Synchronous Leydig Cell Tumor and Seminoma in the Ipsilateral Testis

Figure 2

Immunohistochemical staining of the seminoma and Leydig cell tumor. (a) The seminoma cells (top) stained positively for (a) CD117 and (b) PLAP, while the Leydig cell tumor (bottom) was negative for both markers. (c) Inhibin immunostain is positive in the Leydig cell tumor (bottom) and negative in the seminoma (top). (d) Both the seminoma (top) and Leydig cell tumor (bottom) are negative for cytokeratin (×4000 each).

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