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Syndesmosis Injury Case 2
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Lateral malleolus fracture with syndesmosis injury (Weber C).
A/P view.
Return to Ankle Fracture.
Return to Syndesmosis Injury.
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Mortise View
- Tibiofibular clear space: (most reliable) the distance between the medial border of the fibula and the lateral border of the posterior tibia as it extends into the incisura fibularis, measured 1 cm proximal to the plafond. Normal = <6 mm in both AP and mortise views.
- Tibiofibular overlap: overlap of the lateral malleolus and the anterior tibial tubercle measured 1 cm proximal to the plafond. Normal AP view= >6 mm or >42% of the width of the fibula. Normal mortise view = >1 mm. Values progressively decrease with internal rotation.
- Medial clear space: distance between the lateral border of the medial malleolus and the medial border of the talus, measured at the level of the talar dome. In the mortise view with the ankle in neutral position, the medial clear space should be equal to or less than the superior clear space between the talar dome and the tibial plafond. Values progressively decrease with internal rotation. Increased medial clear space indicates deltoid ligament injury.
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Lateral View
Return to Ankle Fracture.
Return to Syndesmosis Injury.
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Treated with ORIF of the lateral malleolus and syndesmotic fixation.
Mortise view
Return to Ankle Fracture.
Return to Syndesmosis Injury.
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Lateral view
Return to Ankle Fracture.
Return to Syndesmosis Injury.
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