[Diagnosis and therapy of malignant parenchymal kidney tumors]

We think that the present paper insistently demonstrates the fact which is acknowledged by all but followed only by few how important is a unitary classification of the renal tumours in order to perform scientifically proved comparisons and valuations in all branches of the treatment of renal tumours including the results of the therapy. On the basis of the classification of our patients according to the TNM-system we could prove that the best results in the operative removal of the kidney with following irradiation were achieved in the categories T1 and T2, particularly when there were not yet present any metastases distant from the primary tumour.