Meniscus injuries, also referred to as meniscal tears, manifest when the cartilage from the knee is torn. If your damage is severe, the torn portion can transfer out of spot, locking the knee. These crescent-shaped parts of cartilage work as wedges among the thighbone and shinbone, offering balance and cushioning. https://www.theorthopaedicandpainpractice.com/what-is-a-meniscal-injury/