Based on the symptoms that you describe, it sounds quite possible that your problem is being caused by a herniated disc pressing on your nerves. However, a herniated disc is not the only possible cause of such symptoms.
In most patients with spinal stenosis, a laminectomy is all they need for relief. However, some conditions require something additional for best results: a fusion. I do this procedure at the same time as a laminectomy. Some of your own bone is harvested from a particular area on your pelvis that can spare it safely.
The condition is not dangerous because the slippage almost never progresses once adulthood is reached. Therefore, the treatment is usually aimed towards simply relieving pain. I have had good luck treating this with braces and therapy for muscular strengthening to help restore stability to the lower spine.
What is the natural history of scoliosis? Curvatures tend to stop getting bigger once a patient is done growing. Once a girl’s had periods for two years, her curves are unlikely to progress much after that for the rest of her life. The exception to this is if the curve gets bigger than about 50 degrees.
Numbness in the hand can be caused by pinched nerves in the neck, since the nerves that supply sensation to the hands come out of the neck, and they can get pinched as they exit.
It is unfortunately not at all uncommon for me to see patients in my office who have had back surgery which either didn’t work at all, or which worked for a while and then pain returned later. It is a complicated topic, and there are several reasons why a back operation may not work.
Whether or not to undergo surgery in your situation depends mainly on your pain level. If it is so bad that your lifestyle has altered, you can’t do the things you love, and you are miserable, then surgery may be a worthwhile risk even if the odds of failure are higher than you might normally accept.