Yuki Nemoto1,2, Hiroki Ishihara3, Kazutaka Nakamura2,4, Hidekazu Tachibana5,6, Hironori Fukuda2, Kazuhiko Yoshida2, Hirohito Kobayashi5, Junpei Iizuka5, Hiroaki Shimmura4, Yasunobu Hashimoto1, Kazunari Tanabe2, Tsunenori Kondo5, Toshio Takagi2. 1. Department of Urology, Saiseikai Kawaguchi General Hospital, 5-11-5 Nishikawaguchi, Kawaguchi, Saitama, Japan. 2. Department of Urology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan. 3. Department of Urology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo, 116-8567, Japan. ishihara.hiroki@twmu.ac.jp. 4. Department of Urology, Tokiwakai Jyoban Hospital, 57 Kaminodai, Jyoban Kamiyunagayamachi, Iwaki, Fukushima, Japan. 5. Department of Urology, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo, 116-8567, Japan. 6. Department of Urology, Saiseikai Kurihashi Hospital, 714-6 Koemon, Kuki, Saitama, Japan.
Abstract
PURPOSE: To clarify the efficacy and safety profile of immune checkpoint inhibitors (ICIs) for elderly patients with metastatic renal cell carcinoma (mRCC). METHODS: We retrospectively evaluated 149 mRCC patients treated with nivolumab monotherapy as subsequent therapy (n = 89) and nivolumab plus ipilimumab as first-line therapy (n = 60) at 5 affiliated institutions. The patients were divided according to age: > 70 (elderly) vs. ≤ 70 years (young). Efficacy was analyzed by comparing progression-free survival (PFS), overall survival (OS), objective response rate (ORR), and disease control rate (DCR) between elderly and young patients. Safety was assessed by comparing the incidence rates of immune-related adverse events (irAEs). RESULTS: In the nivolumab monotherapy group, 34/89 patients (38%) were classified as elderly. There was no significant difference in PFS (p = 0.607), OS (p = 0.383), ORR (p = 0.0699), or DCR (p = 0.881) between elderly and young patients. In the nivolumab plus ipilimumab group, 20/60 patients (33%) were classified as elderly. There was no significant difference in PFS (p = 0.995), OS (p = 0.714), ORR (p = 0.763), or DCR (p = 1.000) between the two groups. The incidence rate of irAEs was not significantly different in the nivolumab (any grade: p = 0.121; grade ≥ 3: p = 0.542) or in the nivolumab plus ipilimumab (any grade: p = 0.666; grade ≥ 3: p = 0.576) group; a higher rate of gastrointestinal irAEs was observed in elderly than in young patients (any grade 15% vs. 3%). CONCLUSIONS: The efficacy and safety of nivolumab monotherapy and nivolumab plus ipilimumab were comparable between elderly and young patients. Thus, chronological age alone should not be a contraindication in the use of ICIs for mRCC.
PURPOSE: To clarify the efficacy and safety profile of immune checkpoint inhibitors (ICIs) for elderly patients with metastatic renal cell carcinoma (mRCC). METHODS: We retrospectively evaluated 149 mRCC patients treated with nivolumab monotherapy as subsequent therapy (n = 89) and nivolumab plus ipilimumab as first-line therapy (n = 60) at 5 affiliated institutions. The patients were divided according to age: > 70 (elderly) vs. ≤ 70 years (young). Efficacy was analyzed by comparing progression-free survival (PFS), overall survival (OS), objective response rate (ORR), and disease control rate (DCR) between elderly and young patients. Safety was assessed by comparing the incidence rates of immune-related adverse events (irAEs). RESULTS: In the nivolumab monotherapy group, 34/89 patients (38%) were classified as elderly. There was no significant difference in PFS (p = 0.607), OS (p = 0.383), ORR (p = 0.0699), or DCR (p = 0.881) between elderly and young patients. In the nivolumab plus ipilimumab group, 20/60 patients (33%) were classified as elderly. There was no significant difference in PFS (p = 0.995), OS (p = 0.714), ORR (p = 0.763), or DCR (p = 1.000) between the two groups. The incidence rate of irAEs was not significantly different in the nivolumab (any grade: p = 0.121; grade ≥ 3: p = 0.542) or in the nivolumab plus ipilimumab (any grade: p = 0.666; grade ≥ 3: p = 0.576) group; a higher rate of gastrointestinal irAEs was observed in elderly than in young patients (any grade 15% vs. 3%). CONCLUSIONS: The efficacy and safety of nivolumab monotherapy and nivolumab plus ipilimumab were comparable between elderly and young patients. Thus, chronological age alone should not be a contraindication in the use of ICIs for mRCC.
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