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A black adolescent is brought by his mother to the dermatology clinic with a four-month history of white spots on his face. The 14-year-old patient denies any preceding blisters, infection, rashes, or topical therapies to the involved areas. He has been healthy throughout his life and has no history of any precipitating cause. Steroid creams prescribed by the family’s physician two months earlier seemed to make the condition worse. The teenager had been home from school for the past two days after a friend of his mother suggested he might have a methicillin-resistant Staphylococcus aureus infection.

What is the diagnosis?

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