area of tenderness: may reveal tenosynovitis of tendon sheaths between the first two extensor compartments. Only indicated to rule out other pathology X-ray of the wrist and forearm: non-specific, to rule out other abnormalities not helpful in the diagnosis. Imaging is often not required for diagnosis however, imaging may help to confirm the diagnosis and/or to rule out other conditions Pain may be associated with localized swelling or crepitus (squeaking sensation) with active or resisted wrist or thumb extension (1)ĭiagnosis of intersection syndrome is based on clinical findings Pain subsides with rest from such activities Pain is typically worse with movements of the wrist than movements of the thumb Pain worsens with activities that involve repetitive forceful wrist flexion and extension Pain is proximal to the wrist, within 4-8cm to Lister’s tubercle of the radius Patient will often present with gradual development and worsening of pain in the distal radial forearm. Extensor Carpi Ulnaris (ECU)įigure 2 – Anatomy of Intersection Syndromeįigure 3 – Surface Anatomy of Intersection Syndromeįigure 4 – Illustration of Intersection area of pain Extensor Carpi Radialis Longus and Brevis (ECRL & ECRB) 3. Abductor Pollicis Longus (APL) and Extensor Pollicis Brevis (EPB) 2. ![]() Prolonged activities that involve repetitive wrist extension and flexion increases the risk of this injury.įigure 1 – Extensor Compartments of Wrist Often found in rowers, weight lifters, and skiers. This condition is easily confused with and misdiagnosed with de Quervain’s tenosynovitis! Intersection syndrome is a chronic, overuse injury in the distal radial forearm where the tendons of the 1 st extensor compartment and the 2 nd extensor compartment cross over, resulting in bursitis or tenosynovitis of either or both tendon sheaths. ![]() ![]() Intersection Syndrome (Also known as crossover syndrome Oarsman’s wrist)
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