Intravenous urography in the follow-up of carcinoma of the bladder.

A urographic survey of 250 patients being followed for bladder cancer revealed 3 unsuspected ureteric tumours and 18 cases of ureteric obstruction. The tumours occurred in patients always affected by bladder recurrence and the obstructions were largely due to treatment of paraureteric bladder tumours by cystodiathermy or radiotherapy. Regular follow-up intravenous urography is therefore unnecessary except in patients with frequent recurrences, but we advocate radionuclide renography as an essential, inexpensive screening test to rule out ureteric obstruction following the treatment of paraureteric tumours.