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Doctor insights on: Graves Disease After Radioactive Iodine

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What is the significance of radioactive iodine scan in various throid diseases like myxedema, hashimoto's thyroiditis and graves disease?

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

Radioactive (Definition)

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


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How will a radioactive iodine uptake test diagnose goiter?

How will a radioactive iodine uptake test diagnose goiter?

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 more

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Dr. James Chu Dr. Chu
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Can an underactive thyriod become overactive after being burnt out with radioactive iodine 12 years earlier?

Dr. James Chu Dr. Chu
4 doctors agreed:
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 more

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Are there natural therapies after having radioactive iodine treatment for graves disease?

Are there natural therapies after having radioactive iodine treatment for graves disease?

No: If you become hypothyroid after rai you need to take thyroid hormone to replace your bod's thyroid hormone. ...Read more

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Advice about radioactive iodine for a overactive thyroid?

Advice about radioactive iodine for a overactive thyroid?

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

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I have low iodine diet before radio iodine treatment for thyroid cancers?

I have low iodine diet before radio iodine treatment for thyroid cancers?

Pre-treatment: You are on low iodine diet to keep normal iodine from competing with radio-iodine and interfering with the concentration of radio-iodine in the thyroid cancer. Wish you good health. ...Read more

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\question on graves disease and being treated for it with radioactive iodine/ success?

\question on graves disease and being treated for it with radioactive iodine/ success?

Graves dis,radioacti: Radioactive iodine treatment is very effective in treatment of graves disease.The thyroid gland is knocked out and patients will need thyroid replacement all their life. ...Read more

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To ablate remnant tissue after complete thyroidectomy(initially had multiple noduls, 1-ca node), what maximum dose of radioactive iodine be taken?

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

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Iodine deficiency thyroid; will taking iodine correct it?

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

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How do doctors know if thyroid cells(cancerous and non) take up the radioactive iodine after rai treatment for papillary thyroid cancer?

How do doctors know if thyroid cells(cancerous and non) take up the radioactive iodine after rai treatment for papillary thyroid cancer?

Nuclear medicine: Nuclear medicine scans will show where the radioactivity is concentrated, which is almost always in these cases in the thyroid glands and in any metastatic lesions of thyroid cancer. ...Read more

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How is hashimoto's thyroiditis different from grave's disease?

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 more

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After radioactive iodine treatment is it common to need an increase in Synthroid (thyroxine) dose after all remaining thyroid tissue has been abblated?

After radioactive iodine treatment is it common to need  an increase in Synthroid (thyroxine) dose after all remaining thyroid tissue has been abblated?

right amount: After complete ablation of thyroid tissue body needs required amount of thyroid hormone for each person , so requirement will increase due to lack of own thyroid tissue , so synthroid (thyroxine) dose need to be adjusted ( increases ). ...Read more

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Is radioactive iodine a fairly safe treatment after total thyroidectomy for thyroid cancer? I'm 42 years old.

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 more

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What percentage of radio active thyroid iodine patients lose all thyroid function?

What percentage of radio active thyroid iodine patients lose all thyroid function?

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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Can the parathyroid glands be damaged after Iodine 131 treatment following thyroidectomy?

No but: The parathyroid can be inadvertently removed, temporarily or permanently damaged during the thyroidectomy. You just need to work with your doc to determine which case pertains to you. ...Read more

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Can high free T4 detect graves disease?

Can high free T4 detect graves disease?

Not alone: An elevated free T4 is compatable with hyperthyroidism of any cause accompanied by a suppressed TSH and elevated t3 (liothyronine). ...Read more

Dr. David Geffner
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Graves' Disease (Definition)

An immune-system disorder of the butterfly-shaped gland in the throat (the thyroid) and the most common cause of hyperthyroidism (overactivity ...Read more