Learn about the different types of meniscal lesions, such as tears, ruptures and cysts, and how they affect the knee joint. Find out the causes, symptoms and anatomy of the menisci, as well as the treatment options and prevention tips. Meniscus tears are not all the same. Here's what to know about the types of tears that can occur and how each is treated. A meniscus injury is a tear in one of the crescent-shaped pads of cartilage inside each knee joint. Learn about the possible causes, symptoms, and treatment. Learn about torn meniscus , a common knee injury that can affect people of all ages and activity levels. Find out how to diagnose, treat and prevent this condition with expert advice from Cleveland Clinic.