Synovial Facet Cyst
A Synovial Cyst is very similar to a Ganglion one often sees on the the back of one’s wrist. It is a benign (non-cancerous) problem. As can be seen in the above illustration, a synovial facet cyst compresses the nerve root from above instead of from below (like the herniated disk also seen on the other side). Unlike the bulging disk, Synovial Facet Cysts do not generally resolve, and usually require surgery.