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White hand sign
The white hand sign is a medical sign observed as a visible whitening of skin on the hand when the subject elevates the hands above the shoulder girdle with fingers pointing to the ceiling and palms facing forward. It results from this change in position causing a compression of the subclavian artery and temporary loss of circulation, as often occurs in patients with thoracic outlet syndrome, a complex syndrome involving the compression of various nerves and blood vessels between the axilla (armpit) and the base of the neck.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "White_hand_sign". A list of authors is available in Wikipedia.|