Spine Conditions
Synovial Cyst
A synovial cyst is a fluid-filled sac that develops along the spine. It is also known as a ganglion cyst or a juxtafacet cyst. The cyst is usually located in the lower back (lumbar spine) and may cause pain, stiffness, and weakness in the back, buttocks, and legs.
Symptoms
The symptoms of a synovial cyst can vary, depending on its size and location. Some people may not experience any symptoms at all. Common symptoms of a synovial cyst include:
- Pain in the lower back, buttocks, and legs
- Numbness or tingling in the legs
- Weakness in the legs
- Difficulty walking or standing
- Loss of bowel or bladder control (in severe cases)
Causes
The exact cause of synovial cysts is unknown. However, they are believed to develop as a result of degenerative changes in the spine. As the spinal joints wear down over time, the protective fluid that surrounds the joints may leak out and form a cyst. Risk factors for developing a synovial cyst include:
- Age: The risk of developing a synovial cyst increases with age.
- Spinal arthritis: People with spinal arthritis are more likely to develop synovial cysts.
- Previous spine surgery: People who have had spine surgery in the past may be at higher risk of developing a synovial cyst.
- Trauma: A spinal injury or trauma may increase the risk of developing a synovial cyst.
