Evidence map›Paper›PMID 24158110›Full record

ArticleNeuro-oncology2013

Primary glioblastoma with oligodendroglial differentiation has better clinical outcome but no difference in common biological markers compared with other types of glioblastoma.

Ross C Laxton, Sergey Popov, Lawrence Doey, Alexa Jury, Ranj Bhangoo, Richard Gullan, Chris Chandler, Lucy Brazil, Gill Sadler, Ron Beaney and 6 more

Abstract readComparative Study
In one paragraph

Article in Neuro-oncology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing 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

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

  1. Pooled it
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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

16 authors.

Ross C LaxtonCorresponding Author: Ross Laxton, PhD, Department of Clinical Neuropathology, King's College Hospital, Denmark Hill, London SE5 9RS, UK. ross.laxton@nhs.net.
Sergey Popov
Lawrence Doey
Alexa Jury
Ranj Bhangoo
Richard Gullan
Chris Chandler
Lucy Brazil
Gill Sadler
Ron Beaney
Naomi Sibtain
Andrew King
Istvan Bodi
Chris Jones
Keyoumars Ashkan
Safa Al-Sarraj

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGlioblastoma multiforme with an oligodendroglial component (GBMO) has been recognized in the World Health Organization classification-however, the diagnostic criteria, molecular biology, and clinical outcome of primary GBMO remain unclear. Our aim was to investigate whether primary GBMO is a distinct clinicopathological subgroup of GBM and to determine the relative frequency of prognostic markers such as loss of heterozygosity (LOH) on 1p and/or 19q, O(6)-methylguanine-DNA methyltransferase (MGMT) promoter methylation, and isocitrate dehydrogenase 1 (IDH1) mutation.

methodsWe examined 288 cases of primary GBM and assessed the molecular markers in 57 GBMO and 50 cases of other primary GBM, correlating the data with clinical parameters and outcome.

resultsGBMO comprised 21.5% of our GBM specimens and showed significantly longer survival compared with our other GBM (12 mo vs 5.8 mo, P = .006); there was also a strong correlation with younger age at diagnosis (56.4 y vs 60.6 y, P = .005). Singular LOH of 19q (P = .04) conferred a 1.9-fold increased hazard of shorter survival. There was no difference in the frequencies of 1p or 19q deletion, MGMT promoter methylation, or IDH1 mutation (P = .8, P = 1.0, P = 1.0, respectively).

conclusionsPrimary GBMO is a subgroup of GBM associated with longer survival and a younger age group but shows no difference in the frequency of LOH of 1p/19q, MGMT, and IDH1 mutation compared with other primary GBM.

Indexed as

DNA MethylationLoss of HeterozygosityAdultAgedAged, 80 and overBrain NeoplasmsChromosomes, Human, Pair 1Chromosomes, Human, Pair 19DNA Modification MethylasesDNA Repair EnzymesFemaleFollow-Up StudiesGlioblastomaHumansIsocitrate DehydrogenaseMaleDNA Modification MethylasesDNA Repair EnzymesIDH1 protein, humanIsocitrate DehydrogenaseMGMT protein, humanTumor Suppressor Proteins1p/19qglioblastoma with an oligodendroglial componenthistopathologyIDH1MGMT

Identifiers

PMID24158110
PMCPMC3829593

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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.