intersection syndrome

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A tenosynovitis of the forearm; an overuse injury of the tendons that pass through the forearm and cross the wrist to insert into the hand. It is characterized by crepitating swelling of the tendon sheaths of the extensor pollicis brevis and abductor pollicis longus, about 5 cm proximal to the wrist where they cross over the tendons of the extensor carpi radialis. Treatment typically consists of rest from the precipitating activity, and anti-inflammatory procedures including NSAIDS, ice, and ultrasound. Steroid injections made into the tendon sheath parallel to, but definitely not into, the tendon usually resolve the condition rapidly. See also de Quervain's disease.

Subjects: Sports and Exercise Medicine.

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