Knee Ligament Injuries
A 28-year-old rugby player sustains a varus contact injury to his left knee when tackled from the medial side. He reports immediate lateral knee pain and a sensation of instability on uneven ground. Examination reveals varus laxity at 30 degrees of knee flexion, increased external rotation of the tibia at 30 degrees compared to the contralateral side, and a positive dial test at 30 degrees only. MRI confirms injury to the LCL, popliteus tendon, and popliteofibular ligament. Regarding posterolateral corner (PLC) anatomy and function:
Mark each as TRUE or FALSE
The PLC consists of THREE MAIN STATIC STABILIZERS: the LATERAL (FIBULAR) COLLATERAL LIGAMENT (LCL) f...
The LCL is the PRIMARY RESTRAINT to VARUS stress (55% at 5 degrees, 69% at 25 degrees flexion); the ...
The LCL attaches to the medial femoral epicondyle; the popliteus tendon is intra-articular throughou...
The COMMON PERONEAL NERVE courses around the fibular neck superficial to the lateral gastrocnemius a...
The popliteus tendon has both INTRA-ARTICULAR (femoral attachment and hiatus) and EXTRA-ARTICULAR (p...
Answer the questions to see explanations
Click T (True) or F (False) for each option