I've had multinodular goiter for over 15 years. One large in left lobe of 2.2. cm with vascularity. TSH was 0.45. t3 and T4 normal. Raiu scan showed 6hr uptake of 24.1% and 24 hr uptake of 57.5%. It Said no focal areas of abnormal activity detected. Distribution of radionuclide is uniform and symmetric. No extra thyroidal accumulations are seen. There is no focal lesion to indicate hyper functioning nodule. Does this mean I have cold nodules? If not what does it mean?
A "hot" nodule is one that takes up more of the isotope and is producing thyroid hormone independently of the thyroid. A hot nodule is rarely cancer.
A cold nodule is one that takes up less iodine and does not produce thyroid hormones. A cold nodule can be cancer, but less than 5% of all thyroid nodules end up being cancer.
Your report states that there is "no focal areas of abnormal activity", which which indicates there's nothing suspicious or concerning, even though the nodule is relatively large. The report should have an "impression" at the bottom which would indicate what follow up, if any, is recommended. Most multinodular goiters should be rechecked annually, unless the report indicates that it should be done more often.
Are you taking a replacement thyroid hormone medication? Thyroid medication will often help shrink nodules. If you're taking replacement medication, what medication and dosage, and how long have you been taking it?
Your TSH was relatively low... what was the normal T4 level and was that Free T4 or Total T4? They aren't the same test and there's a huge difference in the information provided. If the report says, simply, T4, that means it was Total T4 and isn't as useful as Free T4. Was there, by any chance a T3 or Free T3 test done?
What, if any symptoms do you have?