Definition of telangiectasia in US English:


(also telangiectasis)


  • A condition characterized by dilation of the capillaries, which causes them to appear as small red or purple clusters, often spidery in appearance, on the skin or the surface of an organ.

    • ‘A milder form of the same disease, termed Leber's miliary aneurysms, can present later in life as a localised cluster of dilated capillaries, aneurysms, and telangiectasia, typically in the temporal quadrants of the retina.’
    • ‘Patients should be advised to use potent topical steroids sparingly because excessive use may lead to atrophy of the skin and telangiectasis.’
    • ‘Tortuous dilation of the hepatic arteries and capillary telangiectasia of the hepatic surface in the operative field were remarkable.’
    • ‘Telangiectasia may be a feature of hereditary haemorrhagic telangiectasia or systemic sclerosis.’
    • ‘More than 70% of pulmonary arteriovenous malformations are associated with the genetic condition, hereditary hemorrhagic telangiectasia, also known as the Osler-Weber-Rendu syndrome.’


Mid 19th century: modern Latin, from Greek telos ‘end’ + angeion ‘vessel’ + ektasis ‘dilatation’.