Re: MRI reading 8 weeks post op
My guess is that you are still having pain that you had not expected at 8 weeks post-surgery. I can give you a general idea of the report, but as always, a MRI is one piece of the puzzle which needs to be correlated with the surgeon's physical exam, a basic neurologic exam and your report of your current symptoms to be meaningful. Sometimes we read the words on the radiology report and tend to think the worst without really understanding the full picture.
That being said, granulation tissue is a collagen rich tissue that fills in after surgery. In some cases it is pretty much the same as what is often referred to as scar tissue. However, it can also just be tissue that forms as the surgical site heals.
It looks like there is additional tissue that is enhancing the S1 nerve and also taking up space in the foramen at this segment. The report indicates that this "tissue" could be the granulation tissue or it could be disc material that is being expressed from the disc (as you state, perhaps it has ruptured or reherniated).
It may be that you still have quite a bit of inflammation from surgery and that is accounting for this enhancement. If that is the case, your surgeon may try a round of prednisone or a steroid, or perhaps want you to have an ESI to see if it will move the tissue off the nerve and out of the foramen.
You just have a couple more days to wait until you get the details from your surgeon. Please let us know how you are doing.