Lateral Cartilage Meniscus Injury

What is a Cartilage Meniscus?

There are 2 cartilage menisci in each knee joint. These are crescent shaped and sit on the inner and outer edges of the uppermost surface of the shin bone. These menisci perform an essential function in the knee, acting as shock absorbers for the knee as well as allowing for the proper interaction and weight distribution between the tibia and the femur (thigh bone). The importance of the menisci to the knee function mean that damage can cause serious knee instability.

How is the lateral meniscus injured?

The lateral meniscus is less commonly injured than the medial meniscus as it has less attachment points to other structures. For example the medial meniscus is attached to the medial ligament. The lateral meniscus may be injured in twisting movements or through a direct impact to the knee. Degeneration of the cartilage is also common in older people.

What are the symptoms of an injury of the lateral meniscus?

• A history of trauma or twisting of the knee
• The outer surface of the knee joint may be painful
• Once injured there will be swelling within 2 days
• Pain or clicking in the knee and an inability to fully bend the knee.
• A positive sign (pain and/or clicking noise) during a "McMurrays test"
• The knee may 'lock'
• Inability to weight bear on the affected side

What are the types of meniscal injuries?

• Degenerative Changes: This may lead to edges of the menisci becoming frayed and jagged
• Longitudinal Tears: This is a tear that occurs along the length of the meniscus
• Bucket- Handle Tears: This is an exaggerated form of a longitudinal tear where a portion of the meniscus becomes detached from the tibia forming a flap that looks like a bucket handle
  

Useful Products:

• Cold Therapy - apply ice or cold therapy to the site of injury to ease pain.
• Knee Braces - help to support and protect the knee, reducing the risk of further injury.

Please see the Virtual Sports Injury Clinic for more information on how to treat Lateral Cartilage Meniscus Injury and other knee injuries