While you and I are often in agreement about treatment possibilities, and even the risk of surgery, I have to emphasize the advanced state of nerve degeneration endured by benjm. From what he reports, he is at risk of irreversible dysfunction that is threatening his ability to ambulate.
Surgery is a highly invasive mode of treatment, and is generally has consequences which are irreversible. Surgery always causes scar tissue which often exacerbates pain. Some surgical procedures are less likely to result in a positive outcome than others. The surgical option should always be thoroughly examined before consenting, however, in emergency situations surgical intervention should be performed ASAP, when there isn't time to explore all the alternatives.
All that being true, this case sounds as if the patency of the spinal cord is threatened, and the consequences of delaying treatment may be severe. It is an unfortunate and difficult situation to deal with, but Mr. Benjm must pursue the surgical option to decompress the spine, and do so quickly to avoid damage to the peripheral nerves and the cord. His doctors will have a definitive answer -- we have nothing to offer here other than conjecture -- but if his doctors recommend immediate intervention, he'd be wise to give serious consideration to these recommendations.
It is important to ask the right questions, especially, "what are the consequences of leaving things as is?" and "what kind of a recovery can I expect?" along with "what kind of a lifestyle will I be able to enjoy after surgery?"
Best wishes to you both.
Get the book "Second Opinions" by Dr. Groopman, who ended up crippled after his disc laminectomy.. I would hesitate under any circumstances to have this procedure. I was in level ten pain from disc herniation and refused cutting and now am relatively pain free, after a long period of physical rehab.
Unfortunately, you may need another surgery, depending on the level and type of instability in your spine.
If soft tissue or disc ejecta is constricting the thecal space and cord, epidural steroid injection may help, but if the cord is occluded or bone is causing the stenosis, decompression surgery might be indicated.
Severe stenosis presents a serious threat to your nervous system. Compression on nerve roots can cause permanent damage. Please follow up medically as soon as possible.