| Keratoacanthoma is a fairly dramatic lesion which most often occurs in sun exposed sites (such as the back of the hand) of a light skinned person. Typically, it appears suddenly and grows rapidly, over the course of weeks. Common clinical features include a central eschar or keratin plug and a raised peripheral border. The usual clinical course is that it grows rapidly, becomes necrotic, and spontaneously regresses over the course of two to four months, leaving a superficial scar. |
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| This rapidly growing crusting lesion was treated with excision and local flap cover. Path - keratoacanthoma. |
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| This resolved spontaneously. |
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| This crusting skin lesion migrated from the mid dorsum of the proximal phalanx to the metacarpal head area. It was removed with curettage, and healed. Path - keratoacanthoma. |
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| This keratoacanthoma was treated with curettage. |
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| Immediately before and after. The deep dermis is visible at the base of the wound. |
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| Late appearance. |
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