PMID- 29609646 OWN - NLM STAT- MEDLINE DCOM- 20190618 LR - 20190618 IS - 1745-6215 (Electronic) IS - 1745-6215 (Linking) VI - 19 IP - 1 DP - 2018 Apr 2 TI - Stereotactic body-radiotherapy boost dose of 18 Gy vs 21 Gy in combination with androgen-deprivation therapy and whole-pelvic radiotherapy for intermediate- or high-risk prostate cancer: a study protocol for a randomized controlled, pilot trial. PG - 212 LID - 10.1186/s13063-018-2574-y [doi] LID - 212 AB - BACKGROUND: Combination therapy using external-beam radiotherapy (EBRT) with a brachytherapy boost has demonstrated superior biochemical control than dose-escalated EBRT alone. Whereas brachytherapy is disadvantageous because it is an invasive procedure, stereotactic body-radiotherapy (SBRT) using CyberKnife could emulate the dose distribution of brachytherapy and is a non-invasive and safe modality to control intra-fractional movement. We therefore adopted SBRT using CyberKnife as a boost therapy after whole-pelvic radiotherapy (WPRT). METHODS/DESIGN: In this prospective, randomized, single-center, pilot study for intermediate- and high-risk prostate cancer without nodal or distant metastasis, after androgen-deprivation therapy and WPRT, patients will be randomized to one of two SBRT boost regimens, i.e., 18 or 21 Gy administered in three fractions every other day. DISCUSSION: The aim of this trial is to evaluate acute toxicities using both physician- and patient-reported outcomes and short-term biochemical control with SBRT boost following WPRT. Additionally, chronic toxicities and long-term biochemical control will be evaluated as secondary endpoints in this trial. Based on the generated results, we will plan the full-scale phase II study for selecting the SBRT boost dose. TRIAL REGISTRATION: ClinicalTrials.gov, ID; NCT03322020 . Retrospectively registered on 26 October 2017. FAU - Kim, Yeon Joo AU - Kim YJ AD - Department of Radiation Oncology, Asan Medical Center, University of Ulsan, College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea. FAU - Ahn, Hanjong AU - Ahn H AD - Department of Urology, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Republic of Korea. FAU - Kim, Choung-Soo AU - Kim CS AD - Department of Urology, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Republic of Korea. FAU - Lee, Jae-Lyun AU - Lee JL AD - Department of Oncology, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Republic of Korea. FAU - Kim, Young Seok AU - Kim YS AD - Department of Radiation Oncology, Asan Medical Center, University of Ulsan, College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea. ysk@amc.seoul.kr. LA - eng SI - ClinicalTrials.gov/NCT03322020 GR - 2016-0314/Asan Institute for Life Sciences, Asan Medical Center/ PT - Clinical Trial Protocol PT - Journal Article DEP - 20180402 PL - England TA - Trials JT - Trials JID - 101263253 RN - 0 (Androgen Antagonists) RN - 0 (Antineoplastic Agents) SB - IM MH - Androgen Antagonists/adverse effects/*therapeutic use MH - Antineoplastic Agents/adverse effects/*therapeutic use MH - Chemoradiotherapy/adverse effects/*methods MH - *Dose Fractionation, Radiation MH - Humans MH - Male MH - Patient Reported Outcome Measures MH - Pilot Projects MH - Prospective Studies MH - Prostatic Neoplasms/pathology/*therapy MH - *Radiosurgery/adverse effects MH - Randomized Controlled Trials as Topic MH - Risk Factors MH - Seoul MH - Time Factors MH - Treatment Outcome PMC - PMC5879839 OTO - NOTNLM OT - External-beam radiotherapy OT - Prostate cancer OT - Stereotactic radiotherapy boost COIS- ETHICS APPROVAL AND CONSENT TO PARTICIPATE: Approval to conduct this study (version 1.1 on 21 March 2016) was granted by the Institutional Review Board of Seoul Asan Medical Center (S2016-0351), and patient consent will be obtained before randomization. CONSENT FOR PUBLICATION: Not applicable COMPETING INTERESTS: The authors declare that they have no competing interests. PUBLISHER'S NOTE: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. EDAT- 2018/04/04 06:00 MHDA- 2019/06/19 06:00 PMCR- 2018/04/02 CRDT- 2018/04/04 06:00 PHST- 2018/01/02 00:00 [received] PHST- 2018/03/01 00:00 [accepted] PHST- 2018/04/04 06:00 [entrez] PHST- 2018/04/04 06:00 [pubmed] PHST- 2019/06/19 06:00 [medline] PHST- 2018/04/02 00:00 [pmc-release] AID - 10.1186/s13063-018-2574-y [pii] AID - 2574 [pii] AID - 10.1186/s13063-018-2574-y [doi] PST - epublish SO - Trials. 2018 Apr 2;19(1):212. doi: 10.1186/s13063-018-2574-y.