Question 1:
A 70-year-old female presented with a 4.0 x 2.5 cm flesh-colored, firm dome shaped nodule on the left anterior shoulder, which had been slowly enlarging for a year. She endorsed full range of motion at the joint. A 4-mm punch biopsy was sampled and histopathologic findings are shown below.
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Figure 1
Figure 2.
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Which of the following is the best diagnosis?