Ultrasound of Intersection Syndrome

What this episode covers

In this radiology lecture, we review the ultrasound appearance of intersection syndrome, a friction tenosynovitis at the forearm and wrist! Key teaching points include: * Intersection syndrome is an overuse tenosynovitis (inflammation of tendon and tendon sheath) secondary to repetitive friction at site of intersection * Proximal intersection syndrome: Occurs at musculotendinous junctions of first extensor wrist compartment (extensor pollicis brevis, abductor pollicis longus) crossing tendons of second compartment (extensor carpi radialis brevis, extensor carpi radialis longus). Intersection occurs 4-8 cm proximal to Lister’s tubercle * Results from repetitive extension/flexion activities: Rowing, skiing, racket sports, horseback riding, weight-lifting * Clinical presentation: Radial forearm or wrist pain, worsens with extension/flexion * Ultrasound findings: Pain with transducer pressure at intersection site, peritendinous edema and fluid * Distal intersection syndrome: Less common, occurs at third compartment tendon (extensor pollicis longus) crossing second compartment tendons distal to Lister’s tubercle * Tx: Rest, activity modification, splinting, anti-inflammatory medications. Corticosteroid injection or surgical release may be required if refractory To learn more about the Samsung RS85 Prestige ultrasound system, please visit: https://www.bostonimaging.com/rs85-prestige-ultrasound-system-4 Click the YouTube posts tab or follow on social media for bonus teaching material posted throughout the week! Spotify: https://spoti.fi/462r0F2 Instagram: https://www.instagram.com/Radquarters/ Facebook: https://www.facebook.com/Radquarters/ X (Twitter): https://twitter.com/Radquarters Reddit: https://www.reddit.com/user/radiologistHQ/ This video is for informational purposes only. It does not replace the advice or counsel of a doctor or health care professional.