A case of testicular germ cell carcinoma identified five years after lung metastasis resection

A 33 year-old man was referred to our center with swelling of the left scrotum. He underwent resection of the left testis,and pathological diagnosis indicated a germ cell tumor of that testis. His past history included lung cancer resection 5 yearsbefore the testicular surgery. Precise pathological reevaluation of the lung cancer using immunohistochemical methodsindicated that the tumor originally diagnosed as lung cancer was a metastasis of the germ cell tumor of the left testis.