From the case:
Lisfranc ligamentous complex (illustration)
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Axial illustration demonstrating the three structures of the Lisfranc ligamentous structure:
- dorsal (green)
- interosseous (yellow)
- plantar (purple)
C1 is an abbreviation for the medial cuneiform, whilst M2-M5 represent the metatarsal bases.
Case Discussion
Axial illustration demonstrating the three structures of the Lisfranc ligamentous structure, there are variations to this anatomy,
- the interosseous ligament can be a single ligamentous band
- the planter may only have a single bundle between C1 and M2
This structure is an important stabilizer of the foot, creating a keystone-like configuration of the base of the 2nd metatarsal between the medial and lateral cuneiforms. Disruption of this ligament, known as a Lisfranc injury results in inherent instability of the midfoot and poor patient outcomes if not detected early.