The patients is a 25-year-old woman who presents with 1 month of smooth, red-brown plaques on her elbows and the tops of her feet which are pruritic. The lesions are round with a slightly darker ring on the outside, with no scaling or significant surface change to the skin. She has no systemic symptoms.
View the image and consider what your diagnosis and next steps would be. Resolution of the case is described on the next page.