Dermatology practice

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Tune this setMiddle twist · 20 questionschange

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EverythingAMC examMedical schoolNursingBiomedical science

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AnyCommon2Middle twist5

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Dermatologymiddle twist

A 78-year-old man presents with a lesion on the sun-exposed forearm that has enlarged from a pinpoint mark to 18 mm over seven weeks. It is a firm, smooth, red-violet dome and is not painful or itchy. The surface is intact, with no scale, crust or central plug, and there is no preceding history of trauma. Which one of the following is the most likely diagnosis?