A 30-yr-old man presented with a mediastinal germ cell tumor that combined the histologic pattern of seminoma with the immunohistochemical profile of embryonal carcinoma (beta-HCG+/PLAP-).

Four patients with mediastinal germ cell tumor containing sarcoma also had hematological malignancies, including a focus of nonHodgkin's lymphoma in the mediastinal primary tumor (1) and ...