[On the problem of angiographic differential diagnosis between hypernephroma, angiomyolipoma and carcinoma of the renal pelvis (author's transl)].

Pretherapeutic type diagnosis of a renal tumour will be decisive for further clinical measures and for the fate of the patient. The incidence and relative significance of the angiographic signs of three types of tumours are critically reviewed on the occasion of a carcinoma of the renal pelvis which had at first been wrongly diagnosed via angiography as a hypernephroma and then as an angiomyolipoma. For the first time, the article goes into the details of differential diagnosis between angiomyolipoma and a tumour of the renal pelvis growing into the renal parenchyma. It is concluded that the angiographic signs described in literature will mostly occur with the other two types of tumours as well, besides being non-obligatory. For the purpose of enabling angiographic tendency diagnosis despite this difficulty, the article suggests to employ sequential paired differentiation of the type which would be a prerequisite for any future computer-supported diagnostic method.