Normal Anatomy and Traumatic Injury of the Midtarsal (Chopart) Joint Complex: An Imaging Primer

Radiographics. 2019 Jan-Feb;39(1):136-152. doi: 10.1148/rg.2019180102. Epub 2018 Nov 30.

Abstract

The midtarsal (Chopart) joint complex consists of the talonavicular and calcaneocuboid joints and their stabilizing ligaments. Detailed assessment of this complex at MRI can be challenging owing to frequent anatomic variation and the small size of the structures involved. Nevertheless, a wide spectrum of pathologic conditions affect the joint complex, and its imaging evaluation deserves more thorough consideration. This review focuses on MRI evaluation of normal ligamentous anatomy and common variations about the Chopart joint, presenting practical imaging tips and potential diagnostic pitfalls. Imaging findings across a spectrum of traumatic Chopart joint injuries are also reviewed, from midtarsal sprains to Chopart fracture-dislocations. Midtarsal sprains-commonly associated with ankle inversion injuries-are emphasized, along with their often predictable radiographic and MRI injury patterns. Online DICOM image stacks are available for this article. ©RSNA, 2018.

Publication types

  • Review

MeSH terms

  • Biomechanical Phenomena
  • Female
  • Fractures, Bone / diagnostic imaging*
  • Humans
  • Magnetic Resonance Imaging / methods*
  • Male
  • Osteoarthritis / diagnostic imaging
  • Sprains and Strains / diagnostic imaging*
  • Tarsal Joints / anatomy & histology*
  • Tarsal Joints / diagnostic imaging
  • Tarsal Joints / injuries*
  • Tomography, X-Ray Computed