Male Pelvic Squamous Cell Carcinoma of Unknown Primary Origin

Figure 2

Hematoxylin and eosin (H&E) stain at 100x, 200x, and 400x power, respectively, demonstrates metastatic squamous cell carcinoma. At 400x power (c), intracellular bridges (yellow arrows) and eosinophilic, intracytoplasmic keratin (black arrow) are seen, indicating squamous differentiation.

(a)

(b)

(c)