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Synovial Cyst of the Spine

A facet synovial cyst can develop in a number of different ways. As the facet joint of the vertebrae begins to degenerate over time or as a result of injury or some form of trauma, it produces excess fluid, much more so than that of a healthy joint. This excess fluid provides extra lubrication to the joint, assisting it in its movements. However, this excess fluid will eventually build up and become trapped within the synovial lining of the joint – forming a cyst.
The cyst only becomes an issue once it grows large enough to begin putting excess pressure on the nerves. Patients should be aware of any pain, numbness or tingling in their legs, or worsening low back pain.