Introduction: This study aimed to evaluate the impact of chronological and biological age on perioperative complications and survival after radical nephroureterectomy (RNU). Elderly patients with upper-tract urothelial carcinoma might be overtreated by RNU. Methods: We retrospectively analyzed patients undergoing RNU. To evaluate the perioperative risk, patients were divided into four groups (<75; 75–79; 80–84; ≥85 years). The endpoints are perioperative complications and survival (overall survival [OS]). We calculated a risk score including chronological and biological age (Eastern cooperative oncology group performance status). Statistical analysis was performed by Kruskal-Wallis, Mann-Whitney U, χ2, log-rank, and Breslow tests. Results: 194 patients were included in the study. Median follow-up was 25.5 months. Elderly cohorts ≥2 presented a higher number of days in intensive care unit following RNU (p < 0.001). Complication rates increased from cohort 1–4 with rates of 48.8%; 55.2%; 92.0%; 85.7% (p < 0.001). Median survival was 115, 55, 28, and 20 months for cohorts 1, 2, 3, and 4, respectively. The combined risk score revealed a significant 5-year OS benefit for patients with score 0 (82.3%) compared to score 1 (46.0%) and score 2 (15.0%; p < 0.001). Discussion/Conclusion: We evaluated the impact of chronological and biological age on perioperative complications and survival after RNU. A combined risk score of chronological and biological age correlates with survival after RNU.

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