12 min
Ultrasound of Ganglion Cyst & Wrist Anatomy Review Radiology Lectures | Radquarters
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- Medicine
In this radiology lecture, we review the ultrasound appearance of ganglion cysts while highlighting relevant wrist ultrasound anatomy!
Key teaching points include:
* Ganglion cysts are viscous, mucin-filled collections lacking a synovial lining
* Most commonly occur at hand/wrist = Most common wrist mass
* Location: Dorsum of wrist (60%), frequently adjacent to scapholunate ligament; volar wrist (20%), often between radial artery and flexor carpi radialis tendon; flexor tendon sheath (10%); associated with DIP joint (10%)
* Grows out of tissues surrounding joint like a balloon on a stalk. May see a pedicle connecting to joint
* Usually well-defined and multilocular, can be unilocular
* Hypoechoic to anechoic with posterior acoustic enhancement
* Noncompressible: Dorsal joint recess and bursal collections will typically collapse with transducer pressure or wrist movement
* Typically no vascular flow, but septations may have vascularity. May see pulsation artifact from adjacent radial artery
* Volar cysts can extend towards median nerve and may cause carpal tunnel syndrome
* May displace or envelop radial artery
* Tx: Watchful waiting, percutaneous US-guided aspiration and steroid injection, excision
* Lister’s tubercle is a useful landmark for dorsal wrist anatomy
* Relevant dorsal extensor tendons (from radial side to ulnar): Compartment 2 = Extensor carpi radialis longus, extensor carpi radialis brevis, Compartment 3 = Extensor pollicis longus (on ulnar side of Lister’s tubercle), Compartment 4 = Extensor digitorum and extensor indicis
* Flexor carpi radialis overlies the ventral aspect of the scaphoid bone
* Pisiform and scaphoid bone form the proximal “twin peaks” of the carpal tunnel at the ventral wrist crease
* Median nerve diameter increase of 2 mm2 or more = Significant compression
To learn more about the Samsung RS85 Prestige ultrasound system, please visit: https://www.bostonimaging.com/rs85-prestige-ultrasound-system-4
Click the YouTube Community 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/
Twitter: https://twitter.com/Radquarters
Reddit: https://www.reddit.com/user/radiologistHQ/
In this radiology lecture, we review the ultrasound appearance of ganglion cysts while highlighting relevant wrist ultrasound anatomy!
Key teaching points include:
* Ganglion cysts are viscous, mucin-filled collections lacking a synovial lining
* Most commonly occur at hand/wrist = Most common wrist mass
* Location: Dorsum of wrist (60%), frequently adjacent to scapholunate ligament; volar wrist (20%), often between radial artery and flexor carpi radialis tendon; flexor tendon sheath (10%); associated with DIP joint (10%)
* Grows out of tissues surrounding joint like a balloon on a stalk. May see a pedicle connecting to joint
* Usually well-defined and multilocular, can be unilocular
* Hypoechoic to anechoic with posterior acoustic enhancement
* Noncompressible: Dorsal joint recess and bursal collections will typically collapse with transducer pressure or wrist movement
* Typically no vascular flow, but septations may have vascularity. May see pulsation artifact from adjacent radial artery
* Volar cysts can extend towards median nerve and may cause carpal tunnel syndrome
* May displace or envelop radial artery
* Tx: Watchful waiting, percutaneous US-guided aspiration and steroid injection, excision
* Lister’s tubercle is a useful landmark for dorsal wrist anatomy
* Relevant dorsal extensor tendons (from radial side to ulnar): Compartment 2 = Extensor carpi radialis longus, extensor carpi radialis brevis, Compartment 3 = Extensor pollicis longus (on ulnar side of Lister’s tubercle), Compartment 4 = Extensor digitorum and extensor indicis
* Flexor carpi radialis overlies the ventral aspect of the scaphoid bone
* Pisiform and scaphoid bone form the proximal “twin peaks” of the carpal tunnel at the ventral wrist crease
* Median nerve diameter increase of 2 mm2 or more = Significant compression
To learn more about the Samsung RS85 Prestige ultrasound system, please visit: https://www.bostonimaging.com/rs85-prestige-ultrasound-system-4
Click the YouTube Community 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/
Twitter: https://twitter.com/Radquarters
Reddit: https://www.reddit.com/user/radiologistHQ/
12 min