What is the definition or description of: meniscus injury?

Torn knee cartilage: You don't have to be a football hero to get a torn meniscus in your knee. The menisci are the rubbery semi-circular cartilage structures that cushion your knee. They can be torn and can cause swelling, pain, catching or even locking in the knee. Large tears can sometimes be repaired, but the majority of tears are treated arthroscopically with trimming the torn portion away.

Cartilage injury: The menisci (plural of meniscus) are 2 crescent, wedge shaped pieces of cartilage that are situated between the thigh bone (femur), and the leg bone (tibia) at the knee. One can imagine what can happen to these menisci when these 2 bones "jam" and twist against each other. The menisci can tear at various shapes and places, or "shear off" the knee attachment (capsule). This is a meniscal injury.

Cushion tear: The meniscus is a half moon shaped rubbery tissue that serves as a cushion and matches the shape of the femur and tibia bone. If it tears it can be painful or lock your knee.