Intrascrotal metastasis of renal cell carcinoma. Case reports and review of the literature.

In a series of 235 patients with testicular tumors 2 elderly patients (0.9%) had secondary testicular tumors: 1 from a renal cell carcinoma and 1 from an unclassified anaplastic neoplasm. The pathogenesis of intrascrotal metastases of renal carcinoma is demonstrated by angiography of the dilated spermatic vein. In a literature survey the incidence rate of secondary testicular tumors is found to range from 0.3 to 3.6%. 30 cases of intrascrotal secondaries of renal cell carcinoma have been identified in the literature.