PMC9946049_01
Pigmented annular atrophic lichen planus (AALP). (A,B) Clinical pictures of eruptive AALP. (C) Localized AALP on the limbs and the axilla. (D-F) Dermoscopy images showing grayish-white annular and reticular Wickham striae (WS) at the periphery of the lesions, and clustered brown-gray dots on a light brown background in the center (black-hole pattern). (G) Active lesions: dotted vessels around annular WS on a background of erythema. (H,I) Late inactive lesions: heterogeneous granular and arciform pigmented dots and globules on and around WS (I), white starburst scar-like areas (H).
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In late lesions, we observed heterogeneous granular pigmented dots on and around WS, white starburst scar-like areas were noticed in some spots (Figure 1).
PMC9946049_02
Pigmented annular atrophic lichen planus. Histopathology (H&E). (A) Magnification x 50) at the periphery of the lesion, band-like inflammatory lichenoid infiltrate intimately linked to the dermo-epidermal interface. (B) (x100). Hair damage by the inflammatory infiltrate. (C) (x400) and (D) (x 200) At the center of the lesion, lichenoid infiltrate with basal apoptotic bodies and melanophages in the superficial dermis.
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Melanophages were noticed in the papillary dermis (Figure 2).