Metastasis of colorectal carcinoma in the testis: first sign of peritoneal disease.

Metastases of colorectal carcinoma (CRC) in the testis are very rare and indicate an advanced stage of disease. In this case report, we present a patient with adenocarcinoma in the sigmoid colon with metastasis in the right testis. Testicular metastasis of CRC is mostly diagnosed late because of their low incidence rate. Patients with CRC and testicular metastasis have a poor prognosis. In this case, the patient turned out to have peritoneal metastasis and one should be aware that testicular metastasis could be the first sign of widespread disease.