Posteromedial Corner

Description

Axial plane illustration of the knee at the level of the menisci demonstrates the components of the posteromedial corner[ref]Image courtesy of radsource.us</ref>

Illustration of the posteromedial aspect of the right knee demonstrating the three arms of the posterior oblique ligament. MGT = medial gastrocnemius tendon, OPL = oblique popliteal ligament, SM = semimembranosus muscle, sMCL = superficial medial collateral ligament

Name

• Posteromedial Corner (PMC)

General

• Comprised of structures of the posterior border of the superficial MCL and the medial border of the PCL
• Has historically been ignored for the oft-injured posterolateral corner with subsequent dearth of literature

Anatomic Components

• Posterior Oblique Ligament
• Semimembranosus Tendon
• Oblique Popliteal Ligament
• Posterior horn of the medial meniscus
• Posteromedial Joint Capsule of the Knee
• Head of the medial gastrocnemius

Function

• Medial knee stability

Clinical Significance

• When injured, do not tend to heal without surgery
• Can lead to instability of the knee, chronic pain

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Clinical Significance

• Posteromedial Corner Injury

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See Also

• Knee Pain (Main)
• Knee Anatomy (Main)
• Physical Exam Knee

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