The American Society of Dermatopathology

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Interactive Case Study - December 2017

An Asymptomatic Mass on the Wrist of a 44-year-old Female

Allen G. Strickler, MD, PhD; George Lin, MD, PhD

Question 1:

A 44-year-old female presented with an enlarging but otherwise asymptomatic 2.5 cm mass on her right dorsal wrist that had been present for approximately one year. Attempted aspiration of the mass failed to yield fluid.
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Figure 1. 4x

Figure 2. 20x

Figure 3.60x

What is the best diagnosis?