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Primary germinal tumors of the mediastinum are extremely rare. Most germ cell tumors in that location occur as metastasis from testis. A case report with immunocytochemical studies is described. Histologically, the tumor had features of choriocarcinoma and with immunoperoxidase technique stained positively for Beta human chorionic gonadotropin (BHCG). The patient is alive and asymptomatic 2 years post surgery and chemotherapy.
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