Acrocyanosis

Blueness of the extremities (the hands and feet). Acrocyanosis is typically symmetrical. It is marked by a mottled blue or red discoloration of the skin of the fingers and wrists and the toes and ankles and by profuse sweating and coldness of the fingers and toes. Acrocyanosis is caused by narrowing (constriction) of small arterioles (tiny arteries) toward the end of the arms and legs.

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A circulatory disorder in which the hands, and less commonly the feet, are persistently cold and blue; some forms are related to Raynaud phenomenon. SYN: Crocq disease, Raynaud sign. [acro- + G. kyanos, blue, + -osis, condition]

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ac·ro·cy·a·no·sis .ak-rō-.sī-ə-'nō-səs n, pl -no·ses -.sēz blueness or pallor of the extremities usu. associated with pain and numbness and caused by vasomotor disturbances (as in Raynaud's disease) specif a disorder of the arterioles of the exposed parts of the hands and feet involving abnormal contraction of the arteriolar walls intensified by exposure to cold and resulting in bluish mottled skin, chilling, and sweating of the affected parts

ac·ro·cy·a·not·ic -'nät-ik adj

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ac·ro·cy·a·no·sis (ak″ro-si″ə-noґsis) [acro- + cyanosis] symmetrical cyanosis of the extremities, with persistent, uneven blue or red discoloration of the skin of the digits, wrists, and ankles accompanied by profuse sweating and coldness of the digits. Called also Raynaud sign.