Figure 3.

Patient with ileal conduit and bilateral retrograde nephroureteral stent (RNUS) presenting for routine stent change. (A) Images after placement of the new stent reveal that the loop is retroperitoneal, most likely due to perforation by the catheter during catheter exchange. (B) The stent was removed over a wire and used in combination with an MPA catheter to reaccess the ureter. (C) Final image shows the new catheter with the loop within the pelvicaliceal system. There were no adverse clinical consequences after this exchange.