Abstract
Objectives
The purpose of this study was to compare the efficacy of radiotherapy (RT) combined with transcatheter arterial chemoembolization (TACE) with RT alone for the treatment of bone metastases from renal cell carcinoma (RCC).
Methods
We included in this retrospective study 25 RCC patients (28 bone metastases), who were treated with RT at our institution. Patients were divided into two groups: patients treated with RT alone (monotherapy group; n = 17) and those treated with RT combined with TACE (combined therapy group; n = 11). The administered median RT dose was 30 Gy in 10 fractions. Anti-cancer agents used in TACE were cisplatin (median dose, 50 mg) and carboplatin (median dose, 240 mg) for patients with reduced renal function. We evaluated the objective response, post-RT-skeletal-related event (PR-SRE)–free rate, and adverse events associated with treatment for each group.
Results
The objective response rates for bone metastases in the monotherapy and combined therapy groups were 33% and 82%, respectively (p = 0.009). The 2-year PR-SRE-free rate in the monotherapy and combined therapy groups was 41.8% and 100%, respectively (p = 0.009). The objective response and PR-SRE-free rates were significantly superior in the combined therapy than in the monotherapy group. There were no significant differences in adverse events or survival between the two groups.
Conclusion
RT combined with TACE is a promising treatment for bone metastases from RCC, as it results in higher objective response, and PR-SRE-free rates compared with RT alone.
Key Points
• Skeletal-related events (SREs) are common in patients with bone metastases from renal cell carcinoma (RCC).
• Radiotherapy (RT) provides pain relief in patients with bone metastases from RCC, but rarely achieves objective response.
• Combination of RT with transcatheter arterial chemoembolization results in higher objective response and post-RT-SRE-free rates compared with RT alone and is a promising treatment for bone metastases from RCC, as it.
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Abbreviations
- BMA:
-
Bone-modifying agent
- CR:
-
Complete response
- CT:
-
Computed tomography
- ICI:
-
Immune checkpoint inhibitor
- MRI:
-
Magnetic resonance imaging
- MTT:
-
Molecularly targeted therapy
- PD:
-
Progressive disease
- PR:
-
Partial response
- PR-SRE:
-
Post-radiotherapy-skeletal-related event
- QOL:
-
Quality of life
- RCC:
-
Renal cell carcinoma
- RT:
-
Radiotherapy
- SR:
-
Stable response
- SRE:
-
Skeletal-related event
- TACE:
-
Transcatheter arterial chemoembolization
- TAE:
-
Transcatheter arterial embolization
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Funding
This study was supported by a grant-in-aid of the Uruma Fund for the Promotion of Science.
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The scientific guarantor of this publication is Sadayuki Murayama.
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The authors declare that they have no conflict of interest.
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No complex statistical methods were necessary for this paper.
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Written informed consent was obtained from all subjects (patients) in this study.
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Institutional Review Board approval was obtained.
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• retrospective
• observational
• performed at one institution
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Heianna, J., Makino, W., Ariga, T. et al. Concomitant radiotherapy and transarterial chemoembolization reduce skeletal-related events related to bone metastases from renal cell carcinoma. Eur Radiol 30, 1525–1533 (2020). https://doi.org/10.1007/s00330-019-06454-8
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DOI: https://doi.org/10.1007/s00330-019-06454-8