What mechanism has most likely caused this type of injury?
This is a typical result of an inversion injury.
Findings:
CT shows mild offset at the calcaneocuboid and talonavicular joint. There are also bony avulsions at the following locations:
- superior to the talar articular surface of the navicular bone at the distal insertion of the dorsal talonavicular ligament
- at the superolateral portion of the anterior calcaneal process at the proximal insertion of the dorsal calcaneocuboid ligament
- lateral to the cuboid bone, corresponding to the distal insertion of an accessory lateral band of the dorsal calcaneocuboid ligament
Impression:
Dorsal talonavicular and calcaneocuboid ligament avulsions in the setting of a midtarsal sprain.