(BMJ)—A man in his 60s had an itchy lesion at the site of a smallpox vaccination he received 40 years prior. The lesion developed over 6 months, with no response to topical steroids. Exam: L arm: red macule with thick scales. Bx confirmed the dx. What is it?
Tinea corporis
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Melanoma
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Eczema vaccinatum
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Squamous cell carcinoma
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Progressive vaccinia
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