TG is one of the building blocks of the thyroid hormones. It's T4's protein precursor. Thyroid peroxidase (TPO) is the enzyme that catalyzes the synthesis of T4 by combining TG and iodine. So, without TG, you can't have T4.
TG isn't usually part of a thyroid panel for monitoring hypo/hyper. Some thyroid cancers cause TG to be elevated. After surgery and/or RAI, TG will go down, ideally to zero. It's then monitored, since if it goes back up again, recurrence is indicated. This is not the case with you, so I'm having trouble figuring out why it was ordered. I can't find any references to testing it in people who still have a thyroid.
I'm just confused...don't know why they ordered it and don't know why it should be zero (although that is part of the reference range). Apparently, they didn't think the result was significant.
I left a message with them today asking which blood test showed inflammation and wanted to make sure I got all my blood work, they are very unorganized and slow in their office.
My thyroglobulin said 0 reference range- 0-55
I don't see anything there to indicate inflammation. Typically, when TGab or TPOab is elevated, we assume inflammation because the cause is autoimmune and the antibodies cause inflammation.
Was thyroglobulin really zero, or is that line a typo? What's the reference range on that?
If you're in the States, your doctor has to provide you a copy of your lab report upon request. He can charge you for the copy, however.
He got the inflammation from blood test not ultra sound. I guess he could have done another blood test, I have had a very difficult time getting my results from them.
Your FT4 is at 15% of range, which is way low of the 50% rule of thumb. FT3 is 37%, which is also low of the upper half (50+%) to upper third (67+%) rule for FT3.
However, your TSH is very "normal", and a lot of doctors really don't get beyond TSH...they order the other tests, but I doubt they look at them much. TSH is a pituitary hormone and a very indirect measure of thyroid status. Any number of factors can influence it.
The diagnosis of "inflammation" was made on these blood tests or the ultrasound? Both antibodies are negative, and your U/S found nothing, so it doesn't look autoimmune. I see nothing in the blood work that indicates inflammation. Do you suppose the doctor ran other tests, too?
You might have to pursue this with a more enlightened doctor.