A 63-year-old woman visits urgent care with the chief complaint of an asymptomatic scabby growth on her scalp that developed 10 months prior and is gradually getting larger. The patient has no systemic symptoms and is otherwise well. She has a history of working as a welder in a metal fabrication plant for the past 35 years. On dermatological examination, an eroded and crusted plaque is seen on the frontal scalp. A punch biopsy reveals …
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