Overview
Hyperpigmented concentric rings over the tibia are secondary to prior inflammation. Residual hemosiderin from broken down red blood cells in macrophages, left behind after inlammation pigments the skin.
Review Date 6/19/2021
Updated by: Ramin Fathi, MD, FAAD, Director, Phoenix Surgical Dermatology Group, Phoenix, AZ. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.