naevus

(redirected from Choroidal melanoma)
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naevus

See nevus.

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]

naevus

Any coloured growth or mark on the skin present at birth. A birthmark. From Latin naevus , a spot or blemish.

naevus

  1. any birthmark, usually a sharply defined reddish patch on the skin.
  2. a pigmented mole on the skin.

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.

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]

naevus

see nevus.
References in periodicals archive ?
A solitary ocular metastasis from a cutaneous melanoma is pigmented and difficult to distinguish from a primary choroidal melanoma, although retinal and vitreous pigmented seeding is an indication that the pigmented choroidal tumour may be a secondary lesion.
AU-011 is a first-in-class targeted therapy in development for the primary treatment of ocular melanoma, also known as uveal or choroidal melanoma, a rare and life-threatening disease.
Identification of monosomy 3 in choroidal melanoma by chromosome in situ hybridisation.
Unfortunately, even with the variety of available treatment techniques, the prognosis for choroidal melanoma has not improved significantly over the years.
That afternoon his eye was scanned and a choroidal melanoma was diagnosed.
Enucleation Versus Plaque Irradiation for Choroidal Melanoma," Ophthalmology, Vol.
Photo: At LBL, physician and physicist William Saunders prepares a patient for treatment of choroidal melanoma with helium ions.
Although choroidal melanomas may exhibit all of these characteristics, studies have demonstrated that shaggy photoreceptors and subretinal fluid are indicative of choroidal melanoma in the differential between nevus and melanoma (Figure I).
Ultrasonography differentiates between choroidal melanoma, metastasis and hemangioma with 90% accuracy.