Bone projection on the radius
The radial styloid process is a projection of bone on the lateral surface of the distal radius bone .
Structure
The radial styloid process is found on the lateral surface of the distal radius bone .[1] brachioradialis attaches at its base.[2] radial collateral ligament of the wrist attaches at its apex. The lateral surface is marked by a flat groove for the tendons of the abductor pollicis longus and extensor pollicis brevis .
Clinical significance
Breakage of the radius at the radial styloid is known as a Chauffeur's fracture ; it is typically caused by compression of the scaphoid bone of the hand against the styloid.
De Quervain syndrome causes pain over the styloid process of the radius.[3] [4] inflamed extensor pollicis brevis tendon and abductor pollicis longus tendon around it.[4] [5]
The styloid process of the radius is a useful landmark during arthroscopic resection of the scaphoid bone .[6]
A prominent styloid process of the radius makes applying a wrist splint more difficult.[7]
This article incorporates text in the public domain from page 220 of the 20th edition of Gray's Anatomy (1918)
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