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Erschienen in: Journal of Neuro-Oncology 1/2022

17.02.2022 | Clinical Study

The survival outcomes of molecular glioblastoma IDH-wildtype: a multicenter study

verfasst von: Andres Ramos-Fresnedo, Michael W. Pullen, Carlos Perez-Vega, Ricardo A. Domingo, Oluwaseun O. Akinduro, Joao P. Almeida, Paola Suarez-Meade, Lina Marenco-Hillembrand, Mark E. Jentoft, Bernard R. Bendok, Daniel M. Trifiletti, Kaisorn L. Chaichana, Alyx B. Porter, Alfredo Quiñones-Hinojosa, Terence C. Burns, Sani H. Kizilbash, Erik H. Middlebrooks, Wendy J. Sherman

Erschienen in: Journal of Neuro-Oncology | Ausgabe 1/2022

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Abstract

Purpose

Histological diagnosis of glioblastoma (GBM) was determined by the presence of necrosis or microvascular proliferation (histGBM). The 2021 WHO classification now considers IDH-wildtype diffuse astrocytic tumors without the histological features of glioblastoma (that would have otherwise been classified as grade 2 or 3) as molecular GBM (molGBM, WHO grade 4) if they harbor any of the following molecular abnormalities: TERT promoter mutation, EGFR amplification, or chromosomal + 7/− 10 copy changes. The objective of this study was to explore and compare the survival outcomes between histGBM and molGBM.

Methods

Medical records for patients diagnosed with GBM at the three tertiary care academic centers of our institution from November 2017 to October 2021. Only patients who underwent adjuvant chemoradiation were included. Patients without molecular feature testing or with an IDH mutation were excluded. Univariable and multivariable analyses were performed to evaluate progression-free (PFS) and overall- survival (OS).

Results

708 consecutive patients were included; 643 with histGBM and 65 with molGBM. Median PFS was 8 months (histGBM) and 13 months (molGBM) (p = 0.0237) and median OS was 21 months (histGBM) versus 26 months (molGBM) (p = 0.435). Multivariable analysis on the molGBM sub-group showed a worse PFS if there was contrast enhancement on MRI (HR 6.224 [CI 95% 2.187–17.714], p < 0.001) and a superior PFS on patients with MGMT methylation (HR 0.026 [CI 95% 0.065–0.655], p = 0.007).

Conclusions

molGBM has a similar OS but significantly longer PFS when compared to histGBM. The presence of contrast enhancement and MGMT methylation seem to affect the clinical behavior of this subset of tumors.
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Metadaten
Titel
The survival outcomes of molecular glioblastoma IDH-wildtype: a multicenter study
verfasst von
Andres Ramos-Fresnedo
Michael W. Pullen
Carlos Perez-Vega
Ricardo A. Domingo
Oluwaseun O. Akinduro
Joao P. Almeida
Paola Suarez-Meade
Lina Marenco-Hillembrand
Mark E. Jentoft
Bernard R. Bendok
Daniel M. Trifiletti
Kaisorn L. Chaichana
Alyx B. Porter
Alfredo Quiñones-Hinojosa
Terence C. Burns
Sani H. Kizilbash
Erik H. Middlebrooks
Wendy J. Sherman
Publikationsdatum
17.02.2022
Verlag
Springer US
Erschienen in
Journal of Neuro-Oncology / Ausgabe 1/2022
Print ISSN: 0167-594X
Elektronische ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-022-03960-6

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