Because of the altered anatomy, the presence of immunosuppression, the
possibility of graft rejection, and the serious implications of a pro
blem involving a solitary kidney, the transplanted kidney presents uni
que challenges in the diagnosis and treatment of urologic complication
s. Historically, the mortality rate in these patients has been as high
as 68%, and as many as 15% of the allografts have been lost. Today, e
ndourologic procedures are used for prompt diagnosis, temporization, a
nd even definitive management of many urologic complications, and many
patients and allografts are being saved. The authors review present t
echniques and suggest others that may be available in the future.