An 18-year-old Hispanic girl with no significant medical history presented with asymptomatic white spots on her lower back of several month’s duration. Empirical treatment with a topical antifungal agent for presumptive tinea versicolor had failed to improve the condition.
A 4-year-old boy who is new to your practice presents for a well-child visit. His parents report that he has had brownish patches on his torso and back since early infancy. The lesions have decreased in size and number as he has aged. The rash is intermittently pruritic, especially when anyone touches the individual lesions.