Halo nevus
Other names	Leukoderma acquisitum centrifugum of sutton
Specialty	Dermatology

Halo nevus is amole that is surrounded by apale ring or 'halo'.^[1] It is generally noticed in the summer, when surrounding skin tans, and usually occurs on the chest, but can be anywhere.^[1] There may be one or, more typically, several.^[2] Onset is usually in teenagers and young adults.^[1][3] It typically follows a pattern of appearing at first as a dark mole surrounded by a halo before the nevus fades and disappears.^[1] A single halo-nevus-like lesion appearing in an older adult may be a melanoma.^[1]

It occurs in around 1% of the general population, and males and females are affected equally.^[1]

Halo nevi are also known as Sutton's nevi, or leukoderma acquisitum centrifugum.^[2] Halo nevi are named such because they are a mole (nevus) that is surrounded by an area of depigmentation that resembles a halo.

Halo nevi are associated withvitiligo. Sometimes the pale (hypopigmented) areas will spontaneously regress, and pigment returns.

The formation of a halo surrounding a nevi is believed to occur when certainwhite blood cells calledCD8+ T lymphocytes destroy the pigment-producing cells of the skin (melanocytes).^[4] The cause for the attack is unknown.^[5]

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As halo nevi are only of cosmetic significance, no treatment is required,^[6] and patients will beasymptomatic. Although halo nevi are harmless, it is important to monitor the lesion on a regular basis.^[7] Watch out for any changes in appearance of existing or new halo nevi. If there is any change in appearance or is associated with pain, itch, and infection, a doctor should be consulted immediately to exclude the possibility of melanoma.

Halo nevi are estimated to be present in approximately 1% of the general population and are found to be more prevalent in people withvitiligo,malignant melanoma,^[5] orTurner syndrome.^[8] All races and sexes are equally susceptible to this disease, although a familial tendency has been reported. The average age of onset is in a person's teenage years.

• Nevus
• List of cutaneous conditions

• Melanocytic nevi and neoplasms

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