SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
De Quervain's syndrome. Coloured X-ray of the inside of the wrist of a patient with De Quervain's syndrome, or stenosing tenosynovitis, a painful inflammation of the tendons on the inside of the wrist. At top is the radius, the thicker of the two forearm bones, and at bottom are the bones of the wrist. There is a bony protrusion on the lower part of the radius. Two of the tendons that move the thumb run through a lubricated tunnel over these wrist bones. De Quervain's syndrome is a swelling of the lining of this tunnel and the tendons in it. It causes pain and can restrict the movement of the thumb. Treatment is with anti-inflammatory drugs and in some cases surgery.
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