telangiectasia (redirected from Retinal telangectasias)

telangiectasia /tel·an·gi·ec·ta·sia/ (tel-an″je-ek-ta´zhah) permanent dilation of preexisting small blood vessels, creating focal red lesions.

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hereditary hemorrhagic telangiectasia  a hereditary condition marked by multiple small telangiectases of the skin, mucous membranes, and other organs, associated with recurrent episodes of bleeding from affected sites and gross or occult melena.

spider telangiectasia  vascular spider.

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tel·an·gi·ec·ta·sia (tl-nj-k-tzh) or tel·an·gi·ec·ta·sis (-kt-ss)

n.

Chronic dilation of groups of capillaries causing elevated dark red blotches on the skin.

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tel·angi·ec·tatic (-ttk) adj.

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Telangiectasia

Abnormal dilation of capillary blood vessels leading to the formation of telangiectases or angiomas.

Mentioned in: Ataxia-Telangiectasia, Rosacea

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telangiectasia

[təlan′jē·ektā′zhə]

Etymology: Gk, telos, end, angeion, vessel, ektasis, swelling

permanent dilation of groups of superficial capillaries and venules. Common causes are actinic damage, atrophy-producing dermatoses, rosacea, elevated estrogen levels, and collagen vascular diseases. See also Osler-Weber-Rendu syndrome, spider angioma.

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telangiectasia (teˈ·lan·jē·ek·tā·zhē·),

n a permanent dilation of arterioles, venules, and capillaries due to actinic damage, atrophy-producing dermatoses, increased estrogen, rosacea, congenital collagen vascular conditions, or other conditions.

Telangiectasia.

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telangiectasia (tlan´jēektā´zh),

n 1. the dilation of the capillaries and small arteries of a region. A hereditary form (hereditary hemorrhagic telangiectasia) may appear intraorally.
2. a disorder characterized by cutaneous and mucosal vascular macules, nodules, and arterial spiders that tend to bleed sporadically.

telangiectasia, hereditary hemorrhagic (Rendu-Osler-Weber disease),

n the dilation of small vessels and capillaries resulting from a genetic factor, with a tendency to bleed. Lesions may occur on the tongue as small, raised, red to bluish-red elevations.

Hereditary hemorrhagic telangiectasia.

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telangiectasia

a vascular lesion formed by dilatation of a group of small blood vessels. It occurs in all species but is most common in the liver of cattle. See also peliosis hepatis.

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telangiectasia

A dilatation of small blood vessels (arterioles, capillaries, venules), often multiple in character. Telangiectasias create small red lesions, sometimes spidery in appearance, usually in the skin or mucous membranes, which blanch on pressure. They can develop into naevus flammeus ('port-wine stain'), a birthmark found usually on the head or neck. See Sturge-Weber syndrome.
retinal telangiectasia See Coat's disease.

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telangiectasia

Dermatology A capillary with complex and tortuous dilation seen on mucocutaneous surfaces. See Hereditary hemorrhagic telangiectasia, Rendu-Osler-Weber syndrome.