Knee Ligament Injuries
A 32-year-old motorcyclist presents after a collision with varus stress applied to his left knee. He reports feeling his knee "give way" and has difficulty walking on uneven ground. Examination reveals varus laxity at 30 degrees of knee flexion, increased external rotation of the tibia at 30 degrees, and a positive dial test with 15 degrees increased external rotation compared to the contralateral side. MRI shows injury to the fibular collateral ligament, popliteus tendon, and popliteofibular ligament. Regarding posterolateral corner (PLC) injuries:
Mark each as TRUE or FALSE
The posterolateral corner consists of three main static stabilizers: fibular (lateral) collateral li...
Mechanisms include varus force (direct blow to anteromedial knee), hyperextension with varus, or con...
The PLC is the primary restraint to valgus stress; the LCL is a dynamic stabilizer; PLC injuries are...
Clinical examination includes varus stress test at 0 and 30 degrees flexion (increased laxity at 30 ...
Non-operative treatment is rarely successful for complete PLC injuries; surgical reconstruction is r...
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Click T (True) or F (False) for each option