A 46-year-old male presents to the office complaining of a pruritic skin rash that has been present for a few

weeks. He initially noted the rash on his chest, but it then spread to his back and arms. He notes that it does not seem to be on his legs. He recently came home from a trip to Florida, but denies fever, chills, new soaps or detergents, other travel, or known insect bites. He takes occasional ibuprofen for knee pain, but denies taking other medications or having other health problems. He has no known drug allergies. The physical examination reveals a male with a deep tan and notable scattered 1-1.5-centimeter, flat, circular, light-colored patches on his chest, back, and upper extremities. Post an explanation of the differential diagnosis for the patient in the case study that you selected. Describe the role the patient history and physical exam played in the diagnosis. Then, suggest potential treatment options based on your patient diagnosis.