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Off-Center Fold
September 2003

An Annular Lesion on the Back—Quiz Case

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Copyright 2003 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.2003

Arch Dermatol. 2003;139(9):1209-1214. doi:10.1001/archderm.139.9.1209-a

A previously well 52-year-old man presented with a 1-month history of a solitary, intermittently mildly pruritic lesion on his back that would recurrently crust. Physical examination revealed a sharply demarcated, adherent, scaly annular lesion surrounding an evenly pigmented lesion with regular borders (Figure 1). An incisional biopsy was performed (Figure 2 and Figure 3).