Figure 3From: Concurrent development of testicular seminoma and choriocarcinoma of the superior mediastinum, presented as cervical mass: a case report and implications about pathogenesis of germ-cell tumoursA. Mediastinal choriocarcinoma: Diffuse sheets of cytotrophblastic and syncytiotrophoblastic cells. Hemorrhagic and necrotic locations are also seen. (medium power magnification) B. Tumor cells with diffuse positive cytoplasmic immunostaining for β-hCG.(High power magnification).Back to article page