Question 1:
A healthy 21-month-old male infant presented with a tan-brown nodular lesion on his left anterior chest wall and a hairless, brown patch on his scalp. A surgical excision was performed.
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Figure 1: H&E 20X
Figure 2: H&E 40X
Figure 3: H&E 200X
Figure 4: H&E 400X
Which of the following is the best diagnosis?