PMID- 34740548 OWN - NLM STAT- MEDLINE DCOM- 20220429 LR - 20220531 IS - 1938-0682 (Electronic) IS - 1558-7673 (Linking) VI - 20 IP - 1 DP - 2022 Feb TI - The Journey of Radiotherapy Dose Escalation in High Risk Prostate Cancer; Conventional Dose Escalation to Stereotactic Body Radiotherapy (SBRT) Boost Treatments. PG - e25-e38 LID - S1558-7673(21)00187-7 [pii] LID - 10.1016/j.clgc.2021.09.004 [doi] AB - High risk prostate cancer (HR-PrCa) is a subset of localized PrCa with significant potential for morbidity and mortality associated with disease recurrence and metastasis. Radiotherapy combined with Androgen Deprivation Therapy has been the standard of care for many years in HR-PrCa. In recent years, dose escalation, hypo-fractionation and high precision delivery with immobilization and image-guidance have substantially changed the face of modern PrCa radiotherapy, improving treatment convenience and outcomes. Ultra-hypo-fractionated radiotherapy delivered with high precision in the form of stereotactic body radiation therapy (SBRT) combines delivery of high biologically equivalent dose radiotherapy with the convenience of a shorter treatment schedule, as well as the promise of similar efficacy and reduced toxicity compared to conventional radiotherapy. However, rigorous investigation of SBRT in HR-PrCa remains limited. Here, we review the changes in HR-PrCa radiotherapy through dose escalation, hypo- and ultra-hypo-fractionated radiotherapy boost treatments, and the radiobiological basis of these treatments. We focus on completed and on-going trials in this disease utilizing SBRT as a sole radiation modality or as boost therapy following pelvic radiation. CI - Copyright (c) 2021. Published by Elsevier Inc. FAU - Mesci, Aruz AU - Mesci A AD - Radiation Oncology, Juravinski Cancer Centre, Hamilton Health Sciences Centre, Department of Oncology, McMaster University, Hamilton, Ontario, Canada. FAU - Isfahanian, Naghmeh AU - Isfahanian N AD - Radiation Oncology, Juravinski Cancer Centre, Hamilton Health Sciences Centre, Department of Oncology, McMaster University, Hamilton, Ontario, Canada. Electronic address: naghmeh.isfahanian@gmail.com. FAU - Dayes, Ian AU - Dayes I AD - Radiation Oncology, Juravinski Cancer Centre, Hamilton Health Sciences Centre, Department of Oncology, McMaster University, Hamilton, Ontario, Canada. FAU - Lukka, Himu AU - Lukka H AD - Radiation Oncology, Juravinski Cancer Centre, Hamilton Health Sciences Centre, Department of Oncology, McMaster University, Hamilton, Ontario, Canada. FAU - Tsakiridis, Theodoros AU - Tsakiridis T AD - Radiation Oncology, Juravinski Cancer Centre, Hamilton Health Sciences Centre, Department of Oncology, McMaster University, Hamilton, Ontario, Canada. Electronic address: theos.tsakiridis@hhsc.ca. LA - eng PT - Journal Article PT - Review DEP - 20211008 PL - United States TA - Clin Genitourin Cancer JT - Clinical genitourinary cancer JID - 101260955 RN - 0 (Androgen Antagonists) SB - IM MH - Androgen Antagonists/therapeutic use MH - Dose Fractionation, Radiation MH - Humans MH - Male MH - Neoplasm Recurrence, Local MH - *Prostatic Neoplasms/pathology/surgery MH - *Radiosurgery/adverse effects/methods OTO - NOTNLM OT - High risk prostate cancer OT - Prostate Radiotherapy OT - Prostate cancer OT - Stereotactic body radiotherapy EDAT- 2021/11/07 06:00 MHDA- 2022/04/30 06:00 CRDT- 2021/11/06 05:29 PHST- 2021/01/29 00:00 [received] PHST- 2021/07/08 00:00 [revised] PHST- 2021/09/27 00:00 [accepted] PHST- 2021/11/07 06:00 [pubmed] PHST- 2022/04/30 06:00 [medline] PHST- 2021/11/06 05:29 [entrez] AID - S1558-7673(21)00187-7 [pii] AID - 10.1016/j.clgc.2021.09.004 [doi] PST - ppublish SO - Clin Genitourin Cancer. 2022 Feb;20(1):e25-e38. doi: 10.1016/j.clgc.2021.09.004. Epub 2021 Oct 8.