Non-small cell lung cancer with testicular metastasis: a case report.

A 51-year-old man was diagnosed to have non-small cell lung cancer, right middle lobe, with multiple bony metastasis. Systemic chemotherapy with the regimens of cisplatin plus etoposide was administered. A 2 x 2.5 cm firm nodule in the right testis was incidentally found two weeks after the first course of chemotherapy. Transinguinal right radical orchiectomy was performed. Pathologic examination revealed a picture similar to his lung cancer. Secondary carcinoma of the testis is extremely rare. The relevant literature about its incidence, clinical manifestations, sources of primary tumor and routes of metastasis are reviewed.