naevus


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Related to naevus: lentigo, dermatofibroma, naevus spilus

ne·vus

, pl. nevi (nē'vŭs, -vī)
1. A circumscribed malformation of the skin, especially one that is colored by hyperpigmentation or increased vascularity; a nevus may be predominantly epidermal, adnexal, melanocytic, vascular, or mesodermal, or a compound overgrowth of these tissues.
2. A benign localized overgrowth of melanin-forming cells of the skin at birth or appearing early in life.
Synonym(s): mole (1) , naevus.
[L. naevus, mole, birthmark]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

naevus

Any coloured growth or mark on the skin present at birth. A birthmark. From Latin naevus , a spot or blemish.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

naevus

  1. any birthmark, usually a sharply defined reddish patch on the skin.
  2. a pigmented mole on the skin.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

naevus

Any localized area of pigmentation or vascularization of the skin or eye tissues, usually benign and congenital. Note: also spelt nevus. Plural: naevi.
choroidal naevus A benign accumulation of melanocytes in the choroid. It affects some 10% of the population. Ophthalmoscopically it appears as a slate-grey lesion, flat or minimally elevated, oval or circular. It is asymptomatic. With time drusen may also appear. See melanocyte; choroidal melanoma.
conjunctival naevus A naevus located on the conjunctiva, most often near the limbus. It appears as a yellowish-red area or deeply pigmented mass usually before the age of 20. A pigmented conjunctival naevus must be distinguished from an acquired melanoma of the conjunctiva which occurs later in life (after the third decade, is typically unilateral and may become malignant). A conjunctival naevus rarely becomes malignant. It can be excised if cosmetically undesirable or has enlarged to such a degree as to irritate the eye.
flammeus naevus See Sturge- Weber syndrome.
iris naevus A pigmented spot of variable size on the surface of the iris. It is composed of an accumulation of melanocytes in the iris stroma. It is usually benign but occasionally it may transform itself into a malignant melanoma. See melanocyte; iris melanoma; ICE syndrome.
naevus of Ota A benign, congenital, usually unilateral, accumulation of melanocytes on the cheek, eyelids, forehead, nose or sclera. Some naevi may become malignant melanoma. Syn. oculocutaneous melanosis; oculodermal melanocytosis. See ocular melanocytosis; melanosis.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

ne·vus

, pl. nevi (nē'vŭs, -vī)
Circumscribed dermal malformation, especially if hyperpigmented or with increased vascularity; may be predominantly epidermal, adnexal, melanocytic, vascular, or mesodermal, or a composite.
Synonym(s): naevus
[L. naevus, mole, birthmark]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
What naevus is dysplastic, a syndrome and the commonest precursor of malignant melanoma?: a riddle and an answer.
Naevus lipomatosus cutaneous superficialis of Hoffmann-Zurhelle with angiokeratoma of Fordyce.
Other immunohistochemical markers such as MCSP (melanoma chondroitin sulphate proteoglycan) or PRAME (preferentially expressed antigen of melanoma) are under investigation as they have been shown to discriminate a conjunctival naevus from a melanoma (11) because of significantly higher expression in the latter.
Porokeratotic eccrine ostial and dermal duct naevus with dermatomal trunk involvement: Literature review and report on the efficacy of laser treatment.
Molecular evidence that halo in Sutton's naevus is not vitiligo.
Shwayder, "Mucinous eccrine naevus: case report and review of the literature," Clinical and Experimental Dermatology, vol.
Response of naevus of Ota to Q-switched ruby laser treat-ment according to lesion colour.
It may resemble cinically to inflammatory linear verrucous epidermal naevus (ILVEN).
A blue naevus of the prostate: a light microscopic study including an investigation ofS-100 protein positive cells in the normal and in the diseased gland.
Three different epidermal naevi with no organ involvement: Sebaceous naevus, naevus comedonicus and Becker's naevus.
Epithelioid blue naevus of the genital mucosa: report of four cases.