Description

A meniscus (plural: menisci) is a piece of cartilage in a joint that provides cushion where two bones meet. In the knee, two C-shaped menisci protect the area between the upper and lower leg bones. What is a meniscus? The meniscus is a crescent-shaped shock absorber in the knee that sits between the femur (thighbone) and tibia (shinbone). Each knee has two menisci. One is on the medial side, closest to the other knee, and the other is on the lateral side, closest to the outside of the leg. During activities on your feet, the meniscus cartilage cushions the amount of wear and tear on the surrounding articular cartilage, which is the protective layer on the ends of the bones. Types of Meniscus Injuries Injury or damage to the meniscus can result from abruptly twisting or rotating the knee; strain during squatting, bending or lifting heavy objects; and hard impacts from a tackle or other sports activity. Injuries can range from a meniscus strain to a partial or full meniscus tear. The treatment for meniscus injury symptoms varies on the degree of injury, and can be as conservative as rest and icing up to more drastic interventions like surgery. Our Sports Medicine team will work with you to determine the best course of treatment. What Is a Meniscus Tear? A torn meniscus is a common injury wherein the cartilage that makes up the meniscus cushion is damaged and the integrity of the surface is disrupted. Like with most meniscus injuries, a meniscus can tear during sports activities like running and quickly pivoting. In older adults, degeneration of the cartilage in the knee, also known as osteoarthritis, can weaken the meniscus so that it tears, even if there is little athletic activity or strain. or a degenerative condition. Like a crack in ice, a meniscus tear in a knee can run in many different directions. With some severe tears, a portion of the meniscus can detach or break off from the meniscus. How to Tell a Meniscus Sprain vs. Tear The signs of a meniscus sprain are similar to a meniscus tear. Both can include knee pain, swelling and stiffness. Being unable to move your knee and hearing popping sounds can indicate a more severe injury. The more intense your symptoms, the more likely your injury is a tear and not a sprain. Our doctors will conduct a physical examination and may recommend X-rays or MRI to diagnose your injury. What Causes a Meniscus Tear? The meniscus can tear suddenly with acute trauma, or wear down gradually and tear over time. Seen often during athletic activity wherein the knee gets twisted with the foot planted, such as basketball, soccer and skiing, a meniscus tear can happen with or without physical contact with other players, like a tackle or body check. A degenerative meniscus tear results from the meniscus wearing out, a condition more common in older people. Pre-existing conditions like osteoarthritis can also contribute to meniscus tears. Meniscus Injury Symptoms Pain in the knee, especially during physical activity, is often the first symptom of a meniscus injury. Symptoms generally worsen with additional strain and weight-bearing activity and may include: Pain in one or both sides of the knee The sensation of the knee catching or locking during movement Swelling Stiffness Feeling or hearing a pop with a sudden onset of pain A loss of range of motion in the knee Weakness in the knee during activity Symptoms of a Meniscus Tear Signs of a torn meniscus can include pain and difficulty twisting or moving laterally. In the event of meniscus tears, the patient is more likely to have a decreased range of motion and increased weakness and pain during activity. Symptoms of a Meniscus Sprain A meniscus sprain can still be painful and bring about swelling and stiffness. However, a strain won't limit the range of motion as much as a tear and doesn't commonly result in the knee catching or locking. Meniscus Injury Diagnosis Diagnosis of meniscus injuries is largely based on a physical examination by one of our providers that takes your medical history into account. We may also employ imaging, such as standing x-ray or MRI, to aid in diagnosis. Meniscus Injury Treatment Our providers will work with you to customize a treatment plan based on your recovery goals, the extent of your injury, symptoms, age and activity level. Strains and minor tears may not need surgery, while more severe tears may require surgical repair. Learn how Mass General Brigham Sports Medicine specialists diagnose and treat a full spectrum of knee conditions, including knee cartilage injuries such as meniscus and meniscus root tears. Nonsurgical Treatment Nonsurgical treatment of meniscus injuries is common and includes: Acitivity modifications Weight loss Ice Medications Physical therapy/home exercise Bracing Surgical Treatment There are three surgical treatments for meniscus tears - trimming the meniscus, repairing the meniscus and putting in a new meniscus. Meniscectomy (Meniscus Trimming): The most common meniscus surgery, accounting for about of 90% of all meniscus surgeries, trims back the torn portion of the meniscus to leave behind as much of the fully functioning meniscus as possible. These surgeries can generally be performed on an outpatient basis, meaning that patients generally return home the same day as surgery. Physical therapy and home exercises are common for the first month after surgery. You may use a crutch for a couple of days following surgery, and can typically return to full activity in 4-6 weeks. Meniscus repair: Meniscus repairs are typically performed for certain patterns of tears and in certain locations. Your doctor will discuss with you the success rates and potential complications of meniscus repair. This procedure is most common in younger patients, and often performed during concomitant surgical procedures such as ligament reconstruction (ACL, PCL, etc). Meniscus transplant: Meniscus transplant is often chosen for patients who have had a meniscus trimmed in the past and may have continued issues due to a lack of the meniscus, even though the surfaces on the ends of the bones are still well-preserved. This is not common, and the recommendation for this will be determined by your healthcare provider. How to Prevent Meniscus Tears Most meniscus tears occur during an acute injury, like a slip, fall or athletic strain or overextension. Acute injuries are tough to prevent, but proper knee care can help decrease the chances of injury. Strengthen the muscles in your leg to provide better support to your knee Warm up properly before activity Don't overfatigue leg muscles, which places more strain on your knee Ease into new activities and gradually increase activity intensity Wear appropriate footwear when exercising to avoid slipping and/or twisting the knee (cleats where appropriate)

Key Specification Meniscus Injuries

Torn Meniscus

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