Transverse posterior element fractures associated with torsion

Area of Science:

• Orthopedics
• Spinal Surgery
• Radiology

Background:

• Vertebral fractures are common injuries.
• Existing classifications like Chance and Smith fractures do not fully encompass all fracture types.
• A need exists to describe and classify novel fracture patterns for accurate diagnosis and treatment.

Purpose of the Study:

• To describe a previously unrecognized class of transverse vertebral element fractures.
• To differentiate these new fractures from established types like Chance and Smith fractures.
• To detail the unique characteristics and potential mechanisms of these novel fractures.

Main Methods:

• Presentation of six clinical cases with detailed radiographic and/or CT imaging.
• Comparative analysis of fracture morphology and injury mechanism against known vertebral fracture types.
• Description of fracture location (cervical, lumbar, sacral) and associated spinal conditions.

Main Results:

• Six cases of a novel transverse vertebral element fracture class were identified.
• These fractures are characterized by torsion as the etiology, unlike flexion-based Chance/Smith fractures.
• Key differentiating features include absence of posterior ligamentous injury, minimal vertebral body extension, and a vertical avulsion fracture at the base of the transverse process.

Conclusions:

• A distinct class of transverse vertebral element fractures, driven by torsional forces, has been identified.
• These fractures present unique radiographic findings differentiating them from Chance and Smith fractures.
• Recognition of this fracture type is crucial for accurate diagnosis and appropriate management of spinal trauma.