I had two level fusion on Nov 13, 2013. Although my sciatica and numbness is virtually gone (thank god) I have a new pain at S1 Sacrum area, which is constant and the level of discomfort varies from day to day. After imaging was done 3 weeks post-op, I was informed the disc collapsed at L5S1 either immediately post-op or within days after surgery. Imaging shows that the collapsed area has gotten worse when comparing CT scans three weeks apart. Has anyone out there had this happen to them or know of anybody that this has happened to. No one seems to be able to give me any answers or possibilities for future complication(s). My surgeon said I was incredibly lucky I chose Not to have the BMP to fuse with because it can have a tendency to keep fusing outside of the realm it was meant to stay in line with. I was one lucky lady, deciding to use my own graft instead two days prior to surgery. Research is a very good thing. Anyone.....Anyone who can give me some input???????