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Erschienen in: Journal of Neuro-Oncology 2/2019

21.09.2019 | Clinical Study

Negative prognostic impact of epidermal growth factor receptor copy number gain in young adults with isocitrate dehydrogenase wild-type glioblastoma

verfasst von: Daniel I. Hoffman, Kalil G. Abdullah, Makayla McCoskey, Zev A. Binder, Donald M. O’Rourke, Arati S. Desai, MacLean P. Nasrallah, Ashkan Bigdeli, Jennifer J. D. Morrissette, Steven Brem, Stephen J. Bagley

Erschienen in: Journal of Neuro-Oncology | Ausgabe 2/2019

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Abstract

Purpose

Young adults with isocitrate-dehydrogenase wild-type (IDH-WT) glioblastoma (GBM) represent a rare, understudied population compared to pediatric high-grade glioma, IDH-mutant GBM, or IDH-WT GBM in older patients. We aimed to explore the prognostic impact of epidermal growth factor receptor copy number gain (EGFR CN gain), one of the most common genetic alterations in IDH-WT glioma, in young adults with IDH-WT GBM.

Methods

We performed a retrospective cohort study of patients 18–45 years old with newly diagnosed, IDH-WT GBM whose tumors underwent next-generation sequencing at our institution between 2014 and 2018. The impact of EGFR CN gain on time to tumor progression (TTP) and overall survival (OS) was assessed. A validation cohort of patients 18–45 years old with IDH-WT GBM was analyzed from The Cancer Genome Atlas (TCGA).

Results

Ten of 28 patients (36%) from our institution had EGFR CN gain, which was associated with shorter TTP (median 6.5 vs. 11.9 months; p = 0.06) and OS (median 16.3 vs. 23.5 months; p = 0.047). The negative prognostic impact of EGFR CN gain on OS persisted in a multivariate model (HR 6.40, 95% CI 1.3–31.0, p = 0.02). In the TCGA cohort (N = 43), EGFR CN gain was associated with shorter TTP and worse OS, although these did not reach statistical significance (TTP, median 11.5 vs. 14.4 months, p = 0.18; OS, median 23.6 vs. 27.8 months; p = 0.18).

Conclusions

EGFR CN gain may be associated with inferior outcomes in young adults with newly diagnosed, IDH-WT GBM, suggesting a potential role for targeting EGFR in this population.
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Metadaten
Titel
Negative prognostic impact of epidermal growth factor receptor copy number gain in young adults with isocitrate dehydrogenase wild-type glioblastoma
verfasst von
Daniel I. Hoffman
Kalil G. Abdullah
Makayla McCoskey
Zev A. Binder
Donald M. O’Rourke
Arati S. Desai
MacLean P. Nasrallah
Ashkan Bigdeli
Jennifer J. D. Morrissette
Steven Brem
Stephen J. Bagley
Publikationsdatum
21.09.2019
Verlag
Springer US
Erschienen in
Journal of Neuro-Oncology / Ausgabe 2/2019
Print ISSN: 0167-594X
Elektronische ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-019-03298-6

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