Pigmented actinic keratosis

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Main PageNONMELANOCYTIC LESIONSPigmented actinic keratosis
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 Author(s): Lauren Fried
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Below are dermoscopic features commonly associated with the diagnosis “Pigmented actinic keratosis”.[1] The example images have been approved by a panel of experts as representative of each given feature.

For a more in-depth discussion of associated features, please see the Dermoscopedia page for “Pigmented actinic keratosis”.

Gray dots

Annular-granular pattern (gray dots around follicular openings)

Rosette sign

White four-leaf clover-shaped structure; can only be seen on polarized dermoscopy.[1]

Surface scale

  1. Fried LJ, Tan A, Berry EG, et al. Dermoscopy Proficiency Expectations for US Dermatology Resident Physicians: Results of a Modified Delphi Survey of Pigmented Lesion Experts. JAMA Dermatol. Published online January 06, 2021. doi:10.1001/jamadermatol.2020.5213
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