Your meniscus is a c-shaped fibrocartilage which absorbs and disperses pressure that travels through the knee. The most common cause of tearing the meniscus is excessive pressure and twisting forces applied to the knee. This usually occurs, often as an unrecognized event, during a twisting or hyperflexion of the knee.
X-Rays can rule out any loss of articular cartilage and diagnosis by a qualified physician is recommended. Also, MRIs are often very helpful in visualizing the suspected tear, although these scans sometimes miss the injury. An MRI cannot rule out a meniscus tear in a patient without articular cartilage loss and in whom classic meniscal symptoms persist.
Symptoms often include swelling and pain localized at the lateral or medial aspect of the knee. Mechanical symptoms of catching, popping, or even locking may occur. Symptoms are typically aggravated by vigorous activities and squatting. Discomfort is often noted at night and descending stairs.
Avoidance of loading and twisting the knee in a deep flexed position.