Dermatology clinic

A longstanding palmar lesion and nail dystrophy

Andrew Lee, Gayle Fischer
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Test your diagnostic skills in our regular dermatology quiz. What is the cause of this boy’s palmar lesion and dystrophic thumbnail?

Article Extract

Case presentation

An 8-year-old boy presents with a scaly erythematous lesion on his left palm that has been present for six months (Figure 1). His thumbnail of the same hand became dystrophic four months ago (Figure 2).