Hypermobile Meniscus: Difference between revisions
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== Clinically Relevant Anatomy<br> == | == Clinically Relevant Anatomy<br> == | ||
Lateral meniscus hypermobility is excess motion at the lateral meniscus that can cause lateral knee pain or tenderness, locking of the knee, or limitation of the range of motion during knee flexion. It is a rare, uncommon condition. | |||
The lateral meniscus is a C-shaped cartilaginous disc that sits on the convex, lateral tibial plateau. In a stable knee, the lateral meniscus is smaller, thinner, and more mobile than the medial meniscus. The menisci have various functions – load transmission, shock absorption, joint lubrication, nutrition, secondary mechanical stability, and guiding of movements. | |||
Compared to the medial meniscus, the lateral meniscus has less stabilizers at its posterolateral aspect. The stabilizers of the lateral meniscus include the – popliteomeniscal fascicles (PMF), the posterior capsule, the meniscofemoral ligaments and the posterior meniscotibial ligament that are divided by popliteus tendon as it runs through the popliteal hiatus. These attachments to the posterior knee prevent the subluxation of the posterior horn of the lateral meniscus into the knee joint. | |||
== Mechanism of Injury / Pathological Process<br> == | == Mechanism of Injury / Pathological Process<br> == | ||
It is thought to be related to a congenital deficiency in the capsular attachments, or an atraumatic injury to the ligamentous attachments, specifically the PMF. Studies have found that many cases with anterior cruciate ligament (ACL), and/or posterolateral injuries to the knee have concurrent damage to the PMF which results in lateral meniscus hypermobility. | |||
== Clinical Presentation == | == Clinical Presentation == | ||
Revision as of 01:32, 21 March 2023
Top Contributors - Robert Pierce, Madisyn Melchor, Kim Jackson, Matt Huey, Cindy John-Chu and Briana Marin
Clinically Relevant Anatomy
[edit | edit source]
Lateral meniscus hypermobility is excess motion at the lateral meniscus that can cause lateral knee pain or tenderness, locking of the knee, or limitation of the range of motion during knee flexion. It is a rare, uncommon condition.
The lateral meniscus is a C-shaped cartilaginous disc that sits on the convex, lateral tibial plateau. In a stable knee, the lateral meniscus is smaller, thinner, and more mobile than the medial meniscus. The menisci have various functions – load transmission, shock absorption, joint lubrication, nutrition, secondary mechanical stability, and guiding of movements.
Compared to the medial meniscus, the lateral meniscus has less stabilizers at its posterolateral aspect. The stabilizers of the lateral meniscus include the – popliteomeniscal fascicles (PMF), the posterior capsule, the meniscofemoral ligaments and the posterior meniscotibial ligament that are divided by popliteus tendon as it runs through the popliteal hiatus. These attachments to the posterior knee prevent the subluxation of the posterior horn of the lateral meniscus into the knee joint.
Mechanism of Injury / Pathological Process
[edit | edit source]
It is thought to be related to a congenital deficiency in the capsular attachments, or an atraumatic injury to the ligamentous attachments, specifically the PMF. Studies have found that many cases with anterior cruciate ligament (ACL), and/or posterolateral injuries to the knee have concurrent damage to the PMF which results in lateral meniscus hypermobility.
Clinical Presentation[edit | edit source]
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Diagnostic Procedures[edit | edit source]
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Outcome Measures[edit | edit source]
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Management / Interventions
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Differential Diagnosis
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Resources
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