An otherwise healthy 2-year-old girl is referred to our clinic for assessment of a lesion on the right lower leg. After a trip to Mexico 15 months prior, the parents first noticed what they describe as a “tan” on the posterior aspect of her right lower leg, followed by a scaly round plaque that would come and go. There has been no pain or pruritus. She was prescribed mometasone furoate ointment, which had some benefit. She later developed red-to-purple nodules in the same area. The patient was seen by multiple providers and was prescribed a combined fusidic acid (antibiotic) and hydrocortisone 1% ointment, a 1-week course of oral cephalexin, and betamethasone valerate 0.05% ointment; each without any improvement.
The patient lives in a house in an urban area. She has not had contact with any animals. There are no noted exposures to insect bites or changes in clothing or detergents....
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