Question 1:
A 53-year-old male with a history of alcohol abuse presented with multiple blisters and large erosions on his hands and forearms, which had been present for almost 2 years (Figure 1). He works outside and denies excoriating the lesions. A biopsy was performed (Figures 2-5).
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Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Which of the following is the best diagnosis?