Abstract
Purpose
A prospective multicenter phase I/II trial was performed to evaluate the clinical safety and efficacy of radiofrequency ablation (RFA) for metastatic bone tumors.
Materials and Methods
Thirty-three patients (27 men, 6 women, mean age 61 years) with metastatic bone tumors were enrolled. In phase I, nine patients were enrolled, and the safety of RFA was evaluated. In phase II, 23 patients were included, and an intent-to-treat analysis was performed. The primary endpoint was to evaluate the treatment’s safety. The secondary endpoint was to evaluate the efficacy of pain relief at 1 week after RFA.
Results
RFA was performed in 32 of 33 enrolled patients. No serious complications were observed during the phase I, so phase II was performed. Four patients exhibited adverse events, including one case each of Grade 3 pain and, Grade 2 hypotension, and one patient developed Grade 1 burns at the grounding pad and puncture site. One patient died of liver failure on day 7 after RFA due to the progression of the primary lesion. The efficacy was excellent (no increase in analgesic dosage, post-RFA VAS score of 0–2 or decreased by not less than 5 compared to before RFA) in 20 patients (60.6%), good (no increase in analgesic dosage, post-RFA VAS score decreased by not less than 2 but by < 5 compared to before RFA) in 3 (9.1%), and poor in 10 patients (30.3%). Thus, the response rate was 69.7%.
Conclusion
RFA is a safe and effective method for treating painful metastatic bone tumors.
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Acknowledgements
This research was supported by the Practical Research for Innovative Cancer Control (16ck0106058h0003) from the Japan Agency for Medical Research and Development (AMED), Health and Labor Sciences Research Grant (H26-055) from the Ministry of Health, Labour and Welfare of Japan, and the National Cancer Center Research and Development Fund (26-A-27).
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Ethical Approval
The ethics committee of the Japanese Society of Interventional Radiology and the Institutional Review Board from each participating hospital approved the study protocol prior to patient entry. All of the patients provided written informed consent.
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Informed consent was obtained from all individual participants included in the study.
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Tanigawa, N., Arai, Y., Yamakado, K. et al. Phase I/II Study of Radiofrequency Ablation for Painful Bone Metastases: Japan Interventional Radiology in Oncology Study Group 0208. Cardiovasc Intervent Radiol 41, 1043–1048 (2018). https://doi.org/10.1007/s00270-018-1944-x
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DOI: https://doi.org/10.1007/s00270-018-1944-x