Abstract
The widely diffused opinion that metastases of renal carcinoma show a spontaneous regression after the removal of the primary tumor cannot be precisely confirmed by the literature. From the 18 cases mentioned in the literature concerning multiple metastases after removal of the primary tumor, only two have been histologically verified. The prognosis of metastatic renal cancer is, in spite of nephrectomy, to be seen as hopeless and is therefore in contrast to the cases with solitary metastases. An indication for nephrectomy in metastatic renal cancer exists only when there is an acute indication (uncontrollable hematuria, strong local pains, intermittent fever). In solitary metastases radical removal of the primary tumor and the metastases is absolutely essential. Seven cases of metastatic renal cancer will be demonstrated.