Patient Presents With Pigmented Lesion

August 2, 2016
Cesar A. Moran, MD

A 38-year-old man presents with a pigmented lesion on his back, and a biopsy is performed. What is your diagnosis?

A 38-year-old man presents with a pigmented lesion on his back, and a biopsy is performed.

Based on the image shown, what is your diagnosis?