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Published in: Journal of Neuro-Oncology 3/2019

01-05-2019 | Glioma | Clinical Study

Awake craniotomies for epileptic gliomas: intraoperative and postoperative seizure control and prognostic factors

Authors: Yu-Chi Wang, Cheng-Chi Lee, Hirokazu Takami, Stephanie Shen, Ko-Ting Chen, Kuo-Chen Wei, Min-Hsien Wu, Gregory Worrell, Pin-Yuan Chen

Published in: Journal of Neuro-Oncology | Issue 3/2019

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Abstract

Purpose

Awake craniotomy is well-established for tumors resected in eloquent brain areas. Whether awake craniotomy provides improved seizure control in patients with epileptic gliomas has not been well evaluated. This study analyzed the incidence, risk factors and outcome of seizures during and following awake craniotomies for patients presenting with epilepsy and glioma.

Methods

Forty-one patients undergoing awake craniotomies for epileptic gliomas were retrospectively analyzed. Postoperative seizure was defined as either early (postoperative day 7 + before) or late onset (after postoperative day 7). Neurologic function was assessed with modified Rankin Scales (mRS) and seizure outcome was assessed using International League Against Epilepsy (ILAE) classification. Multivariable logistic regression was used for clinical variables associated with postoperative seizures.

Results

Three patients (7.3%) had intraoperative seizures however did not fail the awake craniotomies. Mean mRS before and after the awake craniotomies were 2.4 and 2.1, respectively (P = 0.032). Fourteen (34.1%) patients had early seizures, which caused longer hospitalization than those without early seizures (P = 0.03). Surgical resection to isocitrate dehydrogenase 1 (IDH1) mutation tumors, comparing to IDH1 wild type tumors, caused better postoperative seizure control. 6-month late seizure freedom was achieved in 33 patients (80.5%). Early seizure recurrence (odds ratio = 30.75; P = 0.039) and postoperative mRS ≥ 3 (odds ratio = 7.00; P = 0.047) were independent risk factors for late seizures.

Conclusions

Intraoperative seizures could be well-controlled during awake craniotomies. Early postoperative seizures extended hospitalization and strongly predicted late seizure recurrence. Awake craniotomies benefited long-term seizure control in patients with epileptic gliomas.
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Metadata
Title
Awake craniotomies for epileptic gliomas: intraoperative and postoperative seizure control and prognostic factors
Authors
Yu-Chi Wang
Cheng-Chi Lee
Hirokazu Takami
Stephanie Shen
Ko-Ting Chen
Kuo-Chen Wei
Min-Hsien Wu
Gregory Worrell
Pin-Yuan Chen
Publication date
01-05-2019
Publisher
Springer US
Published in
Journal of Neuro-Oncology / Issue 3/2019
Print ISSN: 0167-594X
Electronic ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-019-03131-0

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