The American Society of Dermatopathology

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Interactive Case Study - November 2013

Asymptomatic nodule on the finger

Laura-Catherine Christensen, BS; Jessica A. Kozel, MD

Question 1:

A 48-year-old male presented with a translucent, brown asymptomatic nodule on the volar aspect of his distal index finger.   The lesion had been present for about one year.   A biopsy was performed (Figures 1-3).

Figure 1:  H&E, 40x.

Figure 2:  H&E, 100x.

Figure 3:  H&E, 400x.

Which of the following is the best diagnosis?