Diuretic Radionuclide Urography in the Diagnosis of Suspected Ureteral Obstruction following Renal Transplantation

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Abstract
The diuretic radionuclide urogram was shown to be an effective method to discriminate obstructive from nonobstructive hydronephrosis in nontransplanted renal units. This test was evaluated in 9 renal transplant patients with suspected partial ureteral obstruction. An obstructed pattern in 2 patients was confirmed and relieved by an operation. Nonobstructed patterns in 7 patients were verified by long-term clinical follow-up and subsequent ancillary testing. Accurate in all 9 cases, this investigation appears to provide a safe, noninvasive method to diagnose suspected posttransplantation ureteral obstruction.