OK, calm down. mild facet degeneration and mild facet hypertrophy are the same thing.
If you have a bad disc, you're probably going to see bilateral facet disease. Its the disc, along with the two facets that provide three point stability for that level of the spine. When one part is affected, the other two must compensate.
So this is all part of the same disease you saw 6 months ago.
What do you mean "old radiculopathy"? This implies that once you had it, and now its gone. Have you had back surgery? If not, how were the nerve roots treated to make a radiculopathy "old"?
Perhaps you mean a chronic radiculopathy? Where? Where's the stenosis that has done the nerve damage?
If the pain is coming from your facet joints, then medial branch neurotomy (done with RF ablation), will treat that pain.
However, your pain may not be originating in mild facet disease.
It sounds like your interventional doc is shot happy -- four rounds of injections and no relief. Why have any more?
I have some questions for you.
Where's your pain?
Did these symptoms and signs come on because of a traumatic injury, or is this degenerative disc disease?
Is your pain being medicated?
How bad is that scoliosis, and where is it?
Do you have any symptoms from the cyst? It is causing foraminal stenosis.
Finally, fusion should not be done to reduce pain -- in many, fusion exacerbates pain. Don't jump into surgery because you're desperate.
Aren't you receiving pain control medication? Why not?