Baker’s cyst - Knee Injuries

What is a Baker’s cyst?

A Baker’s cyst is also known as popliteal cyst; it is a swelling, which is filled with liquid that develops at the back of the knee.

Effects of Baker’s cyst

The most common effects of Baker’s cysts are stiffness and discomfort during movement.

Causes of Baker’s cyst

Baker’s cyst is usually caused by a build-up of synovial fluid; this usually results from damage or injury to the knee joint, which causes the bursae (small sacs) to become inflamed and create more fluid than normal. The fluid is unable to drain and subsequently collects, forming a cyst. This condition is common in those with osteoarthritis, rheumatoid arthritis and an infected knee joint.

Symptoms of Baker’s cyst

The most obvious symptom is a lump behind the knee. Other symptoms often include pain in the knee and calf and clicking noises when the knee is moved.

Treatment for Baker’s cyst

Initially treatment will involve anti-inflammatory medication and ice to reduce swelling. If symptoms persist and the cyst is causing discomfort and persistent pain, it may need to be removed surgically; this is usually done by means of an arthroscopy.

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