Recent progress in ultrasonography of the bladder and prostate.

Gray scale transrectal ultrasonography has proved to be a valuable adjunct in the evaluation of patients with tumors of the prostate and bladder. Its application in patients with prostatic disease is in the detection of early asymptomatic tumors, in the accurate staging of local disease and in the following of patients after the institution of specific treatment. Although it is not being used for the detection of bladder tumors the procedure is a reliable means to evaluate the degree of tumor invasion so that proper therapy can be instituted.