Spontaneous urinary extravasation during intravenous pyelography.

A case is presented of a patient who developed extravasation of radiographic contrast material while undergoing an intravenous pyelogram for evaluation of ureteral obstruction. Such extravasation is uncommon and appears to occur most commonly at the renal calyceal fornix. Complications of extravasation are rare, and patients may be expected to do well with conservative management.