The American Society of Dermatopathology

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Interactive Case Study - July 2015

Nodule on the scalp of a 76-year-old male

Anna Gray, MD; Eric Hossler, MD; George Lin, MD, PhD

Question 1:

A 76-year-old male presented with a lump on his right scalp for the past month that he recently traumatized on a shower bar.
Zoomable Virtual Slide

Figure 1. H&E 4x

Figure 2. H&E 20x

Figure 3. H&E 60x

Figure 4. CD31 4x

Figure 5. ERG 4x

What is the best diagnosis?