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What Is the Cause of These Annular Lesions?

What Is the Cause of These Annular Lesions?

Figure 1

A 36-year-old man with a history of chronic back pain presented for evaluation of an atypical nevus on the right leg. A complete skin examination was performed. A dark brown 2- x 2-mm macule was found on his right thigh. Further skin examination revealed multiple 3-cm, annular, hyperpigmented patches scattered across the upper and mid back (Figure 1). 

What Is The Diagnosis?
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