Evidence map›Paper›PMID 27428784›Full record

ArticleNeurosurgery2017

Indications and Efficacy of Gamma Knife Stereotactic Radiosurgery for Recurrent Glioblastoma: 2 Decades of Institutional Experience.

Brandon S Imber, Ishan Kanungo, Steve Braunstein, Igor J Barani, Shannon E Fogh, Jean L Nakamura, Mitchel S Berger, Edward F Chang, Annette M Molinaro, Juan R Cabrera and 3 more

Registry-linked trialOpen access · greenAbstract read
In one paragraph

Article in Neurosurgery, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07668869 (Tumor Treating Fields), which is not on this map. Cited by 31 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 3 pooled it
2.2field-weighted citation impact, top 12% 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.

NCT07668869 narecruitingnot on this mapstarted 2025, after this paper: background citation

Tumor Treating Fields (TTFields) Concomitant With Stereotactic Radiosurgery Based on FET-PET vs TTFields Alone for the Treatment of Recurrent, Glioblastoma (Tarrget 2.0)

TypeinterventionalSponsorProf. Franciszek Lukaszczyk Memorial Oncology CenterRan2025 to 2032Enrolled92ConditionsGlioblastoma, Glioblastoma IDH (Isocitrate Dehydrogenase) Wildtype, Glioblastoma Multiforme, AdultArmsTumor Treating Fields (TTFields), FET-PET-Guided Stereotactic Radiosurgery
3 · Its place in the literature

Who cites it

31 citing papers in PubMed, 3 syntheses or guidelines pooled it, 56 citations in OpenAlex.

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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

13 authors at 2 institutions in 1 country.

Brandon S ImberUniversity of California, San Francisco School of Medicine, San Francisco, California.
Ishan KanungoDepartment of Neurological Surgery and.
Steve BraunsteinDepartment of Radiation Oncology, University of California, San Francisco, San Francisco, California.
Igor J BaraniDepartment of Radiation Oncology, University of California, San Francisco, San Francisco, California.
Shannon E FoghDepartment of Radiation Oncology, University of California, San Francisco, San Francisco, California.
Jean L NakamuraDepartment of Radiation Oncology, University of California, San Francisco, San Francisco, California.
Mitchel S BergerDepartment of Neurological Surgery and.
Edward F ChangDepartment of Neurological Surgery and.
Annette M MolinaroDepartment of Neurological Surgery and.
Juan R CabreraDepartment of Neurological Surgery and.
Michael W McDermottDepartment of Neurological Surgery and.
Penny K SneedDepartment of Radiation Oncology, University of California, San Francisco, San Francisco, California.
Manish K AghiDepartment of Neurological Surgery and.
American Association of Neurological Surgeons · USUniversity of California, San Francisco · US

Funding

Novel Tree-based Statistical Methods for Cancer Risk PredictionR01CA163687 · NCI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI MOLINARO, ANNETTE M · 2012 to 2015
$1.3M
Clinical and Transtional Science InstituteTL1TR000144 · NCATS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI GRANDIS, JENNIFER RUBIN · 2012 to 2015
$643k
NCATS NIH HHS TL1 TR000144NCI NIH HHS R01 CA163687
6 · The paper itself

Abstract

backgroundThe role of stereotactic radiosurgery (SRS) for recurrent glioblastoma and the radionecrosis risk in this setting remain unclear.

objectiveTo perform a large retrospective study to help inform proper indications, efficacy, and anticipated complications of SRS for recurrent glioblastoma.

methodsWe retrospectively analyzed patients who underwent Gamma Knife SRS between 1991 and 2013. We used the partitioning deletion/substitution/addition algorithm to identify potential predictor covariate cut points and Kaplan-Meier and proportional hazards modeling to identify factors associated with post-SRS and postdiagnosis survival.

resultsOne hundred seventy-four glioblastoma patients (median age, 54.1 years) underwent SRS a median of 8.7 months after initial diagnosis. Seventy-five percent had 1 treatment target (range, 1-6), and median target volume and prescriptions were 7.0 cm 3 (range, 0.3-39.0 cm 3 ) and 16.0 Gy (range, 10-22 Gy), respectively. Median overall survival was 10.6 months after SRS and 19.1 months after diagnosis. Kaplan-Meier and multivariable modeling revealed that younger age at SRS, higher prescription dose, and longer interval between original surgery and SRS are significantly associated with improved post-SRS survival. Forty-six patients (26%) underwent salvage craniotomy after SRS, with 63% showing radionecrosis or mixed tumor/necrosis vs 35% showing purely recurrent tumor. The necrosis/mixed group had lower mean isodose prescription compared with the tumor group (16.2 vs 17.8 Gy; P = .003) and larger mean treatment volume (10.0 vs 5.4 cm 3 ; P = .009).

conclusionGamma Knife may benefit a subset of focally recurrent patients, particularly those who are younger with smaller recurrences. Higher prescriptions are associated with improved post-SRS survival and do not seem to have greater risk of symptomatic treatment effect.

Indexed as

RadiosurgeryAdultAgedAged, 80 and overBrain NeoplasmsCraniotomyFemaleGlioblastomaHumansMaleMiddle AgedNeoplasm Recurrence, LocalRetrospective StudiesSalvage TherapyTreatment OutcomeYoung AdultGamma knifeGlioblastomaRadionecrosisRecurrentSRSStereotactic radiosurgery

Identifiers

PMID27428784
PMCPMC5235998
OpenAlexW2471475994

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

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.