The tarsometatarsal interosseous ligaments are the deep interosseous bands connecting the cuneiform and cuboid bones directly to the adjacent metatarsal bases at the TMT joint level, supplementing the true Lisfranc ligament.
Provide deep interosseous TMT joint stability supplementary to the dorsal and plantar TMT capsular ligaments, resist interosseous TMT separation during axial loading, and complete the three-dimensional TMT ligamentous constraint.
The interosseous TMT ligaments are assessed in complete Lisfranc injury evaluation — their disruption indicates more severe instability than isolated dorsal ligament tears. MRI demonstrates their integrity in subtle Lisfranc injuries.
MRI evaluation of the interosseous tarsometatarsal ligaments to fully characterise Lisfranc complex instability and guide surgical planning for fixation or arthrodesis.
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