The American Society of Dermatopathology

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Interactive Case Study - June 2020

74-year-old male with a nodule on dorsal foot

Karah White, MD; B. Joel Tjarks, MD

Question 1:

A 74-year-old male presented with a 5.6 cm tan-pink, exophytic, verruciform nodule on his dorsal right foot.  An excision was performed (Figures 1-4).

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5. CEA immunohistochemical stain, 100X

Which of the following is the best diagnosis?