A solitary asymptomatic patch on the palm.

Abstract

A woman in her mid 60s presented for an asymptomatic pink depressed patch on her left thenar eminence. It had been present for 10 years and gradually enlarged. She denied a history of trauma or other local exposure that could have contributed to the formation of the lesion. Her medical history included arthritis, hypertension, hyperlipidemia, and mallet finger of the right hand. She denied any history of skin cancer. Physical examination was notable for a 3 × 2-cm well-demarcated mildly erythematous patch on her left thenar eminence with a raised scaly border (Fig. 1). A biopsy specimen of the peripheral border was obtained for histopathologic analysis (Fig. 2).