Jiang-Wei Cheng, MD; Bo-Wen Zheng, MD; Jiu-Hong Li, MD, PhD
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JAMA Dermatol. Published online October 16, 2024. doi:10.1001/jamadermatol.2024.4172
This case report describes a woman in her 70s with an erythematous plaque with superficial erosion, focal white scale, and surrounding hyperpigmentation located circumferentially around the anus and extending anteriorly to involve the perineum.