Naevus fuscocaeruleus
| Classification according to ICD-10 | |
|---|---|
| D22.301 | Nevus Ota |
| D22.504 | Ito nevus |
| ICD-10 online (WHO version 2019) | |
Naevus fuscocaeruleus is the umbrella term for two specific forms of benign, dark blue pigmented, circumscribed malformations of the skin ( dermal pigment nevi ) that differ from one another only in their location. The Ota nevus is located on the face, while the Ito nevus occurs primarily on the shoulder. Colloquially, such skin changes are referred to as " birthmarks ".
Epidemiology and history
Frequent occurrence in Asians, occasionally also in dark-skinned people, but rarely in whites. The nevus Ota ( Japanese 太 田 母 斑 Ōta bohan ) was first described in 1939 by the Japanese dermatologist Masao Ota (1885–1945). It is almost five times more common in women than in men. The nevus Ito was first published by Minor Ito in 1954.
clinic
This type of pigment disorder manifests itself as dark bluish to brownish hyperpigmentation , which is blurred and piebald. The unusual, bluish hue is caused by ectopic accumulation of melanocytes in the deep dermis . It can also cause hypertrichosis come.
Nevus Ota
In the case of the nevus ota, the supply area of the first or second trigeminal branch is usually affected, i.e. forehead, eye area, cheek, palate. The conjunctiva and sclera of the eye as well as the hard palate and eardrum can also be included. The occasional increased hairiness mainly affects the temple region. Because of its location, the nevus Ota is also called the nevus fuscocaeruleus ophthalmomaxillaris .
Ito nevus
In the Ito nevus, there is extensive hyperpigmentation and hypertrichosis in the shoulder area. Because of its location, the Ito nevus is also known as the fuscocaeruleus acromiodeltoides or deltoideoacromialis nevus .
Course and prognosis
The nevus ota is either present at birth or does not develop until puberty . In contrast to the Mongolian spot , it lasts a lifetime and can be very disfiguring. An effective therapy option is laser treatment .
There is the possibility of malignant degeneration into malignant melanoma , but this is very rare.
Web links
See also
other forms of dermal pigment nevi:
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 .
