I've got the same bone and joint pains and mine started during chemo two years ago. Tamoxifen kept the pain chain going :)
I was tested for arthritis and am happy to say that is at least ONE thing I don't have.
Best wishes.
What kind of chemo did you receive? I am thinking it might be a combination of the chemo and some OA (Osteoarthritis).
I could certainly be arthritis .... I'm sure this could and probably was diagnosed in the report of your Bone Scan. It could also be a delayed result of the Chemotherapy. I wonder if by any chance you might be on Tamoxifen or another similar drug following your Chemo. If so, this could certainly be the cause. Regards ....