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Erschienen in: European Radiology 9/2017

06.02.2017 | Magnetic Resonance

Volume of high-risk intratumoral subregions at multi-parametric MR imaging predicts overall survival and complements molecular analysis of glioblastoma

verfasst von: Yi Cui, Shangjie Ren, Khin Khin Tha, Jia Wu, Hiroki Shirato, Ruijiang Li

Erschienen in: European Radiology | Ausgabe 9/2017

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Abstract

Objective

To develop and validate a volume-based, quantitative imaging marker by integrating multi-parametric MR images for predicting glioblastoma survival, and to investigate its relationship and synergy with molecular characteristics.

Methods

We retrospectively analysed 108 patients with primary glioblastoma. The discovery cohort consisted of 62 patients from the cancer genome atlas (TCGA). Another 46 patients comprising 30 from TCGA and 16 internally were used for independent validation. Based on integrated analyses of T1-weighted contrast-enhanced (T1-c) and diffusion-weighted MR images, we identified an intratumoral subregion with both high T1-c and low ADC, and accordingly defined a high-risk volume (HRV). We evaluated its prognostic value and biological significance with genomic data.

Results

On both discovery and validation cohorts, HRV predicted overall survival (OS) (concordance index: 0.642 and 0.653, P < 0.001 and P = 0.038, respectively). HRV stratified patients within the proneural molecular subtype (log-rank P = 0.040, hazard ratio = 2.787). We observed different OS among patients depending on their MGMT methylation status and HRV (log-rank P = 0.011). Patients with unmethylated MGMT and high HRV had significantly shorter survival (median survival: 9.3 vs. 18.4 months, log-rank P = 0.002).

Conclusion

Volume of the high-risk intratumoral subregion identified on multi-parametric MRI predicts glioblastoma survival, and may provide complementary value to genomic information.

Key points

High-risk volume (HRV) defined on multi-parametric MRI predicted GBM survival.
The proneural molecular subtype tended to harbour smaller HRV than other subtypes.
Patients with unmethylated MGMT and high HRV had significantly shorter survival.
HRV complements genomic information in predicting GBM survival
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Metadaten
Titel
Volume of high-risk intratumoral subregions at multi-parametric MR imaging predicts overall survival and complements molecular analysis of glioblastoma
verfasst von
Yi Cui
Shangjie Ren
Khin Khin Tha
Jia Wu
Hiroki Shirato
Ruijiang Li
Publikationsdatum
06.02.2017
Verlag
Springer Berlin Heidelberg
Erschienen in
European Radiology / Ausgabe 9/2017
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-017-4751-x

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