Uretero-Ureterostomy Combined With Unilateral Nephrostomy as a Method of Urinary Diversion Following Radical Cystectomy.

Introduction Uretero-ureterostomy combined with unilateral nephrostomy is a rarely performed urinary diversion following radical cystectomy for muscle-invasive bladder cancer. The aim of this study is to assess the efficacy and safety of the procedure. Materials and methods Patients with muscle-invasive bladder cancer and poor performance status were enrolled in this retrospective, observational, single-centre study, carried out between December 2018 and November 2020. The patient's renal function was regularly assessed with serum creatinine and estimated glomerular filtration rate (eGFR). Evaluation of peri- and postoperative complications was performed based on clinical, laboratory, endoscopic, ultrasound and other radiological studies findings. The patient's status was assessed for 12 months. Results Thirty-six patients with a mean age of 77.4±8.6 years were enrolled in the study. 86.11% of patients had an American Society of Anesthesiologists Score ≥3 and 91.66% had an age-adjusted Charlson comorbidity index of ≥6. Slight deterioration of renal function, although not statistically significant, was observed. 36.11% of the patients developed permanent unilateral pelvic dilatation. Acute pyelonephritis, urosepsis, pyonephrosis and anastomotic leak were observed in 22.22%, 8.33%, 5.55% and 5.55% of patients, respectively; all were treated either conservatively and/or with minimally invasive procedures (nephrostomy, JJ-stent insertion) without any need for open surgical revision. Conclusions Ureteroureterostomy combined with unilateral nephrostomy is a safe and effective method of urinary diversion following radical cystectomy for muscle-invasive bladder cancer with easily manageable complications.