Prognostic value of the extent of resection in supratentorial WHO grade II astrocytomas stratified for IDH1 mutation status: a single-center volumetric analysis
Current evidence supports a maximized extent of resection (EOR) in low-grade gliomas (LGG), regardless of different histological subtypes and molecular markers. We therefore evaluated the prognostic impact of extensive, mainly intraoperative (i)MRI-guided surgery in low-grade astrocytomas stratified...
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| Hauptverfasser: | , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
25 June 2016
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| In: |
Journal of neuro-oncology
Year: 2016, Jahrgang: 129, Heft: 2, Pages: 319-328 |
| ISSN: | 1573-7373 |
| DOI: | 10.1007/s11060-016-2177-y |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1007/s11060-016-2177-y Verlag, Volltext: https://link.springer.com/article/10.1007/s11060-016-2177-y 
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| Verfasserangaben: | Christine Jungk, Moritz Scherer, Andreas Mock, David Capper, Alexander Radbruch, Andreas von Deimling, Martin Bendszus, Christel Herold-Mende, Andreas Unterberg |
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| 245 | 1 | 0 | |a Prognostic value of the extent of resection in supratentorial WHO grade II astrocytomas stratified for IDH1 mutation status |b a single-center volumetric analysis |c Christine Jungk, Moritz Scherer, Andreas Mock, David Capper, Alexander Radbruch, Andreas von Deimling, Martin Bendszus, Christel Herold-Mende, Andreas Unterberg |
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| 520 | |a Current evidence supports a maximized extent of resection (EOR) in low-grade gliomas (LGG), regardless of different histological subtypes and molecular markers. We therefore evaluated the prognostic impact of extensive, mainly intraoperative (i)MRI-guided surgery in low-grade astrocytomas stratified for IDH1 mutation status. Retrospective assessment of 46 consecutive cases of newly diagnosed supratentorial WHO grade II astrocytomas treated during the last decade was performed. IDH1 mutation status was obtained for all patients. Volumetric analysis of tumor volumes was performed pre-, intra-, early postoperatively and at first follow-up. Survival analysis was conducted with uni-and multivariate regression models implementing clinical parameters and continuous volumetric variables. Median EOR was 90.4 % (range 17.5-100 %) and was increased to 94.9 % (range 34.8-100 %) in iMRI-guided resections (n = 33). A greater EOR was prognostic for increased progression-free survival (HR 0.23, p = 0.031) and time to re-intervention (TTR) (HR 0.23, p = 0.03). In IDH1 mutant patients, smaller residual tumor volumes were associated with increased TTR (HR 1.01, p = 0.03). IDH1 mutation (38/46 cases) was an independent positive prognosticator for overall survival (OS) in multivariate analysis (HR 0.09, p = 0.002), while extensive surgery had limited impact upon OS. In a subgroup of patients with ≥40 % EOR (n = 39), however, initial and residual tumor volumes were prognostic for OS (HR 1.03, p = 0.005 and HR 1.08, p = 0.007, respectively), persistent to adjustment for IDH1. No association between EOR and neurologic morbidity was found. In this analysis of low-grade astrocytomas stratified for IDH1, extensive tumor resections were prognostic for progression and TTR and, in patients with ≥40 % EOR, for OS. | ||
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