I had 150mCi RAI on Nov 6th and had my WBS on Nov. 14. Immediately after the scan my husband and i went to see the radiation oncologist. He said there was good uptake and all involvement was in the neck area. He said i am "cancer free". That should be GREAT news, however, i am still a bit scared. I had my TT on August 28th for papillary cancer. 11 out of 20 lymph nodes were positive. I guess I am asking if the RAI killed ALL thyroid cells, how can it come back? I see so many people with reoccurrences and was wondering if there was a lot of lymph node involvement in the beginning. I am so thrilled that the WBS was clear but my husband told my kids (who are 8 and 11 and are very scared) that i have no more cancer and everything is done. How do I know that for sure???