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Sujenthiran A, Parry MG, Dodkins J, Nossiter J, Morris M, Berry B, Nathan A, Cathcart P, Clarke NW, Payne H, van der Meulen J, Aggarwal A. Treatment-related toxicity using prostate bed versus prostate bed and pelvic lymph node radiation therapy following radical prostatectomy: A national population-based study. Clin Transl Radiat Oncol 2023; 40:100622. [PMID: 37152844 PMCID: PMC10159812 DOI: 10.1016/j.ctro.2023.100622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 03/08/2023] [Accepted: 03/25/2023] [Indexed: 05/09/2023] Open
Abstract
Purpose There is debate about the effectiveness and toxicity of pelvic lymph node (PLN) irradiation in addition to prostate bed radiotherapy when used to treat disease recurrence following radical prostatectomy. We compared toxicity from radiation therapy (RT) to the prostate bed and pelvic lymph nodes (PBPLN-RT) with prostatebed only radiation therapy (PBO-RT) following radical prostatectomy. Methods and Materials Patients with prostate cancer who underwent post-prostatectomy RT between 2010 and 2016 were identified by using the National Prostate Cancer Audit (NPCA) database. Follow-up data was available up to December 31, 2018. Validated outcome measures, based on a framework of procedural and diagnostic codes, were used to capture ≥Grade 2 gastrointestinal (GI) and genitourinary (GU) toxicity. An adjusted competing-risks regression analysis estimated subdistribution hazard ratios (sHR). A sHR > 1 indicated a higher incidence of toxicity with PBPLN-RT than with PBO-RT. Results 5-year cumulative incidences in the PBO-RT (n = 5,087) and PBPLNRT (n = 593) groups was 18.2% and 15.9% for GI toxicity, respectively. For GU toxicity it was 19.1% and 20.7%, respectively. There was no evidence of difference in GI or GU toxicity after adjustment between PBO-RT and PBPLN-RT (GI: adjusted sHR, 0.90, 95% CI, 0.67-1.19; P = 0.45); (GU: adjusted sHR, 1.19, 95% CI, 0.99-1.44; P = 0.09). Conclusions This national population-based study found that 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.
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Affiliation(s)
- Arunan Sujenthiran
- Clinical Effectiveness Unit, Royal College of Surgeons of England, UK
- Flatiron Health, UK
| | - Matthew G. Parry
- Clinical Effectiveness Unit, Royal College of Surgeons of England, UK
- Department of Health Services Research & Policy, LHSTM, UK
| | - Joanna Dodkins
- Clinical Effectiveness Unit, Royal College of Surgeons of England, UK
- Department of Health Services Research & Policy, LHSTM, UK
- Corresponding authors at: Clinical Effectiveness Unit, Royal College of Surgeons of England, 35-43 Lincoln’s Inn Fields, London WC2A 3PE, England, UK.
| | - Julie Nossiter
- Department of Health Services Research & Policy, LHSTM, UK
| | - Melanie Morris
- Clinical Effectiveness Unit, Royal College of Surgeons of England, UK
- Department of Health Services Research & Policy, LHSTM, UK
| | - Brendan Berry
- Clinical Effectiveness Unit, Royal College of Surgeons of England, UK
- Department of Health Services Research & Policy, LHSTM, UK
| | - Arjun Nathan
- Clinical Effectiveness Unit, Royal College of Surgeons of England, UK
| | - Paul Cathcart
- Department of Urology, Guy’s & St Thomas’ NHS Foundation Trust, UK
| | - Noel W. Clarke
- Department of Urology, The Christie & Salford Royal NHS Foundation Trusts, UK
| | - Heather Payne
- Department of Oncology, University College London Hospitals, London, UK
| | | | - Ajay Aggarwal
- Department of Health Services Research & Policy, LHSTM, UK
- Department of Radiotherapy, Guy’s & St Thomas’ NHS Foundation Trust, UK
- Department of Cancer Epidemiology, Population & Global Health, KCL, UK
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