Halonevus
| Classification according to ICD-10 | |
|---|---|
| D22.- | Halonevus |
| ICD-10 online (WHO version 2019) | |
A halon nevus is a nevus cell nevus that is surrounded by a white, pigment-free ring (halo). (Synonym: Sutton nevus ) It is a certain subtype of benign, limited malformations of the skin ( nevi ), colloquially known as " birthmarks ".
Epidemiology
This type of pigmented nevus occurs mainly in childhood through to young adulthood and can sometimes be a sign of vitiligo ("white spot disease") (approx. 20% of vitiligo patients have halo nevi).
clinic
First, a reddish halo forms around an already existing nevus cell , which fades and becomes white over time. The central nevus can later recede and lose its pigment. Years or months after that, all of the skin changes may return to normal skin color.
It is believed that autoimmunological processes are involved in the destruction of melanin and melanocytes .
forecast
As a rule, halo nevi go away on their own after a certain time and are completely harmless.
Occasionally, however, a depigmented ring can form around a malignant melanoma , which can lead to confusion between a halonevus and this dangerous type of skin cancer.
Web links
literature
- Thomas B. Fitzpatrick, Klaus Wolff (ed.): Atlas and synopsis of clinical dermatology: common and threatening diseases . 3. Edition. McGraw-Hill, New York; Frankfurt a. M., 1998, ISBN 0-07-709988-5 .
- Ernst G. Jung, Ingrid Moll (Ed.): Dermatology . 5th edition. Thieme, Stuttgart, 2003, ISBN 3-13-126685-6 .
