UMEM Educational Pearls

Category: Orthopedics

Title: Posterolateral Corner Injury

Keywords: Posterolateral Corner Injury, PCL, ACL, knee (PubMed Search)

Posted: 6/13/2015 by Brian Corwell, MD
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Posterolateral Corner Injury

Hx: hyperextension injury (contact and non contact), varus directed blow to flexed knee, direct blow to anteriomedial knee. Report instability symptoms when knee is in full extension.

PE: Varus stress testing

Varus laxity at 0 indicate LCL and cruciate ligament (ACL/PCL) injury

Varus laxity at 30 indicates LCL injury

Dial test - inspects the external rotation at the knee joint/performed in both 30 and 90 knee flexion. The dial test inspects the external rotation at the knee joint

Positive at 30 = > 10 external rotation asymmetry = isolated PCL injury

Positive at 30 & 90 = Posterior lateral corner injury and PCL injury