The Chopart Variant Dislocation: Plantar Dislocation of the Cuboid and Navicular

Area of Science:

• Orthopedic surgery
• Foot and ankle anatomy
• Trauma and injury management

Background:

• Chopart joint injuries are complex, often involving fractures.
• Understanding midfoot anatomy is crucial for diagnosing and treating dislocations.
• Low-energy mechanisms can cause significant foot and ankle trauma.

Observation:

• A unique Chopart dislocation variant presented as a plantar cuboid and navicular dislocation.
• The injury occurred in a 48-year-old male from a low-energy plantarflexion moment.
• No concomitant fractures were present.

Findings:

• Open reduction and internal fixation (ORIF) effectively treated this complex midfoot dislocation.
• Anatomic restoration was achieved, leading to excellent functional outcomes.
• Follow-up at 20 months demonstrated sustained positive results.

Implications:

• This case highlights the importance of considering unusual Chopart dislocation variants.
• Early open reduction should be strongly considered for complex Chopart dislocations.
• Prompt surgical intervention is key for restoring anatomy and function in severe midfoot injuries.