The formation of a<unk>  surrounding a nevi is believed to occur when certain white blood cells called CD8+ T lymphocytes destroy the pigment-producing cells of the skin (melanocytes). The cause for the attack is unknown.
Halo nevus
Woolly hair nevus
Acral nevus
Spitz nevus
Eccrine nevus
Ink spot lentigo
Becker's nevus
Blue nevus