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(a) Solar lentigo with brown structureless areas, (b) lentigo maligna with rhomboids (arrowhead) and annular-granular structures (arrow), (c) pigmented actinic keratosis with rosettes (arrow), (d) pigmented actinic keratosis with hyperpigmented follicular openings (arrow) and obliterated follicular opening (arrowhead). [Copyright: ©2018 Costa-Silva et al.
