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. 2019 Feb 14;21(2):179-188.
doi: 10.1093/neuonc/noy166.

Supratotal resection in glioma: a systematic review

Affiliations

Supratotal resection in glioma: a systematic review

Charles N de Leeuw et al. Neuro Oncol. .

Abstract

Background: Emerging evidence suggests survival benefit from resection beyond all MRI abnormalities present on T1-enhanced and T2‒fluid attenuated inversion recovery (FLAIR) modalities in glioma (supratotal resection); however, the quality of evidence is unclear. We addressed this question via systematic review of the literature.

Methods: EMBASE, MEDLINE, Scopus, and Web of Science databases were queried. Case studies, reviews or editorials, non-English, abstract-only, brain metastases, and descriptive works were excluded. All others were included.

Results: Three hundred and nine unique references yielded 41 studies for full-text review, with 7 included in the final analysis. Studies were mostly of Oxford Center for Evidence-Based Medicine Level 4 quality. A total of 88 patients underwent supratotal resection in a combined cohort of 492 patients (214 males and 278 females, age 18 to 82 years). Fifty-one supratotal resections were conducted on high-grade gliomas, and 37 on low-grade gliomas. Karnofsky performance status, overall survival, progression-free survival, neurological deficits postoperatively, and anaplastic transformation were the main measured outcomes. No randomized controlled trials were identified. Preliminary low-quality support was found for supratotal resection in increasing overall survival and progression-free survival for both low-grade and high-grade glioma.

Conclusion: The literature suggests insufficient evidence for carte blanche application of supratotal resection, particularly in lower-grade gliomas where neurological deficits can result in long-term disability. While the preliminary studies discussed here, containing data from only a few centers, have reported increased progression-free and overall survival, these claims require validation in prospective research studies involving larger patient populations with clearly defined appropriate outcome metrics in order to reduce potential bias.

Keywords: FLAIR; glioma; resection; supratotal; surgery.

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Figures

Fig. 1
Fig. 1
PRISMA flow diagram. EMBASE, MEDLINE, Scopus, and Web of Science were exhaustively searched for articles concerning supratotal resection in glioma, with reference lists also used as article sources. A total of 309 unique entries were considered for inclusion; 41 articles proceeded to full-text analysis, with 7 satisfying criteria for qualitative review, and 0 satisfying criteria for quantitative analysis.

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