REPORT OF A CASE
A 38-year-old Filipino man presented for evaluation of a slowly growing papule on his left lower leg. The asymptomatic papule had been present for 1 year.Physical examination was remarkable for a 5×5-mm reddish-pink, firm papule over the medial aspect of the left lower leg (Figure 1). The papule had a flat, smooth surface centrally and a collarette of fine scale at the periphery. The skin adjacent to the papule had brown hyperpigmentation. The cutaneous examination was also remarkable for a Becker nevus over the right upper arm.A punch excision from the left lower leg is shown in Figures 2 through 4.What is your diagnosis?
Hematoxylin-eosin—stained sections revealed a sharply demarcated, acanthotic epidermis composed of large keratinocytes that stained lighter than the adjacent epidermis. Parakeratosis and an absent granular layer were
Breer WA. Asymptomatic Papule on the Lower Leg. Arch Dermatol. 1993;129(11):1509-1510. doi:10.1001/archderm.1993.01680320143020