Polycystography in the evaluation of carcinoma of the urinary bladder.

Polycystography is a safe, simple, useful, radiological procedure to assess the degree of infiltration of bladder tumors. It broadly classifies bladder tumors into two groups: infiltrating and noninfiltrating. This information is important to plan the treatment. In 96% of the cases, the radiological findings correlated well with other methods of assessing the degree of infiltration. The standard technic, modifications, advantages and disadvantages of this procedure are discussed.