Bhagwan Das Bang, MD

The sharply demarcated, smooth red plaques on this 3-year-old's tongue had been present for several months.

A 13-year-old girl noticed that the skin around a "mole" on her abdomen had gradually changed color. This patient was told that she had a halo nevus--a pigmented (nevocellular) nevus surrounded by a tight ring of depigmentation--which is benign and usually regresses spontaneously over time.