The EPL tendon takes a sharp turn around Lister tubercle (the dorsal radial ridge) before crossing the anatomical snuffbox to insert on the thumb distal phalanx. This change of direction creates friction against the tubercle and reduces the blood supply to this portion of the tendon, making it susceptible to attrition rupture after minimally displaced distal radius fractures (2 to 12 weeks post-injury). EPL rupture produces drooping of the thumb tip without pain.
Thumb IP joint extension; retropulsion of the thumb; forms the dorsal border of the anatomical snuffbox
EPL rupture after distal radius fracture (the Thompson test — asking the patient to place the hand flat and lift the thumb off the table) is managed with extensor indicis proprius transfer rather than primary repair, as the tendon ends are typically too frayed for direct repair. The EIP transfer reliably restores thumb IP extension.
Tendon disruption at Lister tubercle after distal radius fracture producing sudden painless thumb droop, managed with EIP tendon transfer.
This website uses cookies to enhance your experience. Some are essential for site functionality, while others help us analyze and improve your usage experience. Please review your options and make your choice.
If you are under 16 years old, please ensure that you have received consent from your parent or guardian for any non-essential cookies.
Your privacy is important to us. You can adjust your cookie settings at any time. For more information about how we use data, please read our privacy policy. You may change your preferences at any time by clicking on the settings button below.
Note that if you choose to disable some types of cookies, it may impact your experience of the site and the services we are able to offer.
Some required resources have been blocked, which can affect third-party services and may cause the site to not function properly.
This website uses cookies to enhance your browsing experience and ensure the site functions properly. By continuing to use this site, you acknowledge and accept our use of cookies.
