McAfee classification of thoracolumbar spinal fractures

Last revised by Frank Gaillard on 16 May 2024

McAfee classification of acute traumatic spinal injuries is one of a number of thoracolumbar spinal fracture classification systems and is based on the three-column concept of the spine (of Denis). It requires CT for an accurate assessment.

Usage

Unlike the more common formal and widely used classification systems (thoracolumbar injury classification and severity score (TLICS) and AO classification of thoracolumbar injuries) that have explicit and precise classification and points schemes, the McAfee classification focuses on descriptive terms that are in common usage among clinicians, even if they are not aware of the classification system itself 2.

Classification

  • wedge compression: isolated anterior column compression (see wedge fracture)

  • stable burst: anterior and middle column compression but the posterior column is normal (see burst fracture)

  • unstable burst: anterior and middle column compression with disrupted posterior column

  • flexion-distraction 

    • anterior column compression

    • middle and posterior column: tensile failure

    • axis of flexion: posterior to anterior longitudinal ligament

  • Chance fractures

    • pure bony injuries that extend all the way through the spinal column: from posterior to anterior through the spinous process, pedicles, and vertebral body, respectively (see chance fracture)

    • axis of flexion: anterior to anterior longitudinal ligament

  • translational fractures

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