Styloid Process of the Radius, Lateral View

Description

Radial styloid process dominates the lateral margin of the distal radius, projecting distally beyond the adjacent articular surface and forming the most lateral bony prominence at the wrist. From this fixed lateral perspective, the styloid tapers inferiorly and slightly anteriorly relative to the radial shaft, with the distal radius metaphysis widening proximodistally behind it. The contour of the radial styloid frames the lateral border of the radiocarpal joint, where the scaphoid facet lies immediately medial and proximal to the tip. Palpation and landmarking at the wrist often start here. The radial styloid sits just dorsal to the course of the radial artery as it turns through the anatomical snuffbox, and it anchors the radial collateral ligament and brachioradialis tendon, so subtle differences in its length and angulation change how you teach surface anatomy, ligamentous stability, and tendon insertions in one glance. Clinically, the styloid is the key fragment in a Chauffeur (Hutchinson) fracture from axial load and radioscaphoid impaction, and its relationship to the first dorsal extensor compartment helps explain why de Quervain tenosynovitis pain localizes near the styloid during Finkelstein testing. A hard landmark. Use this illustration in upper limb osteology teaching, wrist anatomy lab manuals, and radiology or orthopaedic texts when correlating distal radius fracture patterns with palpable landmarks on physical exam. It also fits operative planning discussions that reference radial-sided approaches, ligament attachments, and styloid fixation points. Anatomical accuracy verified by SciePro's Medical Advisory Board.