Recently, Gilliam et al1 described 2 young patients with a persistent, reddish-brown pretibial plaque. Based on the presence of numerous polyclonal plasma cells in the infiltration, the authors proposed a diagnosis of isolated cutaneous plasmacytosis.
Herein, we describe an 11-year-old girl with a 5-year history of a reddish-brown, uneven, irregular plaque, 4.0 × 2.5 cm in diameter, on the left anterior tibia. The lesion resembled clinically the entity described by Gilliam et al1 (Figure 1). It had been stable over the last 5 years, apart from a short-term, partial remission following intralesional steroid injections (performed before our observation).
Fried I, Wiesner T, Cerroni L. Pretibial Lymphoplasmacytic Plaque in Children. Arch Dermatol. 2010;146(1):95-96. doi:10.1001/archdermatol.2009.341