Posterolateral corner injuries of the knee

Prolotherapy Knee articular cartilage repair without surgery

Ross Hauser, MD

The knee is a complex joint of many parts. The posterolateral corner (PLC) of the knee is one such complex area. However a complex area can be described simply: (postero) back (lateral) outside – the back and outer side of the knee. It can also be treated in many cases more simply than with aggressive reconstructive surgery.

Numerous research studies cite that the three major anatomical structures that have been described as the primary stabilizers of the PLC of the knee are:

Research lead by the Steadman Philippon Research Institute suggest:

Let’s note that stabilizers prevent knee instability. When stabilizer are unstable, injured, worn, knee instability ensues.


Connective tissue:

In new research for the University of Utah and University of Michigan, doctors suggest that because anterior cruciate ligament (ACL) and posterior cruciate ligament injuries rarely occur in isolation and are often associated with injuries to the secondary or supporting structures that provide stability against rotational forces. Doctors should examine the posterolateral and posteromedial corner ligaments and tendons, as well as the anterolateral ligament.


1 Kennedy NI, LaPrade CM, LaPrade RF. Surgical Management and Treatment of the Anterior Cruciate Ligament/Posterolateral Corner Injured Knee. Clin Sports Med. 2017 Jan;36(1):105-117. [Pubmed]

2 Hansford BG, Yablon CM. Multiligamentous Injury of the Knee: MRI Diagnosis and Injury Patterns. Semin Musculoskelet Radiol. 2017 Apr;21(2):63-74. doi: 10.1055/s-0037-1599208. Epub 2017 Mar 29. [Pubmed]


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