The uptake scan can imply Graves' - the only way to confirm it is with that TSI blood test. There are other thyroid conditions that can cause elevated uptake.
If you read some of the other threads on here, you will discover that mismanagement of thyroid disease is rampant. It doesn't matter if the person is dealing with Graves' or Hashi's (the most common cause of hypothyroidism).
If you took a peek at my signature, you noted that I started my thyroid disease journey with Graves'. I joined the 20% of Graves' patients that go hypo after remission. The hypothyroidism can be temporary but, just like the hyperthyroidism I first had, the hypothyroidism needs to be treated.
I saw 3 clueless endos when I was on anti-thyroid drugs (methimazole) and my GP proved clueless as well. I didn't find a thyroid-savvy doctor until one month after I unknowingly entered remission.
Mismanagement happens because doctors erroneously look at TSH (a pituitary hormone) when they should be looking at the actual thyroid hormone levels (FreeT4 and FreeT3) to judge thyroid status.
In addition, many doctors don't understand the autoimmune component of thyroid disease so they don't run the right tests.
It's a sad state of reality - the personal stories sticky thread covers some of it.....the petition we were talking about on here last week shows that it's a worldwide problem.
But, all is not doom and gloom - there ARE thyroid-savvy doctors out there but, you need to know how to recognize one.
Patients who achieve wellness work towards understanding their disease and are proactive with their care.
We can help you along the way.