[X-ray computed tomography in the diagnosis of non-advanced stages of renal polycystosis in adults].

At early of non-advanced stages, the diagnosis of adult type polycystic disease may be very difficult using standard morphological techniques: IVU, echotomography. The CT scan is sometimes a decisive diagnostic feature when it shows diffuse invasion of parenchymal tissues by large numbers of cysts, certain measuring only millimetres. Its contribution is emphasised in five cases where the diagnosis was only suspected or envisaged by IVU and echotomography. In 4 of these cases the diagnosis of polycystic disease was confirmed by CT scan.