Figure 1. Nephrostogram of the transplant kidney demonstrates a large filling defect (arrow) in the renal pelvis extending into the proximal ureter causing partial obstruction.
Figure 2. A large sloughed papilla in the renal pelvis extending into the proximal ureter has resulted in complete obstruction to the kidney. A large papillary ulcer (arrow), which is the donor site for the sloughed papilla is demonstrated.