I feel fairly certain, you need the surgery. The foot drop is my first clue. I had my 6 th back surgery at age 65. I think if you are otherwise ok things will work out for you. I am sure you know this will still be painful. It doesn't get any easier with age. Trust in your doctor and if you want a second opinion get it. I have had all your problems. I seem to grow scar tissue bad and have to have some surgeries because of it. They always fuse also. Good Luck with the surgery!
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Fancylady