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Graves Disease After Radioactive Iodine
What is the significance of radioactive iodine scan in various throid diseases like myxedema, hashimoto's thyroiditis and graves disease?
Hot vs. cold nodule: Iodine uptake by thyroid tissue depends on functioning cells. The most common use for thyroid scan is to assess if a nodule is functional or not. A functional/hot nodule may cause hyperthyroidism but is not likely to be malignant. See this site for more info. http://www.nlm.nih.gov/medlineplus/ency/article/003829.htm. ...Read more
Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability. Because the nucleus experiences the intense conflict between the two strongest forces in nature, it should not be surprising that there are many nuclear isotopes which are unstable and emit some kind of radiation. The most common types of radiation are called alpha, ...Read more
Have graves disease with graves ophthalmology(bulging eyes).Need to stop thyroid. Which is better radioactive iodine or surgical removal?
Depends: Depends on specific thyroid condition.Get a more detailed answer ›
It will not: An i131 test does not "diagnose" goiter. Goiter is just a term meaning an enlarged and/or nodular thyroid. An i131 scan is a "fucntional" scan. It is used to determine if a nodule within the thyroid is "hot" - picks up a lot of iodine: hyper-metabolic. A "cold" nodule does not concentrate the iodine: hypometabolic. There is a lower risk of thyroid cancer in "hot" nodules. ...Read moreSee 1 more doctor answer
Can an underactive thyriod become overactive after being burnt out with radioactive iodine 12 years earlier?
Yes, but uncommon: Some patients with graves' disease, and others with overactive thyroid nodules will undergo radioactive i-131 therapy to control thyroid levels. Usually, the thyroid hormone levels go low as the near-entire thyroid gland is destroyed. In a minority of cases, the underlying autoimmune stimulation of graves' will cause a small remnant to slowly grow back, and eventually cause overactivity again. ...Read moreSee 1 more doctor answer
Used as treatment: Your thyroid gland uses iodine to produce thyroid hormone. If you have an over-active thyroid gland, one option is to remove/destroy part of the gland. if radioacive iodine is given, the gland will take it up and will be damaged by the radiation, thus reducing the amount of hormone produced. after this occurs, some patients then have too little thyroid and need to take thyroid pills. ...Read more
To ablate remnant tissue after complete thyroidectomy(initially had multiple noduls, 1-ca node), what maximum dose of radioactive iodine be taken?
Depends: The dose is related to the risk of recurrent disease. The larger the primary tumor, the higher the risk. In your age group (under 45 yo) the risk is relatively low, even with having a positive lymph node. The recommended dose would be as low as 30 mci or as high as 100. ...Read more
Yes: Iodine deficiency will cause hypothyroidism and enlargement (goiter) of the thyroid. Do not take more than about 1000 mcg of iodine because high doses can cause problems if you have hashimoto's thyroiditis. Also, 2 recents reports from china and japan have suggested that high doses of iodine may increase the risk of thyroid cancer. Too much of a good thing is then not good. ...Read more
How do doctors know if thyroid cells(cancerous and non) take up the radioactive iodine after rai treatment for papillary thyroid cancer?
Thyroid Levels: Hashimoto's and and graves' disease are both caused by autoimmunity (where antibodies attack one's own proteins). Hashimoto's more often results in low thyroid hormone levels. Where graves' disease almost always results in high thyroid hormone levels. ...Read moreSee 1 more doctor answer
After radioactive iodine treatment is it common to need an increase in Synthroid (thyroxine) dose after all remaining thyroid tissue has been abblated?
Is radioactive iodine a fairly safe treatment after total thyroidectomy for thyroid cancer? I'm 42 years old.
Radioactive iodine: It is safe and effective. It has been used millions of times and the side effects are low. It is being used more judiciously recently based on 2015 ATA guidelines. Low risk cancers don't usually need RAI. Intermediate risk can benefit from a low dose to ablate the thyroid remnant. High risk benefit from conventional RAI 70-100+ mCi. ...Read moreSee 2 more doctor answers
Depends on dose: For graves disease, typical doses of rai are 5-25 mci. The dose depends on your uptake and size of gland. Some doctors give low doses to try to make your thyroid normal. But this usually does not work. Either the low dose leaves you still hyperthyroid, or it makes you hypo, just like a higher dose. For this reason, many just give a high-ish dose so you become hypo quickly and go on synthroid (thyroxine). ...Read more
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