Stereotactic body radiotherapy (SBRT) for pulmonary metastases from renal cell carcinoma: a multicenter analysis of the German working group “Stereotactic Radiotherapy”

Background: Renal cell carcinoma (RCC) is traditionally considered to be radioresitant. Radiotherapy response rates are believed to improve with hypofractionated, high dose stereotactic body radiotherapy (SBRT). However, limited data exist regrading the role of SBRT in the treatment of pulmonary met...

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Hauptverfasser: Hörner-Rieber, Juliane (VerfasserIn) , Boda-Heggemann, Judit (VerfasserIn) , Rieken, Stefan (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: November 2017
In: Journal of thoracic disease
Year: 2017, Jahrgang: 9, Heft: 11, Pages: 4512-4522
ISSN:2077-6624
DOI:10.21037/jtd.2017.10.108
Online-Zugang:Verlag, kostenfrei, Volltext: http://dx.doi.org/10.21037/jtd.2017.10.108
Verlag, kostenfrei, Volltext: http://jtd.amegroups.com/article/view/16963
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Verfasserangaben:Juliane Hoerner-Rieber, Marciana Duma, Oliver Blanck, Guido Hildebrandt, Andrea Wittig, Fabian Lohaus, Michael Flentje, Frederick Mantel, Robert Krempien, Michael J. Eble, Klaus Henning Kahl, Judit Boda-Heggemann, Stefan Rieken, Matthias Guckenberger

MARC

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520 |a Background: Renal cell carcinoma (RCC) is traditionally considered to be radioresitant. Radiotherapy response rates are believed to improve with hypofractionated, high dose stereotactic body radiotherapy (SBRT). However, limited data exist regrading the role of SBRT in the treatment of pulmonary metastases. Methods: The working group “Stereotactic Radiotherapy” of the German Society of Radiation Oncology analyzed its multi-institutional database of more than 700 patients who received SBRT for pulmonary metastases. Treatment was performed at 10 centers between 2001 and 2016. Patients with metastatic RCC were included in the study. Tumor characteristics, treatment details, and follow-up data including survival, local control (LC), distant metastases, and toxicity were evaluated. Results: A total of 46 RCC patients treated with SBRT for 67 lung metastases were identified, who received a median total biologically effective dose (BED iso ) at planning target volume (PTV) isocenter of 117.0 Gy (range, 48.0-189.0 Gy). A median fractional dose of 20.8 Gy at isocenter (range, 6.0-37.9 Gy) was administered in a median number of 3 fractions (1-8 fractions). After a median follow-up time of 28.3 months for all patients, 1- and 3-year LC rates were 98.1% and 91.9%, with corresponding 1- and 3-year overall survival (OS) of 84.3% and 43.8%, respectively. Pulmonary metastases treated with BEDiso ≥130 Gy showed a trend for superior LC (P=0.054). OS was significantly improved in both uni- and multivariate analysis for patients with higher Karnofsky performance scale, lower maximum pulmonary metastasis diameter and lack of post-SBRT systemic therapy due to progression (P=0.014; P=0.049; P=0.006). Only mild acute and late toxicity was reported. Conclusions: SBRT for pulmonary metastases from RCC was associated with low treatment-associated toxicity, promising survival, and excellent LC, especially in those patients receiving a BED iso ≥130 Gy. 
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