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?