A healthy man in his 20s presented with a several-month history of asymptomatic, slightly erythematous cutaneous nodules, measuring 1.5 to 3.0 cm, over the calcanea (Figure, A). Physical examination revealed violaceous plaques, measuring 2 to 3 cm, on the extensor surface of the knees, bilaterally (Figure, B). Excisional biopsy specimens were obtained (Figure, C and D).
Scatena C, Grandi V, Beltrami G. Cutaneous Nodules and Erythematous Plaques on the Extremities. JAMA Dermatol. Published online November 16, 2016. doi:10.1001/jamadermatol.2016.3966