Secondary tumors of testis: two rare cases and review of the literature.

Secondary testicular tumor is a rare event. Approximately 200 cases have been documented in the international literature since 1935. The most common primary tumor sites have been the prostate, lung and kidney with other sites being reported less frequently. Our literature review discovered only 7 cases originating from primary tumors of the stomach and 14 cases from primary tumors of the colon. We want to add 2 more cases and discuss the possible mechanism of this neoplastic dissemination.