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Introduction: Bone metastases (BM) in renal cell carcinoma (RCC) are associated with a poor prognosis based on retrospective studies evaluating antiangiogenic agents. Few data are available regarding immune checkpoint inhibitors (ICI) in patients with bone metastatic RCC. NIVOREN is a multicentre prospective study in which patients were treated with nivolumab after the failure of antiangiogenic agents. We aim to assess the impact of BM on prognosis, and the efficacy and safety of nivolumab in patients enrolled in the NIVOREN trial., Materials and Methods: All patients with BM at inclusion were included in our study. The primary endpoint was overall survival (OS). Secondary endpoints were progression-free survival (PFS), objective response rate (ORR), safety, and skeletal-related events (SRE)., Results: Among 720 patients treated with nivolumab, 194 presented BM at inclusion. The median follow-up was 23.9 months. Median OS was 17.9 months in patients with BM versus 26.1 months in patients without BM (p = 0.0023). The difference was not statistically significant after adjustment (p = 0.0707). The median PFS was shorter in patients with BM even after adjustment (2.8 versus 4.6 months, p = 0.0045), as well as the ORR (14.8% versus 23.3%). SRE occurred for 36% of patients with BM. A post-hoc analysis evaluating the impact of bone-targeting agents (BTA) on SRE incidence showed a significant benefit of BTA on the incidence of SRE (OR = 0.367, CI95% [0.151-0.895])., Conclusion: Nivolumab is associated with shorter PFS, and lower ORR in RCC patients with BM. Our study suggests that BTA in association with immunotherapy decreases the incidence of SRE., Competing Interests: Conflict of interest statement The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: MaudVELEV, Cecile Dalban, Florence Joly, Mathieu Laramas, Berangère Narciso, Jean-François BERDAH, Victoria FERRARI, Quentin Dominique THOMAS, Cecile Mione, Florence Tantot and Sylvie Chabaud have nothing to disclose. Christine Chevreau: consulting or advisory role – BMS; Ipsen; Novartis; Pfizer. Travel, accommodations, and expenses – AstraZeneca, BMS, Pfysez-Ipsen. Gwenaelle Gravis: AstraZeneca (Inst); Bayer (Inst); BMS (Inst); IPSEN (Inst); Janssen (Inst); MSD Oncology (Inst); Pfizer (Inst); Sanofi/Aventis (Inst). Speaker's: Amgen (Inst); Astellas Pharma (Inst); BMS (Inst); Ipsen (Inst); Janssen Oncology (Inst); MSD Oncology (Inst); Sanofi/Aventis (Inst), Research Funding: BMS. Sylvie Negrier: Honoraria: Bristol-Myers Squibb; Ipsen; MSD Oncology; Novartis; Pfizer. Consulting or advisory role – Bristol-Myers Squibb; Ipsen; MSD Oncology; Novartis; Pfizer. Research Funding: IPSEN (Inst); Pfizer (Inst). Travel, accommodations, and expenses – Bristol-Myers Squibb; IPSEN; Novartis; Pfizer. Brigitte Laguerre: Honoraria: Astellas Pharma; AstraZeneca; Ipsen; Ipsen; Ipsen; Janssen-Cilag; MSD Oncology. Travel, accommodations, and expenses – Astellas Pharma; Janssen; Janssen Oncology; Novartis; Pfizer. Marine Gross-Goupil: consulting or advisory role – Amgen; Astellas Medivation; AstraZeneca; Bayer/Onyx; Bristol-Myers Squibb; Ipsen; Janssen-Cilag; MSD Oncology; Pfizer; Roche; Sanofi. Research Funding – AstraZeneca (Inst); AstraZeneca (Inst); BMS (Inst); Ipsen (Inst); Janssen-Cilag (Inst); Merck (Inst); MSD Oncology (Inst); Pfizer (Inst); Roche (Inst). Sylvain Ladoire: Expert testimony – Astellas Pharma; Bristol-Myers Squibb; Ipsen; Janssen Oncology; Lilly; Novartis; Pfizer; Roche; Sanofi. Travel, accommodations, and expenses – Astellas Pharma; AstraZeneca; Bristol-Myers Squibb; Ipsen; Janssen Oncology; Novartis; Pfizer; Sanofi. Delphine Borchiellini has received consulting and advisory fees from Astellas Pharma, AstraZeneca, Bristol-Myers Squibb, Ipsen, Janssen-Cilag, MSD Oncology, Novartis, Pfizer, and Sanofi; research funding from Astellas Pharma, AstraZeneca, Bristol-Myers Squibb, Exelixis, Infinity Pharmaceuticals, Janssen, MSD, and Roche; and travel and accommodations expenses from Bristol-Myers Squibb, Janssen, Pfizer, and Roche. Lionnel Geoffrois: Honoraria: BMS; Ipsen; Merck serono; Pfizer. Consulting or advisory role – Ipsen. Frank Priou: consulting or advisory role – AstraZeneca. Philippe Barthélémy: Honoraria Astellas Pharma; BMS; IPSEN; Janssen-Cilag; Merck KGaA; MSD; Novartis; Pfizer. Consulting or advisory role – Amgen; AstraZeneca; BMS; Eisai; Ipsen; Janssen-Cilag; Merck KGaA; MSD Oncology; Pfizer. Travel, accommodations, and expenses – Astellas Pharma; BMS; IPSEN; Janssen-Cilag; MSD; Pfizer. Antoine Thiery-Vuillemin has received honoraria from Astellas Pharma, AstraZeneca, Bristol-Myers Squibb, Ipsen, Janssen, MSD, Novartis, Pfizer, Roche/Genentech, and Sanofi; consulting and advisory fees from Astellas Pharma, AstraZeneca, Bristol-Myers Squibb, Ipsen, Janssen, MSD, Novartis, Pfizer, Roche, and Sanofi; research funding from Pfizer; and travel and accommodations expenses from AstraZeneca, Bristol-Myers Squibb, Janssen, MSD, Pfizer, and Roche. Hubert Curcio: Honoraria or consultation fees: Bristol Myers Squibb. Stephane Oudard has received honoraria from Astellas Pharma, Bayer, Bristol-Myers Squibb, Eisai, Ipsen, Janssen, Merck, MSD, Novartis, Pfizer, Roche/Genentech, and Sanofi; consulting and advisory fees from Astellas Pharma, Bayer, Boehringer Ingelheim, Bristol-Myers Squibb, Eisai, Ipsen, Janssen, Merck, MSD Oncology, Novartis, Pfizer, Roche, Roche, and Sanofi; research funding from Ipsen and Sanofi; and travel and accommodation expenses from Bayer, Boehringer Ingelheim, Bristol-Myers Squibb, Eisai, Merck, MSD Oncology, Novartis, Pfizer, and Roche. Bernard Escudier: Honoraria Bristol-Myers Squibb; Ipsen; Oncorena; Pfizer. Consulting or Advisory Role – AVEO; Bristol-Myers Squibb; Ipsen; Oncorena; Pfizer. Research Funding - BMS France (Inst). Travel, accommodations, and expenses - Bristol-Myers Squibb; Ipsen; MSD. Laurence Albiges: consulting or advisory role – Amgen (Inst); Astellas Pharma (Inst); AstraZeneca (Inst); Bristol-Myers Squibb (Inst); Corvus Pharmaceuticals (Inst); Exelixis (Inst); Ipsen (Inst); Janssen (Inst); Merck (Inst); MSD (Inst); Novartis (Inst); Peloton therapeutics (Inst); Pfizer (Inst); Roche (Inst). Research Funding – Bristol-Myers Squibb (Inst). Travel, accommodations, and expenses – Bristol-Myers Squibb; MSD. Constance Thibault: consulting or advisory role – Astellas/Agensys; AstraZeneca; Bristol-Myers Squibb; Ipsen; Janssen; Merck; MSD; Pfizer; Sanofi. Travel, accommodations, and expenses - Astellas/Agensys; Janssen; Sanofi., (Copyright © 2023 Elsevier Ltd. All rights reserved.)