Objective: To assess the impact of radical nephroureterectomy on postoperative renal function in patients with upper tract urothelial carcinoma (UTUC).
Methods: We retrospectively evaluated 645 patients with UTUC treated with radical nephroureterectomy between January 2000 and May 2022. The primary outcome was the rate of postoperative estimated glomerular filtration rate (eGFR) ≥60 mL/min/1.73 m . Secondary outcomes included the rate of eGFR decline, identification of factors related to eGFR decline, and the impact of comorbidities (diabetes or cardiovascular disease) on postoperative eGFR at 1 year.
Results: The median preoperative and postoperative eGFR levels were 55.6 and 43.3 mL/min/1.73 m , respectively. The rate of patients with preoperative and postoperative eGFR ≥60 mL/min/1.73 m was 40.9% and 9.0%, respectively. The median decline in eGFR after surgery was 25.1%. The presence of preoperative unilateral hydronephrosis and eGFR <60 mL/min/1.73 m was significantly associated with a low decline of postoperative eGFR and poor survival. The impact of the presence of comorbidities on postoperative eGFR at 1 year was significant (p < 0.001).
Conclusion: Impaired renal function is prevalent in patients with UTUC. The rate of patients with postoperative eGFR ≥60 mL/min/1.73 m was 9.0%. The presence of preoperative renal impairment was significantly related to a low decline in postoperative eGFR and poor survival. The presence of comorbidities had a significant effect on eGFR decline 1 year after radical nephroureterectomy.
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