Relationship of thyroid hormone T3 to breast cancer

[Hopeful]

I recently had my annual blood work from my onc, and asked him to include two additional tests, one for thyroid antibodies, and one for C Reactive Protein. The thyroid antibodies test came back well within normal parameters, and the CRP test (an indication of overall inflammation in the body) came back very low. So, I am relatively certain that my elevated TSH is not the result of auto immune antibodies. My TSH was between 6 & 7 (the cut off for the parameter is 5 at the lab) in 2004, prior to my bc dx. The latest test is also between 6 & 7. I went back through my test results, and found, to my surprise, that twice the TSH came back normal, albeit at the high end of the reference range, and both times occurred during the first year after dx, when I was on both Herceptin and AI tx, and following rads. I have no idea what to make of this, but I thought it was noteworthy.

Hopeful