Raynaud disease

A condition resulting in skin discoloration of the fingers and/or toes when a person is exposed to changes in temperature (cold or hot) or to emotional events. This condition can occur alone or as a part of another disease (such as rheumatoid arthritis). When the condition occurs alone it is referred to as "Raynaud disease" or primary Raynaud phenomenon. When it accompanies other diseases (such as rheumatoid arthritis), it is called secondary Raynaud phenomenon. The skin discoloration occurs because an abnormal spasm of the blood vessels causes a diminished blood supply. Initially, the digits involved turn white because of diminished blood supply, then turn blue because of prolonged lack of oxygen and finally, the blood vessels reopen, causing a local "flushing" phenomenon, which turns the digits red. This three-phase color sequence (white to blue to red), most often upon exposure to cold temperature, is characteristic of Raynaud disease. The disease is named for the French physician Maurice Raynaud (1834-1881).

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a primary or idiopathic vascular disorder characterized by bilateral attacks of Raynaud phenomenon; it affects females more often than males. Called also Raynaud gangrene.

Medical dictionary. 2011.

Look at other dictionaries:

  • Raynaud disease (gangrene) phenomenon sign — Ray·naud disease (gangrene), phenomenon, sign (ra noґ) [Maurice Raynaud, French physician, 1834–1881] see under disease and phenomenon, and see acrocyanosis …   Medical dictionary

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  • Disease, Raynaud — A condition resulting in skin discoloration of the fingers and/or toes when a person is exposed to changes in temperature (cold or hot) or to emotional events. This condition can occur alone or as a part of another disease (such as rheumatoid… …   Medical dictionary

  • Raynaud phenomenon — intermittent bilateral ischemia of the fingers, toes, and sometimes ears and nose, with severe pallor and often paresthesias and pain, usually brought on by cold or emotional stimuli and relieved by heat; it is usually due to an underlying… …   Medical dictionary

  • Raynaud's phenomenon — [rā nōz′] n. 〚after M. Raynaud (1834 81), Fr physician〛 a secondary circulatory disorder, often associated with a primary vascular disease, characterized by changes of blood flow resulting in white, bluish, or red hands and feet: as a primary… …   Universalium

  • Raynaud's phenomenon — [rā nōz′] n. [after M. Raynaud (1834 81), Fr physician] a secondary circulatory disorder, often associated with a primary vascular disease, characterized by changes of blood flow resulting in white, bluish, or red hands and feet: as a primary… …   English World dictionary

  • Raynaud — may refer to:Medicine* Raynaud s disease * Raynaud s phenomenonPeople* Dr. Alain Raynaud, Bordeaux winemaker of Château Quinault * Michel Raynaud, (1938 ndash;) mathematician working in algebraic geometry …   Wikipedia

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