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Authors

Paulo Barbosa, Felix Bonnaire, Kodi Kojima

Executive Editors

Steve Krikler, Chris Colton

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Infrasyndesmotic, posteromedial fracture with LCL rupture

If the lateral malleolus is intact, and the lateral injury involves a rupture of the lateral collateral ligaments (the calcaneo-fibular ligament and the anterior and posterior talo-fibular ligaments), with a posteromedial malleolar fracture, this is classified as an AO/OTA 44A3.1 fracture.

In some cases, the medial fracture may cause a circumferential lesion, with a posterior extension. These are classified as AO/OTA 44A3 fractures.  There is no special fracture type in the Lauge-Hansen classification of supination-adduction fractures that describes this posterior marginal extension of the medial lesion.  Complete radiological evaluation (AP, lateral and AP with internal rotation) is crucial for correct classification and decision making.

Rupture of the lateral collateral ligaments (AO/OTA 44A3.1)
Complete radiological evaluation (AP, lateral and AP with internal rotation) is crucial for correct classification and decision making.
definition