Knee meniscus disorders involve the medial meniscus or lateral meniscus, two semicircular pads of cartilage in the knee between the joint surfaces (femoral and tibial condyles) of the upper leg bone (femur) and lower leg bone (tibia). Menisci serve as shock absorbers. The most common meniscus disorder is a tear. The most common location for a meniscus tear in the knee is the posterior horn of the medial meniscus.
