I had X-rays made of lower back Friday. I had a previous surgery with a rod and screws in 2007, now for about a year it's been giving me a fit again. The dr said I had severe arthritis, something about 2 bones not lining up and degenerative disc disease in the tailbone area disc, I don't remember the letter and numbers of the disc he used. My question is, when the film were being looked at by the dr I saw black looking spots on the film, when he finished talking I had forgotten all about asking what the dark spots were. He didn't mention it so I suppose they were really nothing but ever since I left I have wondered about them. Some were probably nickel size down to dime size and smaller. Probably 8 or 9. What would you think?