Abstract
Background
The onset of castration-resistance is associated with dismal outcomes in patients with prostate cancer (PCa). Metastasis directed therapy has been investigated in multiple disease settings and may improve outcomes in selected patients. Our systematic review aims to summarize evidence with stereotactic body radiotherapy (SBRT) in castration-resistant prostate cancer (CRPC).
Methods
The literature search was performed on March 2024, on Pubmed, using the keywords “SBRT” AND “CRPC”, and “stereotactic ablative radiotherapy (SABR)” AND “CRPC”. This search retrieved a total of 108 articles, 19 were included.
Results
The literature is largely dominated by retrospective series. In men with metachronous oligoprogression, SBRT with androgen receptor pathway inhibitor significantly increased progression-free survival (PFS) including biochemical progression-free survival in a randomized phase II trial (hazard ratio of 0.35, p < 0.001). In patients continuing ADT, the bPFS ranged between 9.5 months to 17.9 months, and next systemic treatment-free survival (NEST-FS) reached up to 2 years. In men with induced oligoprogression, SBRT enabled NEST-FS up to 3 years. SBRT was well tolerated, with less than 5% grade 3 toxicity reported across studies.
Conclusion
In the population of patients with oligometastatic CRPC, SBRT enables long-term biochemical response and PFS. In the oligoprogressive setting, SBRT could be integrated to prolong the duration and efficacy of systemic therapies. Nevertheless, the level of evidence remains very low and inclusion within prospective trials remain the preferred option for this population of patients.
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Jennifer Le Guevelou: conceived and designed the analysis, collected the data, contributed in data analysis, contributed in the writing process; Francesco Cuccia: conceived and designed the analysis, collected the data, contributed in data analysis, contributed in the writing process; Ronan Flippot: contributed in data analysis, contributed in the writing process; Giuseppe Ferrera: contributed in data analysis, contributed in the writing process; Mario Terlizzi: contributed in data analysis, contributed in the writing process; Thomas Zilli: contributed in data analysis, contributed in the writing process; Renaud De Crevoisier: contributed in data analysis, contributed in the writing process; Jean-Michel Hannoun-Levi: contributed in data analysis, contributed in the writing process; Stephane Supiot: contributed in data analysis, contributed in the writing process; Paul Sargos: contributed in data analysis, contributed in the writing process; David Pasquier: conceived and designed the analysis, contributed in data analysis, contributed in the writing process.
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Le Guevelou, J., Cuccia, F., Flippot, R. et al. The current landscape of stereotactic body radiation therapy for metastatic castration-resistant prostate cancer. Prostate Cancer Prostatic Dis 28, 546–556 (2025). https://doi.org/10.1038/s41391-024-00862-8
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DOI: https://doi.org/10.1038/s41391-024-00862-8
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