One of my friends will soon find out if she needs surgery for spinal stenosis, a narrowing of her spine. Back surgery can be dangerous and often only partially alleviates the pain and immobility associated with spinal problems. I made an online search. The reputable sites recommend that patients obtain second opinions before proceeding with surgery. Here are links to valuable information:

Mayo Clinic’s spinal stenosis information: Mayo Clinic

Mayo’s section on spinal surgery: Back surgery: When is it a good idea?

New minimally invasive back surgery: Science Daily