Question 1:
Clinical History: A 70-year-old man presents with a three-month history of a scaly erythematous eruption most prominently involving his trunk and extremities. A biopsy from his upper arm (Figures 1-3) and back (Figures 4-5) show the following histopathology.
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Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
What is the best diagnosis?