A rash on the upper extremities

Case #1

A 48-year-old man presents with a rash on the upper extremities that has been worsening for 5 months. On examination, the patient has thin erythematous plaques with overlying scale on the upper extremities and dorsal hands. The patient also has patches of hypopigmentation. On questioning, the patient states that the areas of hypopigmentation correspond to previous sites of the ...