Keratoacanthoma, dermoscopy

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Keratoacanthoma, dermoscopy. A keratoacanthoma lesion consists of a localised proliferation of squamous cells that forms a cratered nodule. The nodule grows over several weeks before gradually disappearing. However, the unsightly nodule is often surgically removed as it is clinically indistinguishable from a squamous cell carcinoma (SCC). The cause of keratoacanthoma is unknown, although exposure to sunlight appears to be a factor.

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Photo credit: © RICHARD USATINE MD / SCIENCE PHOTO LIBRARY / Alamy / Afripics
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