[Classification of bladder tumours by sonography (author's transl)].

Sonography was used for classifying bladder tumours by the T.N.M. system (UICC 1978). Methods and techniques are described. Since treatment depends largely on the stage of the tumour, classification is of great significance. With an accuracy of 95%, sonography has proved to be invaluable, non-invasive and an easy method. Examples are given to show its use in control after treatment.