What is the PLC?
The posterolateral corner is a group of structures that resist varus and external rotational forces. Injury can be isolated or part of a multiligament knee injury.
Assessment
Examination includes varus stress, rotational testing, cruciate ligament assessment and evaluation of the common peroneal nerve, supported by appropriate imaging.
Treatment
Low-grade isolated injuries may be treated non-operatively. High-grade injuries with objective instability often require evaluation for anatomical repair or reconstruction.
Why early recognition matters
Unrecognized PLC instability may overload an ACL or PCL reconstruction and contribute to persistent instability.
Rehabilitation
After reconstruction, weight bearing and range of motion are progressed carefully to protect the grafts while strength and function are restored.
Frequently Asked Questions
Are LCL and PLC the same?
The LCL is one key component of the lateral stabilizing complex; the PLC includes several additional structures controlling varus and rotation.
Can these injuries be repaired instead of reconstructed?
That depends on timing, tear pattern and tissue quality. Selected acute injuries can be repairable, whereas chronic instability commonly requires reconstruction.
Individualized Care
Treatment recommendations depend on symptoms, examination, imaging, activity demands and patient goals rather than any single test result.