The most important function of the articular menisci of the knee is to transmit and even out the strain put on the knee joint especially in association with a more intensive exertion, such as running or jumping. They also are important regarding the stability of the knee as well as lubrication of the joint and nourishment of the cartilage surface. Typical symptoms of a meniscal injury include pain at the joint line as well as swelling, locking and giving way of the knee. Earlier, when open surgery was applied, the whole meniscus was removed. This led to premature osteoarthritis in all patients within 10 years. Nowadays, meniscal tears are treated endoscopically, and as little as possible of the meniscal tissue is removed. The meniscus is sutured back in place whenever possible.