Did you find a doc to take the cyst seriously?

If you are having symptoms that match locationally with the nerve map for c6-c7 then it's likely not incidental. Unfortunately, doctors and radiologists have been classically trained to ignore Tarlov cysts.

Tarlov cysts are dialations of the sheath at the base of the nerve root as it leaves the spine and more importantly, they are innervated. Dr. Feigenbaum told me size generally doesn't matter, it's the symptoms. He's had people with small cysts come in with significant symptoms.