naevus

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Related to Naevi: Melanocytic naevi

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 ?
Spitz naevi and malignant melanomas of childhood and adolescence.
Presence of cytogenetic abnormalities in Spitz naevi: a diagnostic challenge for fluorescence in-situ hybridization analysis.
Sun exposure and number of naevi in 5-6 year old European children.
Risk factors of incident melanocytic naevi: a longitudinal study in a cohort of 1 232 young German children.
The influence of painful sunburn and lifetime sun exposure on the risk of actinic keratoses, seborrhoeic warts, melanocytic naevi, atypical naevi, and skin cancer.
Sunscreen use, wearing clothes, and number of naevi in 6- to 7-year old European children.
Myxoid change within cellular blue naevi: a diagnostic pitfall.
The interrelationship of blue and common naevi. J Pathol Bacteriol.
Frequent somatic mutations of GNAQ in uveal melanoma and blue naevi. Nature.
c-KIT receptor expression in cutaneous malignant melanoma and benign melanotic naevi. Melanoma Res.