Imaging of the Cervical Spine > Fractures > Hangman's

Hangman's Fracture

Description: fractures through the pars interaticularis of the axis resulting from hyperextension and distraction.

Mechanism: hyperextension (e.g. hanging, chin hits dashboard in MVA).

Radiographic features: (best seen on lateral view)

1. Prevertebral soft tissue swelling.
2. Avulsion of anterior inferior corner of C2 associated with rupture of the anterior longitudinal ligament.
3. Anterior dislocation of the C2 vertebral body.
4. Bilateral C2 pars interarticularis fractures.

Stability: unstable