Knee Ligaments
A 28-year-old motorcyclist sustains a hyperextension-varus injury to the right knee. Examination reveals varus instability at 30 degrees of flexion, positive dial test at both 30 and 90 degrees, and 1+ posterior drawer. He also has weakness of ankle dorsiflexion. The surgeon discusses posterolateral corner anatomy and the importance of recognizing combined injuries. Regarding the posterolateral corner of the knee:
Mark each as TRUE or FALSE
The posterolateral corner consists of three main structures: lateral collateral ligament (LCL) provi...
The dial test (external rotation) is positive at 30 degrees only in isolated PLC injury; if positive...
Isolated PLC injuries are more common than combined injuries; the common peroneal nerve is rarely af...
Common peroneal nerve injury occurs in 10-25% of PLC injuries and must be assessed (ankle dorsiflexi...
Unaddressed PLC injuries significantly increase cruciate graft failure rates (37% ACL failure with u...
Answer the questions to see explanations
Click T (True) or F (False) for each option