You have accessJournal of UrologyProstate Cancer: Localized: Radiation Therapy (PD08)1 Sep 2021PD08-06 TREATMENT-RELATED TOXICITY USING PROSTATE BED VERSUS PROSTATE BED AND PELVIC LYMPH NODE RADIATION THERAPY FOLLOWING RADICAL PROSTATECTOMY: A NATIONAL POPULATION-BASED STUDY Matthew Parry, Arunan Sujenthiran, Julie Nossiter, Melanie Morris, Brendan Berry, Paul Cathcart, Noel Clarke, Heather Payne, Jan van der Meulen, and Ajay Aggarwal Matthew ParryMatthew Parry More articles by this author , Arunan SujenthiranArunan Sujenthiran More articles by this author , Julie NossiterJulie Nossiter More articles by this author , Melanie MorrisMelanie Morris More articles by this author , Brendan BerryBrendan Berry More articles by this author , Paul CathcartPaul Cathcart More articles by this author , Noel ClarkeNoel Clarke More articles by this author , Heather PayneHeather Payne More articles by this author , Jan van der MeulenJan van der Meulen More articles by this author , and Ajay AggarwalAjay Aggarwal More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000001976.06AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: There is debate about the effectiveness and toxicity of pelvic lymph node (PLN) irradiation when used for disease recurrence following radical prostatectomy. This study compared the toxicity of radiation therapy (RT) to the prostate bed and pelvic lymph nodes (PBPLN-RT) with prostate-bed only radiation therapy (PBO-RT). METHODS: Patients with prostate cancer who underwent post-prostatectomy RT in the English National Health Service between 2010-2016 were identified by using data from the Cancer Registry, the National Radiotherapy Dataset, and Hospital Episode Statistics, an administrative database of all hospital admissions. Follow-up was available up to December 31, 2018. Validated indicators were used to identify patients with ≥ Grade 2 gastrointestinal (GI) and genitourinary (GU) toxicity according to the presence of both a procedure code and diagnostic code in patient Hospital Episode Statistics records. A competing risks regression analysis, with adjustment for patient and tumour characteristics, estimated subdistribution hazard ratios by comparing GI and GU toxicity for PBPLN-RT vs PBO-RT. RESULTS: 5-year cumulative incidences in the PBO-RT (n= 5,087) and PBPLN-RT (n= 593) groups was 18.2% and 15.9% for GI toxicity, respectively. For GU toxicity it was and 19.1% and 20.7%, respectively. There was no difference in GI or GU toxicity between PBO-RT and PBPLN-RT (GI: adjusted sHR, 0.90, 95% CI, 0.67 to 1.19; p= 0.45); (GU: adjusted sHR, 1.18, 95% CI, 0.98 to 1.44; p= 0.09). CONCLUSIONS: Including PLNs in the radiation field following radical prostatectomy is not associated with a significant increase in rates of ≥ Grade 2 GI or GU toxicity at 5 years. Source of Funding: M.G.P. was supported by the National Institute of Health Research (DRF-2018-11-ST2-036). T.E.C. was supported by the Medical Research Council (MR/S020470/1). B.B. was partly supported by the NHS National Institute for Health Research through an Academic Clinical Fellowship. H.P. was supported by the University College London Hospitals/University College London Comprehensive Biomedical Research Centre. J.v.d.M. was partly supported by the National Institute for Health Research Collaboration for Leadership in Applied Health Research and Care North Thames at Bart’s Health NHS Trust. The views expressed in this article are those of the authors and not necessarily those of the NHS, the National Institute for Health Research or the Department of Health and Social Care © 2021 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 206Issue Supplement 3September 2021Page: e115-e116 Advertisement Copyright & Permissions© 2021 by American Urological Association Education and Research, Inc.MetricsAuthor Information Matthew Parry More articles by this author Arunan Sujenthiran More articles by this author Julie Nossiter More articles by this author Melanie Morris More articles by this author Brendan Berry More articles by this author Paul Cathcart More articles by this author Noel Clarke More articles by this author Heather Payne More articles by this author Jan van der Meulen More articles by this author Ajay Aggarwal More articles by this author Expand All Advertisement Loading ...
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