[Computer tomography in cancer of the renal pelvis]

The value of computer tomography in the investigation of carcinomas of the renal pelvis was analysed in 22 patients. In 88% of cases it was possible to differentiate tumours confined to stages I and II from tumours in the advanced stages III and IV. Computer tomographic signs of stages III and IV were demonstration of infiltration into the surrounding tissues and into the renal parenchyma as well as the presence of regional lymph node metastases. Computer tomography should follow urography wherever there is a suspicion of a pelvic carcinoma in order to define the tumour more precisely.