Stereotactic body radiation therapy for clinically localized prostate cancer

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Abstract

Background. In the last decade, we observed a significant increase in the number of patients undergoing radiotherapy for prostate cancer (PC). It became possible with the development of new equipment that can significantly increase radiation efficiency and reduce the frequency and severity of side effects. Active investigation of new fractionation regimens led to the development of stereotactic radiotherapy (StR) technique. In this article, we describe our own experience of using StR in patients with localized PC. Material and methods. The study included 48 patients treated with CyberKnife robotic radiosurgery system. The patients received a total dose of 36.25 Gy delivered in 5 fractions. Results. At a median follow-up of 24 months, the estimated four-year prostate-specific antigen (PSA) relapse-free survival rate was 95.8 %. The median PSA nadir was 0.48 ng/mL. We observed no grade III-IV side effects (either early or late). Conclusion. Our results suggest that the use of StR allows achieving good biochemical control comparable to that achieved by other methods and demonstrates comparable and sometimes even lower toxicity.

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Vorobyov, N. A., Martynova, N. I., Mikhailov, A. V., Gutsalo, Y. V., & Kubasov, A. V. (2018). Stereotactic body radiation therapy for clinically localized prostate cancer. Onkourologiya, 14(2), 122–129. https://doi.org/10.17650/1726-9776-2018-14-2-122-129

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