[Wilms' tumor and neuroblastoma--diagnosis and differential diagnosis].

The radiological results of the urographic findings of 39 children with Wilms' tumours and 20 children with neuroblastomas were analysed respectively. In most cases an exact diagnosis could be achieved by means of the intravenous pyelography with differentiation between the two malignant tumours. Only in a few cases the investigation had to be supplemented with a retrograde pyelography or an angiography. Of great value was the detection of calcifications, the evaluation of the outline and size of the kidneys, decreased function of the affected kidney and filling defects of the calyceal groups and displacement of the renal pelvis.