A meniscus tear is a common sports injury that can affect people of all ages.
Knee arthritis can also lead to a meniscal injury, as the degeneration of the cartilage in the knee makes the menisci more susceptible to damage.
Meniscus tears are typically categorised in six ways:
Radial tear: The most common type of meniscus injury. Radial meniscus tears are more common on the inner part of the cartilage, the medial meniscus, which is the white zone. If symptoms do not respond well to physiotherapy or rest, surgery can remove the affected cartilage.
Horizontal tear: Running from the top to the bottom of the cartilage's C shape, horizontal tears are treated differently depending on exactly where they occur. Injuries closer to the red zone are better suited to repair procedures, while larger tears and those in the white zone may require the removal of the cartilage.
Bucket-handle tear: A common meniscus injury when a crescent-shaped cut forms in the cartilage. The resulting loose part of cartilage can, in some cases, get lodged in the knee joint and prevent a full range of movement as well as cause pain.
Incomplete tear: This is damage that occurs over time through wear and tear. It may be the result of the cartilage becoming thinner and weaker rather than a sudden impact or movement. Physiotherapy, rest and medication are common treatments for this type of tear.
Oblique tear: Also known as a 'flap tear'. These tears are often characterised by a 'catching' sensation as the flap is agitated by the movement of your knee.
Complex tear: A tear that features patterns and characteristics of multiple tear types. These tears carry an extra risk of further complications and the risk of developing or worsening arthritis, so surgery is typically recommended.
Meniscus injuries can sometimes occur at the same time as other issues within the knee, such as
ACL injuries, in those who suffer high impact through the joint.