Derm Dx: Violaceous annular plaques on the trunk

by Kristy Fleming, MD

A 31-year-old Latino man with diabetes presents to the dermatology clinic with pruritic plaques on the base of the neck and bilateral lateral trunk. The plaques appeared approximately three months earlier and have since increased in size and number.

The lesions had no scale and were slightly indurated to palpation. The patient reported no new medications or ...