Figure 1.

A 59-year-old male with a history of recurrent ureteral obstruction and hydronephrosis, for which he had undergone ureteric reconstruction and transplantation of the native ureter into the transplant kidney. This nephrostogram performed following nephrostomy for hydronephrosis shows opacification of the transplanted ureter, which is long and tortuous, and therefore prone to stricturing and intermittent kinking (see Renal transplant obstruction section for further details).