Re: Hyperthyroidism and lab results interpretation?
Since your thyroid hormone levels (FreeT4/FreeT3) are in-range yet your TSH is below range, you would be considered to have subclinical hyperthyroidism.
Your other bloodwork is consistent with someone that has subclinical hyperthyroidism.
You wouldn't want to take any anti-thyroid drugs because they would lower the thyroid hormone levels down a LOT and cause you to have hypothyroid symptoms (and levels)
In your case, most knowledgable doctors would Rx a beta-blocker such as propranolol....it will help ease symptoms and can actually cause the FreeT3 level to drop down a bit.
The FreeT3 level is most often responsible for symptoms so, with yours being high in the range, lowering it down a bit should help.
Your FreeT4 level is in a very good place - in fact, many people would need it to be a little higher.
There is absolutely no need to have the I-131 scan done - it is really an obsolete test and the same information can be obtained from bloodwork and a thyroid ultrasound.
Better to have a TSI blood test (thyroid stimulating immunoglobulin) to confirm or rule out Graves'....and the ultrasound to check thyroid condition, including possible presence of nodules (which could then have a FNA biopsy if suspicious)
Just so you know, the Anti-TPOab test does not confirm Graves' - it is a marker of thyroid inflammation and most people with autoimmune thyroid disease will have elevated levels. I have Graves' disease and never had positive results until most recently....and that can happen to anyone of advancing age (ugh - lol)
Dx'd Graves' June 2007..used ATD's, achieved remission Nov '09....went hypo Mar '10