Dorsal Radial Tubercle Of The Radius, Lateral View

Description

Lister’s tubercle on the dorsal distal radius anchors the composition, projecting posteriorly near the junction of the radial shaft and the carpal articular surface. From a lateral forearm perspective, the radial styloid lies distal and slightly anterior to the tubercle, while the dorsal cortex of the radius forms a shallow ridge that separates the extensor compartments. Immediately ulnar to the tubercle, a groove marks the course of the extensor pollicis longus tendon as it turns obliquely toward the thumb, and the adjacent surfaces suggest where extensor carpi radialis longus and brevis tendons pass on the radial side. Small landmark. Big implications. Surgeons and trainees rely on Lister’s tubercle as a fixed bony reference when orienting the dorsal wrist, because its relationship to the extensor retinaculum and the third dorsal compartment helps localize tendon pathology and dorsal portals without guessing from soft tissues alone. Attritional rupture of extensor pollicis longus after distal radius fracture, classically following a Colles-type injury, often relates to friction or ischemia within the tendon groove adjacent to this tubercle, and this illustration makes that topography easy to teach with a single, unambiguous lateral view. The bony contours also support discussions of palpation landmarks for physical examination and for guiding injections around the dorsal radial compartments. Use this illustration in upper limb anatomy courses, orthopedic and hand surgery teaching files, and textbook figures covering distal radius surface anatomy, extensor tendon compartment mapping, and post fracture tendon complications. It also fits clinical handouts that explain why dorsal radial pain localizes near the radius and why the lister tubercle is palpated during wrist assessment. Anatomical accuracy verified by SciePro's Medical Advisory Board.