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29.11.2018 | Clinical Study

Molecular features and clinical outcomes in surgically treated low-grade diffuse gliomas in patients over the age of 60

Zeitschrift:
Journal of Neuro-Oncology
Autoren:
Ramin A. Morshed, Seunggu J. Han, Shawn L. Hervey-Jumper, Melike Pekmezci, Irene Troncon, Susan M. Chang, Nicholas A. Butowski, Mitchel S. Berger
Wichtige Hinweise

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s11060-018-03044-4) contains supplementary material, which is available to authorized users.
Ramin A. Morshed and Seunggu J. Han contributed equally to this work.

Abstract

Purpose

WHO grade II gliomas are uncommon in patients over the age of 60, and there is a lack in consensus regarding their management. We present molecular tumor characteristics as well as clinical outcomes in patients over the age of 60 undergoing surgical resection of a WHO grade II glioma.

Methods

After receiving IRB approval, patients were identified through the UCSF Brain Tumor Center. Pathologic diagnosis was completed using WHO 2016 grading criteria.

Results

Twenty-six patients with a mean age of 66 years met inclusion criteria with a median follow-up of 5.2 years. Diagnoses included diffuse astrocytoma IDH-mutant (19.2%), diffuse astrocytoma IDH-wildtype (26.9%), Oligodendroglioma IDH-mutant and 1p/19q-codeleted (50%), and a rare case of mixed oligoastrocytoma (3.9%). 66% of astrocytoma IDH-wildtype tumors possessed TERT mutation. Median extent of resection was 75.4%. Progression-free (PFS) and overall survival (OS) were 23.5 and 62.6 months, respectively. Shorter PFS was associated with the astrocytoma IDH-wildtype subtype despite similar extent of resection and adjuvant treatment rates compared to the other subtypes. OS did not differ between subtypes. Malignant transformation and death were associated with larger preoperative and residual tumor volume.

Conclusions

Older patients with diffuse gliomas may safely undergo aggressive treatment with surgical resection and adjuvant therapy. Elderly patients with low grade gliomas have worse clinical outcomes compared to their younger counterparts. This may be due to an increased frequency of diffuse astrocytoma IDH-wildtype tumors in this age group.

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Zusatzmaterial
Supplementary Table 1 (XLSX 13 KB)
11060_2018_3044_MOESM1_ESM.xlsx
Literatur
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