Nevus

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Related to nevoid: nevoid hypertrichosis

naevus

(US), nevus
any congenital growth or pigmented blemish on the skin; birthmark or mole

Nevus

 

(mole, birthmark), a congenital malformation of the skin in which some areas differ in color from the rest of the skin and/or have a peculiar warty appearance. Nevi are not confined to any particular area. They can be present at birth or develop during the first few years of life or even later.

Vascular nevi, or hemangiomas, are characterized by varying sizes, uneven edges, and a pink or bluish red color. They become pale when pressed and may be flat, superficial (capillary nevi), or nodular. They are embedded in the thickest part of the skin and have an uneven cavernous surface (cavernous nevi). Verrucoid nevi occur as singular or multiple patches of different shapes, are muddy gray or brown in color, and have an uneven keratotic surface. Pigmented nevi are light brown to almost black in color; they can be the size of a pinhead, or they can cover large areas of the skin. The surfaces of pigmented nevi may be uneven and covered with hair (Becker’s nevi).

Self-treatment of pigmented spots is dangerous because frequent injury may cause them to degenerate into melanomas, whereupon the nevi enlarge, become firmer, and change color. New pigmented spots may appear in the same area, and the regional lymph nodes may become enlarged.

Electrocoagulation, cryotherapy, surgical dissection, and radiotherapy are used to treat nevi.

REFERENCE

Shanin, A. P. “Nevusy.” In Mnogotomnoe rukovodstvo po dermatologii, vol. 3. Moscow, 1964.

I. IA. SHAKHTMEISTER

nevus

[′nē·vəs]
(medicine)
A lesion containing melanocytes.
References in periodicals archive ?
Marcus Caro of Chicago, I described, presented, and promoted the nevoid basal cell cancer symptom complex as a new syndrome and stressing the destructive behavior of the multiple, early onset, basal cell carcinomas.
A representative case of nevoid melanoma with an abnormal FISH test result is illustrated in Figure 5, A through D.
Unilateral nevoid nelengiectasia with no ostrogen and progesterone receptors in a pediatric patient.
Unilateral nevoid telenjiektazi (UNT), unilateral dagilim gosteren, yuzeyel telenjiektazik yamalarla karakterize, nadir gorulen bir hastaliktir.
Humbert P, Laurent R, Faivre B, Agache P: Nevoid basal cell carcinoma syndrome and acrokeratosis verruciformis.
Nadir gorulen olgularda topikal VitD analogu kullanimi HASTALIK BASARI ORANI Kaynak Hiperkeratotik palmoplantar egzama (n=5) %80 50 Akantozis nigrigans ile iliskili meme basi hiperkeratozu (n=1) %100 51 Areolanin nevoid hiperkeratozu (n=2) %100 52 Dev verru (n=1) Parsiyel iyilesme 53 Dissemine superfisial aktinik porokeratoz (n=1) %100 54 Grover hastaligi (n=1) %100 55 Lokalize epidermodisplazia verrusiformis (n=1) Parsiyel iyilesme 56 Nevus komedonikus (n=1) Parsiyel iyilesme 57 Morfea (n=1) %100 37 Lineer skleroderma (PUVA ile kombine) (n=2) Parsiyel iyilesme 38
2-4) However, no one has reported an FR of the tongue in a patient with nevoid basal cell carcinoma syndrome (NBCCS).
Nevoid basal cell carcinoma (Gorlin's) syndrome (NBCCS) is an autosomal-dominant disorder that is caused by a mutation of both alleles of the PTCH gene.
This is especially true for small cell or nevoid melanomas for which it may be difficult to assess small lymph node metastases.
According to a source cited in the article by Palacios et al, how many patients with nevoid basal cell carcinoma (Gorlin's) syndrome have no family history of the syndrome?
However, there is a high unmet medical need for patients with multiple tumors that cannot be adequately treated with these therapies -- such as those with basal-cell nevoid syndrome or patients whose tumors recur following local treatment.
Several "proof-of-principle" studies (23-26) have shown potential applications of FISH for solving a variety of diagnostic dilemmas in the evaluation of melanocytic tumors, including differentiating blue nevus-like metastasis from blue nevus, mitotically active nevus from nevoid melanoma, and dysplastic nevi from superficial spreading melanoma.