Lister's tubercle
Bony prominence on the dorsal side of the dital radius From Wikipedia, the free encyclopedia
Lister's tubercle or dorsal tubercle of radius is a bony prominence located at the distal end of the radius. It is palpable on the dorsum of the wrist.
| Lister's tubercle | |
|---|---|
.png) Left hand. Lister's tubercle shown. | |
| Details | |
| Identifiers | |
| Latin | tuberculum dorsale |
| TA98 | A02.4.05.017 |
| TA2 | 1226 |
| FMA | 23527 |
| Anatomical terminology | |
Structure
Lister's tubercle is found on the dorsal distal radius.[1] It varies in size and shape significantly.[2][3] It can range from around 2 to 6 mm in height (averaging 3 mm), and around 6 to 26 mm in length (averaging 13 mm).[2][3] Lister's tubercle consists of two peaks including radial peak and ulnar peak.[4]
Function
Lister's tubercle serves as a pulley for the tendon of extensor pollicis longus, which wraps around the medial side and takes a 45° turn.[1][2][5]
Clinical significance
Lister's tubercle is used as a useful landmark during wrist arthroscopy and other wrist surgery.[1][6] It is palpable on the dorsum of the wrist.[1] It is often difficult to clearly distinguish with radiography.[1]
Hyperextension of the wrist can lead to fracture of Lister's tubercle, as pressure is increased from the extensor pollicis longus tendon.[7] An "island-shaped" fracture can also expose the tendon to a rough edge and lead to tendon rupture (usually long after the initial fracture).[8]
References
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