![]() Swelling and pain in the distal dorsoradial forearmÄiagnosis of Distal Intersection Syndrome.Symptoms of distal intersection syndrome include: Signs and Symptoms of Distal Intersection Syndrome Rowers, weightlifters and other athletes are particularly prone to this condition. The most common is de Quervain tenosynovitis and thumb carpometacarpal (CMC) arthritis. Multiple conditions can cause radial-sided wrist and forearm pain. The exact cause of distal intersection syndrome is unknown but is usually seen in individuals with repetitive hand or wrist movements, injury or trauma to the second extensor compartment, and inflammatory conditions such as rheumatoid arthritis and inflammatory arthritis. Extensor pollicis longus is one of the extrinsic muscles of the hand. Extensor carpi radialis longus together with extensor carpi radialis brevis produce wrist abduction and extension. Extensor pollicis brevis and abductor pollicis longus are two tendons located on the thumb side of the wrist. ![]() ![]() Tendons are covered by a thin soft sheath of tissue known as synovium. The muscles and bones of the hand are connected by thick flexible tissue called tendons. Athletics or activities that involve repetitive wrist flexion and extension leads to distal intersection syndrome. It is different from intersection syndrome which is overuse tenosynovitis particularly of the second extensor compartment (extensor carpi radialis longus and extensor carpi radialis brevis) caused due to friction from the overlying first compartment tendons (abductor polllicis longus and extensor pollicis brevis). Distal intersection syndrome is tenosynovitis of the third extensor compartment (extensor pollicis longus) where it crosses the second extensor compartment. Distal intersection syndrome also referred to as tenosynovitis of the radial wrist extensors is characterized by the radial wrist and forearm pain.
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