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. 2019 Oct;145(1):125-134.
doi: 10.1007/s11060-019-03278-w. Epub 2019 Sep 6.

Survival impacts of extent of resection and adjuvant radiotherapy for the modern management of high-grade meningiomas

Depei Li  1 , Pingping Jiang  2 , Shijie Xu  1 , Cong Li  1 , Shaoyan Xi  3 , Ji Zhang  1 , Yinsheng Chen  1 , Xiaobing Jiang  1 , Xiangheng Zhang  1 , Ke Sai  1 , Jian Wang  1 , Yonggao Mou  1 , Chao Ke  4 , Zhongping Chen  5
Affiliations

Survival impacts of extent of resection and adjuvant radiotherapy for the modern management of high-grade meningiomas

Depei Li et al. J Neurooncol. 2019 Oct.

Abstract

Purpose: We aim to investigate the impacts of extent of resection and adjuvant radiotherapy on survival of high-grade meningiomas (WHO grade II-III) according to modern diagnosis and management.

Methods: Patients with high-grade meningiomas were identified in the Surveillance Epidemiology and End Results (SEER) database between 2000 and 2015 and used for survival analysis. Propensity score matching (PSM) was conducted to reduce selection bias. Another 92 patients from Sun Yat-sen University Cancer Center (SYSUCC) were used for validation.

Results: 530 patients were enrolled from SEER. Patients with gross total resection (GTR) had no significantly different overall survival (OS) compared with those with subtotal resection (STR), even after performing PSM between these two groups. Multivariable analysis found that age ≥ 65 years (HR 2.22, P < 0.001), tumor diameter > 6 cm (HR 1.59, P = 0.004) and grade III tumor (HR 4.31, P < 0.001) were associated with worse OS. Stratification analysis showed that adjuvant radiotherapy conferred significantly improved OS for grade III meningiomas, but not for grade II meningiomas, regardless of resection extent. In SYSUCC cohort, resection extent was also not significantly associated with OS. However, patients with GTR (Simpson grade I-III) had distinctly increased progression-free survival (PFS) than those with STR (P < 0.001). Additionally, for grade II meningiomas after GTR, radiotherapy was unable to improve OS and PFS.

Conclusion: On modern management of high-grade meningiomas, GTR does not improve OS, but seems to be associated with increased PFS. Radiotherapy is reasonable as a supplement for treating grade III meningiomas, whereas its effect for grade II meningiomas remains uncertain and needs further validation by prospective study.

Keywords: Extent of resection; Meningioma; Propensity score matching; Radiotherapy; SEER.

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Conflict of interest statement

There no conflict of interest.

Figures

Fig. 1
Fig. 1
Kaplan–Meier plot for extent of resection on patients with high-grade meningiomas. a Overall survival analysis for SEER cohort before PSM; b Overall survival analysis for SEER cohort after PSM; c Progression-free survival analysis for SYSUCC cohort; d Overall survival analysis for SYSUCC cohort. PSM propensity score matching, GTR gross total resection, STR subtotal resection
Fig. 2
Fig. 2
Kaplan–Meier plot for adjuvant radiotherapy on patients in the SEER cohort with grade II meningiomas after GTR (a), grade II with meningiomas after STR (b); grade III meningiomas after GTR (c), and grade III meningiomas after STR (d). GTR gross total resection, STR subtotal resection, RT radiotherapy
See this image and copyright information in PMC

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