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EasyDermatologyActinic Keratosismrcgp aktukmlapane

A 70-year-old man presents with a skin lesion on his sun-exposed forearm that has been present for months. It is a scaly, erythematous papule, approximately 8mm in diameter, slightly tender on palpation, and feels rough like sandpaper. There is some surrounding sun damage. What is the most likely diagnosis?

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