. Dose to optic chiasm greater than 45 Gy and suprasellar location were significant risk factors. Results were consistent with 4 prior proton studies (752 patients) that reported incidence of 5% to 6.7%, 1.5 to 3 years post radiation. With significantly longer follow-up (3.7-19 years), 9 studies (1108 patients) with traditional photon radiation reported a higher rate (6.3%-20%) and longer time to vasculopathy (2-28 years). Significant risk factors were neurofibromatosis type 1 (NF-1; rate 7.6%-60%) and suprasellar tumors (9%-20%). In 10 studies with photon radiation (1708 patients), the stroke rate was 2% to 18.8% (2.3-24 years post radiation).

conclusionsChildhood brain tumor survivors need screening for vasculopathy after cranial radiation, especially with higher dose to optic chiasm, NF-1, and suprasellar tumors. Prospective studies are needed to identify risk groups, and ideal modality and timing, for screening of this toxicity.

Indexed as

cerebral vasculopathychildhood brain tumorsphoton radiationproton radiationstroke

Identifiers

PMID33664967
PMCPMC7906269
OpenAlexW3089972637

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.