[Gynecomastia following cytotoxic treatment of testicular cancer].

A case of post-chemotherapy gynecomastia is reported in a 40 years old male patient with a tumor of seminomatous germinal cells with no evidence of tumoral reappearance or augmentation of the chorionic gonadotropin hormone. The existence of primary hypogonadism was tested. A differential diagnosis was performed and possible physiopathological mechanisms of the gynecomastia were analyzed in a patient previously treated for testicular cancer.