A few years ago (in 2014/early 2015) my doctor ran some tests that showed measurable TSI and positive Tg and TPO.
Thyroglobulin Ab: 83.9 IU/mL (<19.0) H (April 2014)
Thyroid peroxide ab: 781iu/ml (<5) H (September 2014)
TSI: 44% (<140) (August 2014)
TSH: 2.6 (.35-4.9) (March 2015)...
I had a partial thyroidectomy on 1/8 to remove a 2.7cm nodule. A second nodule was found and both turned out to be the follicular variant of papillary cancer. I had the completion surgery on 2/26. Twelve days later my thyroglobulin level was 8 while on 25mg of Cytomel, 1/2 a pill twice per day...