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Course: Erythrasma

CME Credits: 1.00

Released: 2024-01-17

A woman in her 60s with a history of type 2 diabetes presented for evaluation of a persistent rash involving the bilateral axillae, inframammary skin, and inguinal folds that first presented approximately 1 year prior. She endorsed mild pruritus without pain and reported some improvement with use of econazole nitrate, 1%, cream. She denied additional skin lesions and did not recall any preceding triggers. Physical examination was notable for well-demarcated brown plaques with overlying fine scale in the bilateral axillae, inframammary folds, and inguinal folds without crusting or drainage (Figure 1). Wood lamp examination of the axilla visualized a widespread coral-red fluorescence in the area of the brown plaque (Figure 2), supporting the diagnosis of erythrasma. The patient was treated with clindamycin, 1%, lotion and mupirocin, 2%, ointment with resolution after 1 month, although postinflammatory pigmentary changes persisted for several weeks. She was also recommended topical benzoyl peroxide, but opted to not use it.


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