Question 1:
Shave biopsy of a large, indurated plaque on the right upper extremity of a 60-year-old man.
Click this image to view the virtual slide
Figure 1 (H&E, 40x)
Figure 2 (H&E, 100x)
Figure 3 (H&E, 200x)
Figure 4 (H&E, 600x)
Figure 5 (H&E, 1000x)
Figure 6 (GMS, 600x)
Figure 7 (PAS, 600x)
Which of the following is the best diagnosis?