Hypopigmented Lesion on Arm of 27-Year-Old Patient

January 17, 2018

A 27-year-old immigrant from Africa presents with a hypopigmented arm lesion, and a biopsy is obtained. What is your diagnosis?

A 27-year-old immigrant from Africa presents with a hypopigmented arm lesion, and a biopsy with special stains is obtained. This image represents an acid-fast histochemical stain.

Based on the image shown, what is your diagnosis?