Figure 1.

Patient in prone position with ileal conduit has a right retrograde nephroureteral stent (RNUS) and a left percutaneous internal/external nephroureteral (PCNU) that is to be exchanged for a RNUS. (A) Shows right RNUS and left PCNU. (B) The patient is in lateral oblique position, the left PCNU has been removed over a wire and contrast injection shows left hydronephrosis and a stricture (arrows) in the lower end of the left ureter. (C) Final image shows the final RNUS with a loop formed within the renal pelvis (white arrow).