[Radiological evolution of renal pelvis tumours (author's transl)].

The tumours of renal pelvis show a polymorphic radiological pattern, often rather difficult to interpret, sometimes even not evident owing to the presence of some other pathology. The most characteristic cases, and to be considered specimen, found in researches executed at different times, are represented by carcinomas, among which the ones showing the most elevated histological malignancy present a more rapid and infiltrative growth, as testified by repeated radiological tests.