What is De Quervain's Tenosynovitis?
De Quervain's tenosynovitis is an inflammatory condition affecting the tendons of the first dorsal compartment of the wrist, which move the thumb away from the hand. Thickening of the tendon sheath and surrounding tissues leads to pain and restricted tendon movement. The condition is distinct from arthritis and nerve compression and is localised to the radial (thumb) side of the wrist.