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Lens dislocation
Joseph Junewick, MD FACR
over 11 years ago
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Unilateral Interfacetal Fracture Dislocation

Case Detail

Anatomy: Brain-Spine
Joseph Junewick, MD FACR
Diagnostic Category: Trauma
Created: over 10 years ago
Updated: over 10 years ago
Tags: PEDS
Modality/Study Types: CT MR
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13 year old male in motor vehicle accident.

Case Images


Unilateral Interfacetal Fracture Dislocation


CT – Axial images with sagittal reformats demonstrate unilateral locked facet on the right at C3-C4, right pedicle/facet fracture, anterior translation of C3 relative to C4, and avulsion of the posterior longitudinal ligament at C3.

MR – Sagittal IR and axial T1 and T2 images show injuries of the posterior ligamentous complex, posterior displacement of the posterior longitudinal ligament, precervical edema, and absence of the right vertebral artery flow void.


Unilateral facet fracture dislocation is the result of hyperflexion and rotation. This injury is mechanically stable while unreduced but becomes unstable with reduction. Vertebral artery injuries are very common.

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