The medial meniscus is the middle band of cartilage attached to the tibia. The band goes around the knee joint in a crescent-like path and is located between the medial condyles of the shin and the femur. The medial meniscus is often injured if the knee is twisted or sprained. It is less mobile than the lateral meniscus because it is firmly attached to the tibial collateral ligament. It is displaced most by external rotation and relaxed most by internal rotation. The most common medial meniscus injury is tearing. Intense pain is expected during the first 24 hours following the injury. Symptoms of a torn medial meniscus include being unable to extend the leg, feeling best when the knee is bent, developing gradual pain after stressing the knees, and swelling in the knee region. The medial meniscus may need to be surgically repaired if the tear is above Grade 2. Common surgery types include arthroscopic repair, partial menisectomy, and total menisectomy.
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In Depth: Medial meniscus