Synovitis of the Knee

Synovitis of the knee is when the lining of the knee joint, called the synovium, becomes inflamed, causing pain, swelling, and stiffness in the knee. This can happen for several reasons, including injury, overuse, or conditions like arthritis, infections, or gout. In some cases, it can occur after surgery or if there is a buildup of crystals in the joint. Athletes, people who put a lot of strain on their knees, or those with arthritis are more likely to get synovitis. It can also affect older people whose joints may not be as strong or healthy.

Diagnosing Synovitis of the Knee

Synovitis of the knee is diagnosed by a doctor through a physical exam, where they check for signs like swelling, tenderness, and pain in the knee. The doctor may ask about your symptoms and how the knee got hurt or if you’ve had any previous knee problems. To confirm the diagnosis, they may take an X-ray to rule out other issues, like fractures or arthritis. In some cases, the doctor may also take a sample of fluid from the knee joint with a needle to look for signs of infection or inflammation under a microscope. An MRI can also be used to get a detailed view of the joint and the soft tissues, including the synovium, that surround the knee.

Treatment of Synovitis of the Knee

Treating synovitis of the knee usually starts with reducing the swelling and pain. Doctors often recommend rest, ice, and elevating the knee to help reduce inflammation. Anti-inflammatory medications, like ibuprofen, are commonly used to manage pain and swelling. In some cases, a doctor may suggest physical therapy to strengthen the muscles around the knee and improve movement. If the inflammation is severe, a doctor might inject steroids into the knee to quickly reduce swelling. For more serious cases, draining excess fluid from the knee might be necessary. It’s also important to avoid activities that put extra strain on the knee while it heals. For effective long-term management of synovitis of the knee it is important to address the underlying cause of the synovitis. The definitive treatment may be different depending on weather the synovitis was caused by a local injury, osteoarthritis, reactive arthritis (ex. Rheumatoid arthritis), crystal arthropathy (ex. Gout), infection, or some other cause. If the synovitis causes or is associated with significant damage to the cartilage of the knee surgery such as a knee replacement may be necessary.

Edited by Stephen Pinney MD December 11th, 2024