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Related Concept Videos

Knee Joint01:23

Knee Joint

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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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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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Structural Joints: Synovial Joints01:16

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Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
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Double-Layered Lateral Meniscus Accompanied by Meniscocapsular Separation.

Aki Fukuda1, Akinobu Nishimura2, Shigeto Nakazora1

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|June 20, 2015
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Summary

This study details a rare double-layered lateral meniscus with meniscocapsular separation. Surgical treatment involving accessory meniscus resection and repair improved patient symptoms.

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Area of Science:

  • Orthopedic Surgery
  • Knee Anatomy

Background:

  • The lateral meniscus is crucial for knee stability and function.
  • Anatomical variations of the meniscus are uncommon but can lead to pathology.
  • Meniscocapsular separation can cause significant knee pain and instability.

Purpose of the Study:

  • To report an extremely rare case of a double-layered lateral meniscus.
  • To describe the associated meniscocapsular separation.
  • To present the successful surgical management and outcomes.

Main Methods:

  • Arthroscopic examination of the knee joint.
  • Identification of a double-layered lateral meniscus with an accessory upper layer.
  • Diagnosis of meniscocapsular separation at the overlapping segment.
  • Surgical resection of the accessory meniscus and repair of the meniscocapsular separation.

Main Results:

  • The double-layered lateral meniscus was unusually mobile.
  • Meniscocapsular separation was noted in the middle segment.
  • Surgical intervention led to significant improvement in clinical symptoms.
  • Complete resolution of pain and instability was achieved post-operatively.

Conclusions:

  • Double-layered lateral meniscus with meniscocapsular separation is a rare but treatable condition.
  • Arthroscopic assessment is vital for diagnosing associated pathologies.
  • Surgical management involving resection and repair can yield excellent outcomes.
  • This case highlights the importance of recognizing and addressing rare meniscal abnormalities.