A randomized controlled trial tested the efficacy and safety of a silicone-covered metallic stent compared with a conventional polymeric double-J stent in patients with malignant ureteral obstruction.

Nephrostomy tubes can be uncomfortable and potentially carry a higher risk of infection than do internal ureteral stents as a result of their percutaneous placement ... of a double-J stent ...

and they cannot have or do not want a double‑J stent, or when repeat procedures are particularly high risk. Data should be collected prospectively on ureteric stent procedures, including details of ...