hereditary hemorrhagic telangiectasia n.
An inherited disease, usually beginning after puberty, characterized by multiple telangiectases and by fragile capillaries that break easily and bleed into the skin and mucous membranes. Also called Osler's disease, Rendu-Osler-Weber disease, Rendu-Osler-Weber syndrome.
hereditary hemorrhagic telangiectasia
hereditary disorder characterized by bleeding from local capillary malformations. In Osler-Rendu-Weber disease, capillaries in the fingertips and around the oral and nasal cavities are enlarged and have unusually thin walls; they are easily broken by accidental bumping or jarring, resulting in the release of blood into the tissues or externally. Blood clotting is normal, but frequent bleeding from the nose and elsewhere can cause severe anemia. Frequent nosebleeds may be treated with cauterization or laser; bleeding in vital areas requires surgery
Learn more about hereditary hemorrhagic telangiectasia with a free trial on Britannica.com.