[Synchronous bladder metastasis of a clear-cell adenocarcinoma of the kidney].

Urinary bladder synchronous metastases from renal cell carcinoma are rare, three cases were reported in the literature and we present the fourth. In these four published cases, the bladder metastases followed a left kidney tumor and in three, a brain metastases was also found. A possible retrograde metastatic dissemination through the left genital and vertebral veins has to be taken in consideration. The short survival after the extirpation of the tumor and the bladder metastases implies a less aggressive approach in the presence of a bladder metastases.