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Knee Joint01:23

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The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
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Overview of Meniscal Injuries.

Fadila Mihoubi1,2, Mickael Tordjman3, Wassef Khaled1,2

  • 1Department of Musculoskeletal Radiology, AP-HP Centre, Université Paris Cité, Hôpital Cochin, Paris, France.

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|May 20, 2025
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Summary
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Meniscal injuries are the most common knee injuries, often caused by trauma or degeneration. Understanding tear patterns is key for effective treatment and diagnosis.

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Area of Science:

  • Orthopedics
  • Sports Medicine
  • Anatomy

Background:

  • The menisci are vital for knee function, providing stability, load distribution, and shock absorption.
  • Meniscal injuries constitute over 60% of all knee injuries, affecting both athletes and non-athletes.
  • Tears result from combined axial loading and rotational forces, with the medial meniscus being most frequently injured.

Purpose of the Study:

  • To detail the anatomical significance of menisci in knee biomechanics.
  • To classify common meniscal tear patterns and their implications for treatment.
  • To identify potential diagnostic challenges in evaluating meniscal injuries.

Main Methods:

  • Review of anatomical and biomechanical literature on menisci.
  • Classification of meniscal tear types based on location and pattern.
  • Analysis of common causes and contributing factors to meniscal tears.
  • Identification of diagnostic pitfalls and anatomical variations.

Main Results:

  • Meniscal injuries are the leading cause of knee trauma, frequently linked to degenerative changes.
  • Tear classification includes horizontal (simple, complex, flap), vertical/longitudinal (simple, bucket-handle, ramp), and radial (simple, parrot beak, root tears).
  • Diagnostic challenges arise from anatomical variants, surrounding structures, and imaging signal variations.

Conclusions:

  • Meniscal anatomy is intrinsically linked to knee stability and shock absorption.
  • Accurate classification of meniscal tears is crucial for guiding appropriate treatment strategies.
  • Awareness of diagnostic pitfalls is essential for precise evaluation of meniscal injuries.