Thanks for the response. I had a follow up CT scan after the Radioiodine uptake scan that was clear as well. I have personally decided to monitor the trends in labwork TG levels every few months, and go from there. They can't really treat something they can't visualize.
It does make me a bit unsettled that "good" or "bad" cells could be microscopic or traveled elsewhere and are not able to be picked up yet, plus, when I think of traveling cells, I think of bad cells being more likely to travel as opposed to healthy ones. When I think of cancer metastisis, it just makes more sense that the bad cells would take up residence elsewhere.
I would say decide what you feel comfortable with, and discuss it further with your Dr. I know that taking a wait and see approach is a difficult task, but why expose yourself to more radiation with further imaging?
just my opinion...I was diagnosed last March with papillary.