[Renal radioisotope study with 123I-hippuran in the monitoring of transplants].

Hippuran labelled with iodine 123 is now used for short- and long-term monitoring of renal transplants. Sixty-one explorations were performed in 24 patients, using this new radiopharmaceutical agent. Repeated explorations, facilitated by the lower doses of radiations as compared with 131I-hippuran, are particularly useful to diagnose thrombosis of the renal artery, early acute tubular lesions, acute and chronic rejection and impaired evacuation of the kidney. 123I-hippuran is the first-choice method of exploration of transplanted kidneys and can be followed, if required, by explorations more aggressive for the patient and the kidney.