Answer: Halo Nevus
Also known as: Sutton’s nevus, or leukoderma acquisitum centrifugum.
A halo nevus is a compound or dermal nevus that develops a white border. It was first described by Richard L. Sutton in 1916.
The incidence in the population is estimated to be 1%. It can affect all races and both sexes. Congenital halo Nevomelanocytic nevus occurs rarely.
The depigmented halo is symmetrical and round or oval with a sharply demarcated border. Halo nevus shows a decrease or total absence of melanin and melanocytes. T-Lymphocytes at the site of depigmentation suggest that these cells participate in the halo phenomenon .