Acute-onset Acne: A Mysterious Case

An acute outbreak on a formerly clear-complected young girl is suspicious for some notable features that are missing. Your Dx?

"Do sodas, chocolate, and fried foods really play a role in causing acne," asks the new family practice resident over a lunch of sandwiches, chips, and soft drinks.Leaving the response to the old wives' tale hanging, Dr Schneider and his new resident proceed to meet the first patient of the afternoon -- an 11-year-old girl complaining of facial acne that she says came "out of nowhere."Close examination and a thorough history solve the mystery behind the acute breakout. The young girl's mother will have to take things from there. Your Dx?