A 25-year-old man with no personal or family history of interest attended the outpatient clinic of the Complejo Hospitalario de Granada, Granada, Spain, in 2017 with multiple, non-pruritic, atrophic, mildly indurated, brownish, erythematous patches on his back of one year's duration [Figure 1]. He denied any regular medication use or having had any previous conditions. There was no history of trauma preceding the appearance of the skin lesions. Routine laboratory tests were within normal limits, including a complete blood cell count, urinalysis, thyroid profile, protein electrophoresis and general biochemistry, antinuclear/extractable nuclear antibody and rheumatoid factor tests. Immunoglobulin M and G tests for Borrelia burgdorferi were negative.