Case Report

Metastatic Seminoma with Positive Staining of Cytokeratin and MOC31: A Diagnostic Pitfall

Figure 2

(a) Low power view infiltrative tumor cells mixed with lymphocytes. (b) High power view showing the infiltrating tumor cells with a sheet-like growth pattern with medium to large size, pale to clear cytoplasm, and polyclonal nuclei. (c) The tumor cells were positive for pan-cytokeratin. (d) The tumor cells are positive for MOC31. (e) The tumor cells were diffusely and strongly positive for Oct-3/4. (f) The tumor cells were diffusely and strongly positive for CD117.
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