34-Year-Old Man Presents With a Soft Tissue Induration in the Right Thigh

July 23, 2014

A 34-year-old man presents with a soft tissue induration in the right thigh. A biopsy of the mass is performed. What is your diagnosis?

A 34-year-old man presents with a soft tissue induration in the right thigh. A biopsy of the mass is performed and is shown below.

What is your diagnosis?