Metastatic renal cell carcinoma to the bladder: case report and review of the literature.

We report the nineteenth documented case of a metastatic renal cell carcinoma implant to the bladder. Our patient, like others, presented with gross hematuria 6 years after treatment of the primary lesion. The literature is reviewed with reference to documented and unsupported cases. The hypotheses for the mechanism or mechanisms of spread and treatment regimens are discussed. The differential diagnosis of hematuria following nephrectomy for hypernephroma should include the possibility of metastatic renal cell carcinoma to the bladder.