Is it possible to have hyperthyroidism and increased radioiodine uptake without any symptoms?

Hi,

Welcome to icliniq.com.

I agree that it is strange that you did not have symptoms but increased thyroid hormone levels transiently with a positive uptake scan and negative antibodies. Are you postpartum (less than a year)? The thyroid uptake scan is the best test, but it showed diffuse increased uptake. Did you get a percentage of uptake on the scan? So, I would suggest you keep a watch out for symptoms and repeat TSH (thyroid-stimulating hormone), FT4 (free thyroxine), and T3 (triiodothyronine) every two months, even if you do not notice any symptoms.

Regards.

Hi,

Welcome back to icliniq.com.

I understand the chronology of the events better.

I agree; you probably had transient thyroiditis (postpartum or post-vaccine). You would have been fine even without any medicines since you did not have any symptoms except fatigue. During the uptake scan, you were probably in the recovery phase, so the uptake was higher. Since post thyroiditis, you can have a hypothyroid phase, which unfortunately can be permanent in a small percentage. I still recommend repeating TSH and FT4 after two months and then periodically after that.

Regards.

Hi,

Welcome back to icliniq.com.

Graves is still a possibility. A thyroid uptake scan was done 45 days after your initial blood test. It would have been helpful if the uptake scan was done earlier. The fact that T3 and T4 started going down suggests that you were in the recovery phase of thyroiditis. Yes, increased thyroid uptake scan can be due to the following reasons than Graves like recovery phase after thyroiditis, pregnancy, iodine deficiency, withdrawal from antithyroid medicines like Carbimazole. I agree with the monitoring thyroid every three months and spacing out afterward as suggested by your doctor. Even if it is Graves disease, we have treatment options other than Carbimazole.

I hope this is helpful.

Thanks.