Almost 2 years ago I had Spinal fusion on L4 and L5, a year later still in alot of pain, my Dr said my S1 had gotten much worse during my year of recovery. We were working on scheduling surgery to fuse the S1 to the L4, L5 however My neck was also giving me issues. I had been mentioning it for several years . After discussing the neck problems, he put the S1 fusion on hold and we did the C4-C7. Still in pain he did another MRI. he said the S1 was fine now and didnt need surgery. yet Im still in alot of pain. When I asked him how this was possible that the S1 recovered in 2 and 1/2 months all he said was "I don't know'. Has anyone ever heard anything like this? Now I feel I need a new doctor. if thats all I get is " I dont know"