Article (Scientific journals)
Surgical bed stereotactic radiotherapy of brain metastases: Clinical outcome and predictors of local and distant brain failure
Mousli, A.; Bihin, B.; Gustin, T. et al.
2020In Cancer Radiotherapie, 24 (4), p. 298-305
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Keywords :
Brain metastases; Local control; Postoperative; Stereotactic radiotherapy; Article; Adult; Aged; Aged, 80 and over; Brain Neoplasms; Cranial Irradiation; Female; Humans; Male; Margins of Excision; Meningeal Neoplasms; Middle Aged; Necrosis; Neoplasm Recurrence, Local; Progression-Free Survival; Radiation Injuries; Radiosurgery; Radiotherapy Dosage; Retrospective Studies; Salvage Therapy; Treatment Outcome; Tumor Burden
Abstract :
[en] Purpose: To retrospectively analyze the outcomes of stereotactic radiotherapy (SRT) targeted at surgical bed of brain metastases (BM) and identify patterns of local/distant brain relapses (LR/DBR). Patients/methods: Seventy patients were treated with SRT between 2008–2017. Marginal dose prescription on the 70% isodose line depended on the maximal diameter of the target volume and range between 15–18 Gy for single fraction radiosurgery and 23.1–26 Gy in 3–5 fractions for fractionated SRT. Results: At 12 months, the overall survival (OS) was 69% [CI 95% = 59%–81%]. At 6 and 12 months, the cumulative incidence functions (CIF) of local relapse were 4% [1%–13%] and 15% [8%–26%], respectively. According to univariate analysis, factors associated with LR were an initial volume larger than 7cc (hazard ratio: 4.6 [1.0–20.8], P = 0.046) and a positive resection margin [hazard ratio: 3.6 [1.1–12.0], P = 0.037. DBR occurred in 54.3% of patients with a median time of 8 months. None of the variables tested (histology, location or number of lesions) were found correlated with the DBR. Leptomeningeal disease occurred in 12.9% of cases. Salvage whole brain radiotherapy (WBRT) was required in 45.7% of patients and delayed by a median time of 9.6 months. Symptomatic radionecrosis (RN) occurred in 7.1%. Conclusions: Adjuvant SRT was an effective and well-tolerated treatment to control the postoperative risk of recurrence of BM without compromising OS. Positive resection margins and large volumes were predictors factor of local relapse. © 2020
Disciplines :
Oncology
Author, co-author :
Mousli, A.;  Radiation Oncology, université catholique de Louvain, CHU-UCL-Namur, site Sainte-Elisabeth, Namur, Belgium, Radiation Oncology Department, centre François-Baclesse, Esch-sur-Alzette, Luxembourg
Bihin, B.;  Biostatistics Unit, université catholique de Louvain, CHU-UCL-Namur, site Godinne, Yvoir, Belgium
Gustin, T.;  Neurosurgery, université catholique de Louvain, CHU-UCL-Namur, site Godinne, Yvoir, Belgium
Koerts, G.;  Neurosurgery, centre hospitalier régional Sambre-et-Meuse, Namur, Belgium
Mouchamps, Micheline ;  Université de Liège - ULiège
Daisne, J. F.;  Radiation Oncology, université catholique de Louvain, CHU-UCL-Namur, site Sainte-Elisabeth, Namur, Belgium, Radiation Oncology Department, Katholieke Universiteit Leuven, Universitaire Ziekehnhuis, Leuven, Belgium
Language :
English
Title :
Surgical bed stereotactic radiotherapy of brain metastases: Clinical outcome and predictors of local and distant brain failure
Alternative titles :
[fr] Radiothérapie stéréotaxique sur les berges opératoires des métastases cérébrales : résultats thérapeutiques et facteurs prédictifs de rechutes cérébrales locales et à distance
Publication date :
2020
Journal title :
Cancer Radiotherapie
ISSN :
1278-3218
eISSN :
1769-6658
Publisher :
Elsevier Masson, France
Volume :
24
Issue :
4
Pages :
298-305
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 31 July 2021

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