Why weight-bearing views matter for Lisfranc joint injury
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Look for lateral displacement of the second metatarsal in relation to the intermediate cuneiform on weight-bearing radiographs. A step-off of more than 3mm is abnormal.
Measure the distance between the medial cuneiform and the base of the second metatarsal on weight-bearing radiographs. A distance of more than 2.1mm is abnormal.
Plain radiographs may not effectively identify instability at the Lisfranc joint on non-weight-bearing views. Weight-bearing x-rays reveal subtle differences between the injured and uninjured sides that non-weight-bearing views can miss.
A step-off of more than 3mm between the second metatarsal and the intermediate cuneiform on weight-bearing radiographs.
A distance of more than 2.1mm between the medial cuneiform and the base of the second metatarsal on weight-bearing radiographs.
Subtle instability and widening can be easier to recognize when there is a direct comparison with the normal, uninjured side, ideally with both weight-bearing and non-weight-bearing views.
Early diagnosis is crucial to prevent premature osteoarthritis developing in the mid foot.
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Ayudamos a los radiólogos a aprender
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Esté atento a los nuevos lanzamientos y aprendizajes de las Fellowships
Ayudamos a los radiólogos a aprender
haciendo e informa con confianza
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