Bilateral Testicular Tumors of Germ Cell Origin

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Abstract
Four cases of primary testicular tumor of germ cell origin are reported. Three cases were bilateral, while the remaining case involved a unilateral tumor in a non-twin brother of 1 patient with bilateral tumors. Because of the increased likelihood of a second primary tumor developing in a patient who has had a malignant germinal cell tumor and because the changes may be subtle, localized to the testis and occur after a tumor-free interval of many years, careful examination of the contralateral testis and long-term followup are indicated even when systemic chemotherapy for malignancy has been used. This is the seventh time familial occurrence of testis tumors in non-twin brothers has been reported but the first time that one of the brothers had bilateral tumors.