Percutaneous nephrostomy in the management of malignant ureteral obstruction secondary to bladder cancer.

BACKGROUND AND PURPOSE: Malignant ureteral obstruction (MUO) is a common late manifestation of metastatic bladder cancer. We investigated the effectiveness of percutaneous nephrostomy (PN) in our patients with MUO associated with bladder cancer as judged by the serum creatinine concentration in the presence of unilateral or bilateral obstruction and in relation to the treatment results. PATIENTS AND METHODS: The records of 23 consecutive patients with a mean age of 55 years (21 men, 2 women) who underwent PN were retrospectively reviewed. Eleven had unilateral obstruction. We assessed normalization of creatinine concentration, survival, and quality of life after PN in patients with either unilateral or bilateral obstruction. RESULTS: The mean serum creatinine concentration before PN was 6 mg/dL (range 2.1-24.6 mg/dL). Percutaneous nephrostomy provided improvement to normal renal function in 19 patients (83%). The mean survival of patients after PN was 4.9 months (range 1-14 months). No independent factor playing a significant prognostic role was determined. The overall complication rate was 30% (7/23), namely kinking or dislodgment of nephrostomy tubes. After PN, all patients were able to undergo treatment for bladder cancer. CONCLUSIONS: Percutaneous nephrostomy, with a low morbidity rate, is a safe urinary diversion technique in bladder cancer-induced MUO. It relieves at least the devastating effects of uremia and allows appropriate treatment for the malignancy.