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Prognostic Factors for Survival in Patients with High-Grade Meningioma and Recurrence-Risk Stratification for Application of Radiotherapy

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Title: Prognostic Factors for Survival in Patients with High-Grade Meningioma and Recurrence-Risk Stratification for Application of Radiotherapy
Authors: Yamaguchi, Shigeru Browse this author
Terasaka, Shunsuke Browse this author →KAKEN DB
Kobayashi, Hiroyuki Browse this author
Asaoka, Katsuyuki Browse this author
Motegi, Hiroaki Browse this author
Nishihara, Hiroshi Browse this author →KAKEN DB
Kanno, Hiromi Browse this author
Onimaru, Rikiya Browse this author →KAKEN DB
Ito, Yoichi M. Browse this author
Shirato, Hiroki Browse this author →KAKEN DB
Houkin, Kiyohiro Browse this author →KAKEN DB
Issue Date: 12-May-2014
Publisher: Public Library of Science
Journal Title: PLOS One
Volume: 9
Issue: 5
Start Page: e97108
Publisher DOI: 10.1371/journal.pone.0097108
PMID: 24820480
Abstract: Background: Radiotherapy for high-grade meningioma (HGM) is one of the essential treatment options for disease control. However, appropriate irradiation timing remains under debate. The object of this study is to discern which prognostic factors impact recurrence in HGM patients and to propose a risk-stratification system for the application of postoperative radiotherapy. Methods: We retrospectively reviewed 55 adult patients who were diagnosed with Grade II and III intracranial meningioma. Cox regression models were applied to the analysis for impact on early recurrence in HGM patients without postoperative radiotherapy. Results: Grade III malignancy (P = 0.0073) and transformed histology (P = 0.047) proved to be significantly poor prognostic factors of early recurrence by multivariate analysis. The other candidates for recurrence factors were Simpson Grade 3-5 resection, preoperative Karnofsky Performance status, <= 70%, and MIB-1 labeling index >= 15%. According to these prognostic factors, postoperative HGM patients could be stratified into three recurrence-risk groups. The prognoses were significantly different between each group, as the 3-year actual recurrence-free rates were 90% in low-risk group, 31% in intermediate-risk group, and 15% in high-risk group. Conclusion: We propose recurrence-risk stratification for postoperative HGM patients using clinically available factors. Our results suggest that the prognosis for patients with high-risk HGMs is dismal, whereas HGM patients belonging to the low-risk group could have favorable prognoses. This stratification provides us with the criteria necessary to determine whether to apply adjuvant radiotherapy to postoperative HGM patients, and to also help identify potentially curable HGMs without adjuvant radiotherapy.
Rights: http://creativecommons.org/licenses/by/3.0/
Type: article
URI: http://hdl.handle.net/2115/56606
Appears in Collections:国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 寺坂 俊介

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