The American Society of Dermatopathology

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Interactive Case Study - May 2017

Enlarging right thigh mass in a morbidly obese patient

Bethany Rohr, MD; George Lin, MD, PhD

Question 1:

A 61-year-old morbidly obese male presented with a four-year history of a slowly enlarging, asymptomatic, right thigh mass. Excision showed the following histopathology (Figures 1- 5).
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Figure 1. 20x

Figure 2. 20x
Figure 3. 20x

Figure 4. 200x
Figure 5. 400x

Which of the following is the best diagnosis?