Posterolateral corner injury of the knee
Updates to Article Attributes
Posterolateral corner injury of the knee can occur in isolation or with other internal derangements of the knee, particularly cruciate ligament injuries.
The importance of injuries to the posterolateral ligamentous complex lies in the possible long term joint instability and cruciate graft failure if these are not identified and treated.
Epidemiology
These are thought to account for approximately 2% of acute ligamentous injuries of the knee 4. It is often seen in sports related injuries.
Clinical features
Trauma to the anteromedial tibia while in extension is a frequent cause of this type of injury by producing varus stress. Patients often present with symptoms due to associated cruciate ligament injury or peroneal nerve damage.
Pathology
There is no consensus between authors and textbooks in what constitutes the posterolateral ligamentous complex. The four main structures are:
- lateral (fibular) collateral ligament
- popliteus muscle
- popliteofibular ligament
- biceps femoris tendon
Radiographic features
MRI
Components of the posterolateral corner that with some variability can be identified on MRI are:
- biceps femoris tendon
- fibular collateral ligament
- popliteus tendon
- popliteus musculotendinous complex including:
- popliteofibular ligament
- fabellofibular ligament
- arcuate ligament
-<p><strong>Posterolateral corner injury of the knee</strong> can occur in isolation or with other internal derangements of the knee, particularly cruciate ligament injuries.</p><p>The importance of injuries to the <a title="Posterolateral ligamentous complex of the knee" href="/articles/posterolateral-ligamentous-complex">posterolateral ligamentous complex </a>lies in the possible long term joint instability and cruciate graft failure if these are not identified and treated.</p><h4>Epidemiology</h4><p>These are thought to account for approximately 2% of acute ligamentous injuries of the knee <sup>4</sup>. It is often seen in sports related injuries.</p><h4>Clinical features</h4><p>Trauma to the anteromedial tibia while in extension is a frequent cause of this type of injury by producing varus stress. Patients often present with symptoms due to associated cruciate ligament injury or peroneal nerve damage.</p><h4>Pathology</h4><p>There is no consensus between authors and textbooks in what constitutes the posterolateral ligamentous complex. The four main structures are:</p><ul>- +<p><strong>Posterolateral corner injury of the knee</strong> can occur in isolation or with other internal derangements of the knee, particularly cruciate ligament injuries.</p><p>The importance of injuries to the <a href="/articles/posterolateral-ligamentous-complex">posterolateral ligamentous complex </a>lies in the possible long term joint instability and cruciate graft failure if these are not identified and treated.</p><h4>Epidemiology</h4><p>These are thought to account for approximately 2% of acute ligamentous injuries of the knee <sup>4</sup>. It is often seen in sports related injuries.</p><h4>Clinical features</h4><p>Trauma to the anteromedial tibia while in extension is a frequent cause of this type of injury by producing varus stress. Patients often present with symptoms due to associated cruciate ligament injury or peroneal nerve damage.</p><h4>Pathology</h4><p>There is no consensus between authors and textbooks in what constitutes the posterolateral ligamentous complex. The four main structures are:</p><ul>
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