Spontaneous urinary extravasation during a diuretic radionuclide renal study. Report of two cases

Spontaneous urinary extravasation has been observed in excretory urography, but this complication has not been reported when a diuretic radionuclide renal study is used. This study reports two cases demonstrating this phenomenon. The lack of documentation of this occurrence may be related to the infrequency of this complication. Urinary extravasation is relatively innocuous although there are potential risks, as there are in excretory urography. The clinical usefulness of this study, however, clearly outweighs these potential risks.