The meniscus is indispensable. When one lost meniscus, one create an unfavorable condition for nearby cartilage. The knee starts to degenerate, especially if there is associated ligament damage. Meniscus treatment is, therefore, not just a pain relieving procedure but also a preventive measure for arthritis. The most common associated ligament injury in meniscus injury is anterior cruciate ligament injury. This may have to be addressed as well. Otherwise the instability situation may cause repeated meniscus injury and result in failure of meniscus treatment.