17-Year-Old With Recurring Rash

These discolored, scaly lesions on this young man’s trunk have recurred for the past 2 summers. He reports that the rash becomes “irritated and itchy” when he is in the sun.

These discolored, scaly lesions on this young man’s trunk have recurred for the past 2 summers. He reports that the rash becomes “irritated and itchy” when he is in the sun. None of his close contacts is affected.

Your suspicion?