Evidence map›Paper›PMID 29064038›Full record

ArticleActa neurochirurgica2017

Hypofractionated high-energy proton-beam irradiation is an alternative treatment for WHO grade I meningiomas.

Pavlos Vlachogiannis, Olafur Gudjonsson, Anders Montelius, Erik Grusell, Ulf Isacsson, Kristina Nilsson, Erik Blomquist

Abstract readEvaluation Study
In one paragraph

Article in Acta neurochirurgica, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 2 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

17 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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  13. Particle therapy in the future of precision therapy.The British journal of radiology · 2020
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  16. The evolution of practical radiobiological modelling.The British journal of radiology · 2019
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors.

Pavlos VlachogiannisDepartment of Neuroscience, Neurosurgery, Uppsala University, Uppsala University Hospital, 751 85, Uppsala, Sweden. Pavlos.vlachogiannis@neuro.uu.se.ORCID 0000-0002-8597-8862
Olafur GudjonssonDepartment of Neuroscience, Neurosurgery, Uppsala University, Uppsala University Hospital, 751 85, Uppsala, Sweden.
Anders MonteliusDepartment of Immunology, Genetics and Pathology, Medical Radiation Science, Uppsala University Hospital, 751 85, Uppsala, Sweden.
Erik GrusellDepartment of Immunology, Genetics and Pathology, Medical Radiation Science, Uppsala University Hospital, 751 85, Uppsala, Sweden.
Ulf IsacssonDepartment of Immunology, Genetics and Pathology, Medical Radiation Science, Uppsala University Hospital, 751 85, Uppsala, Sweden.
Kristina NilssonDepartment of Immunology, Genetics and Pathology, Experimental and Clinical Oncology, Uppsala University, Uppsala University Hospital, 751 85, Uppsala, Sweden.
Erik BlomquistDepartment of Immunology, Genetics and Pathology, Experimental and Clinical Oncology, Uppsala University, Uppsala University Hospital, 751 85, Uppsala, Sweden.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRadiation treatment is commonly employed in the treatment of meningiomas. The aim of this study was to evaluate the effectiveness and safety of hypofractionated high-energy proton therapy as adjuvant or primary treatment for WHO grade I meningiomas.

methodA total of 170 patients who received irradiation with protons for grade I meningiomas between 1994 and 2007 were included in the study. The majority of the tumours were located at the skull base (n = 155). Eighty-four patients were treated post subtotal resection, 42 at tumour relapse and 44 with upfront radiotherapy after diagnosis based on the typical radiological image. Irradiation was given in a hypofractionated fashion (3-8 fractions, usually 5 or 6 Gy) with a mean dose of 21.9 Gy (range, 14-46 Gy). All patients were planned for follow-up with clinical controls and magnetic resonance imaging scans at 6 months and 1, 2, 3, 5, 7 and 10 years after treatment. The median follow-up time was 84 months. Age, gender, tumour location, Simpson resection grade and target volume were assessed as possible prognostic factors for post-irradiation tumour progression and radiation related complications.

resultsThe actuarial 5- and 10-year progression-free survival rates were 93% and 85% respectively. Overall mortality rate was 13.5%, while disease-specific mortality was 1.7% (3/170 patients). Older patients and patients with tumours located in the middle cranial fossa had a lower risk for tumour progression. Radiation-related complications were seen in 16 patients (9.4%), with pituitary insufficiency being the most common. Tumour location in the anterior cranial fossa was the only factor that significantly increased the risk of complications.

conclusionsHypofractionated proton-beam radiation therapy may be used particularly in the treatment of larger World Health Organisation grade I meningiomas not amenable to total surgical resection. Treatment is associated with high rates of long-term tumour growth control and acceptable risk for complications.

Indexed as

AdultAgedFemaleHumansMaleMeningeal NeoplasmsMeningiomaMiddle AgedProton TherapyRadiation Dose HypofractionationBenign meningiomaHypofractionationMeningiomaProton beam irradiation

Identifiers

PMID29064038
PMCPMC5686253

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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.