Dorsal buckle with ulnar styloid avulsion
Fall from bike onto outstretched hand. Pain in the left wrist with reduced motion on passive and active movement.
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On the lateral view, it is easy to see the buckle fracture of the distal radius with buckling of the dorsal cortex and an intact volar cortex.
On the frontal view, there is a transverse lucency through the ulnar epiphysis that represents an ulnar styloid avulsion.