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A 71-year-old white man with Fitzpatrick skin phototype III presented with a 1-year history of asymptomatic pigmented macules on his face. His medical history was unremarkable. Physical examination revealed violaceous-brown coalescing reticulated macules, which were more prominent on both mandibular regions and very faint over the cheeks, with slight lamellar peeling and without infiltration (Fig. 1a). There were no changes in other skin areas, or in the hair, nails or oral mucosa. Routine laboratory tests were within normal ranges, and antinuclear antibody (ANA) test was negative. Histopathological findingsHistological examination of a punch biopsy specimen showed a thin epidermis, interface dermatitis, basal vacuolar degeneration, a moderately dense, perivascular and mildly interstitial lymphocytic infiltrate, moderate pigmentary incontinence, colloid body formation and prominent solar elastosis (Fig. 1b).

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