A man in his 60s presented to the dermatology clinic with a widespread, intermittently pruritic eruption. Examination showed coalescing annular, arcuate, and serpiginous red scaling plaques in a concentric pattern diffusely involving the chest, back, and abdomen with extension to proximal extremities (Figure, A and B). Punch biopsies from the chest (Figure, C and D) and back were obtained for histopathology and tissue culture. Treatment with topical corticosteroids under wet dressings was associated with partial improvement in the eruption and pruritus.
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Swanson LA, Peters MS, Comfere NI. Concentric Annular Truncal Eruption. JAMA Dermatol. 2020;156(10):1129–1130. doi:10.1001/jamadermatol.2020.2779
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