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Medial meniscal extrusion: Detection, evaluation and clinical implications.
Nayanatara Swamy1, Vibhor Wadhwa1, Gitanjali Bajaj1
1Department of Radiology, University of Arkansas for Medical Sciences, Little Rock, AR, United States.
European Journal of Radiology
|April 25, 2018
Summary
Pathologic medial meniscal extrusion, a condition where the medial meniscus moves abnormally, can lead to excessive knee joint load transmission. Early detection and quantification are crucial for managing knee injuries and osteoarthritis.
Area of Science:
- Orthopedics
- Radiology
- Biomechanics
Background:
- The menisci are vital for knee kinematics, channeling forces and resisting stress.
- Physiologic meniscal extrusion occurs during movement, but pathologic extrusion causes excessive load transmission.
- Medial meniscal extrusion is linked to cartilage loss, osteoarthritis, and meniscal tears.
Purpose of the Study:
- To illustrate the role of meniscus kinematics in knee function.
- To detail the identification and quantification of medial meniscal extrusion.
- To discuss the implications of medial meniscal extrusion in various knee pathologies.
Main Methods:
- Review of relevant literature.
- Discussion of multimodality imaging appearances.
- Analysis of medial meniscal extrusion quantification.
Main Results:
- Medial meniscus is more susceptible to injury than the lateral meniscus.
- Pathologic meniscal extrusion increases susceptibility to knee injury and exacerbates internal derangements.
- Accurate detection and quantification are essential for clinical management.
Conclusions:
- Medial meniscal extrusion is a significant indicator of underlying knee pathology.
- Understanding meniscus kinematics and extrusion is key for diagnosing and managing knee conditions.
- Multimodality imaging aids in assessing medial meniscal extrusion and its impact on knee joint health.
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