Derm Dx: Asymptomatic hyper- and hypopigmented macules and patches

A 27-year-old Hispanic male presents with brown patches on his trunk and abdomen that have been present for three years.

Although the patches are present all year long, they are significantly more noticeable in the summer. The patient denies pain or itch, but is quite embarrassed by the appearance. Physical exam is significant for reddish-brown, well-demarcated patches on the central ...