Thyroid UK
82,907 members97,952 posts

Lab results confusion

So originally when I went in for testing the t3, t4, and TSH were all out of range and pointing toward hyperthyroid. The doctor seemed to think it was Graves disease so they scheduled a thyroid uptake scan, and to their surprise and mine it came back normal. So I went and had more blood work done about a month later. Just got my numbers back today, it says my T4 number (1.6) and T3 number(4.2) are all in range, however my TSH number says out of range at 0.01. I am so confused by all this and I do not like my endo since he is not great at explaining things and I have literally only been able to talk to him for about 5 minutes. I feel like my symptoms are greatly improved, but every once in a while I feel like they are coming back, but then they go away and they are nowhere as bad as they had been before. I am on no medication. Can anyone help shed some light on all this? it's very confusing.

2 Replies

Clementine, it's difficult to interpret results without the lab ref ranges (the figures in brackets after your results). You've been told your T4 and T3 are within range but it's good to know where in the range they are.

It seems likely, in the absence of Graves antibodies, that your thyroid became temporarily hyperthyroid. This isn't uncommon and can happen prior to the thyroid gland failing and becoming hypothyroid. Your TSH hasn't recovered yet so it's important that FT4 and FT3 continue to be tested periodically to ensure you aren't hyperthyroid but also so you don't become hypothyroid.

1 like

Hi Clementine, Your TSH is the lowest measurement they have for it so this means you are out of range. Most of us have something like 0.16 to 1.66 when feeling well. The lower your TSH the less thyroid is requested by your pituitary to bring up levels of T4 and T3 in the body since you obviously don't need it. When you do, your TSH will go up again. Perhaps you don't have Graves but are hyper.


You may also like...