Nevus


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Related to Nevus: epidermal nevus, Nevus of Ota, Melanocytic nevus

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 ?
Commissiong, President & CEO of Amarantus stated "Congenital Giant Hairy Nevus can be a devastating condition affecting not only the physical, but also the psychosocial maturation of newborns as they grow into childhood.
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Qocukluk caginda agiz icinde gorulen beyaz lezyonlarda beyaz sungersi nevus da akla gelmelidir.
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At subsequent follow-ups, the patient underwent four additional surgical corrections under local anesthesia for excision of the remaining nevus.
Ozellikle Spitz nevus ve Spitzoid melanomun histopatolojik benzerlikleri ve gocuk hastaya melanom tanisi koymanin zor olmasi nedeniyle bazen en deneyimli patologlar tarafindan bile melanom tanisi atlanabilmektedir (10).
Human homolog of patched, a candidate gene for the basal cell nevus syndrome.
look into epidermal nevus syndrome (ENS) (a rare disorder characterized by distinctive, colored birthmarks on the skin; neurological and skeletal abnormalities may also occur).
For example, scientists recently discovered that mutations in the human version of a gene that controls fruit fly growth and development are the likely cause of both the basal cell nevus syndrome, a rare inherited disorder, and sporadic basal cell carcinoma of the skin, the most common human cancer.
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Abys was born in Puerto Rico with hairy congenital nevus, a rare condition that causes dense hair to sprout between her eyes, over her nose and over more than half her face, puckering one eye.