A man in his 70s presented with a 4.0-cm linear plaque with an 8.0-mm erythematous nodule on one end on his right upper abdomen (Figure, A). The lesion appeared 2 months prior and had been mildly itchy. The patient lived in a farm community that used well water for drinking. He denied wading in local water sources and had not traveled abroad recently. The patient denied systemic symptoms, and further physical examination results were unremarkable. Recent laboratory blood work was notable for peripheral eosinophilia. A punch biopsy was performed (Figure, B).
Feigenbaum L, Motaparthi K, Fradin M. A Serpiginous Plaque on the Trunk. JAMA Dermatol. 2016;152(7):831-832. doi:10.1001/jamadermatol.2016.0348