Doctor insights on:
Goitrogens And Thyroid Function
Very common problem: Thyroid nodules are very common. We do not know why they appear. They normally do not cause functional changes in the thyroid. Once they are found, thyroid labs are done and ultrasound is used to evaluate. Those over 1 cm often get biopsied with fine needle aspiration biopsy. Luckily, about 95% of nodules are benign. ...Read more
Iodine supplements usually aren't necessary if you live in the United States or in most developed countries: Some alternative medicine practitioners recommend iodine tablets or kelp supplements — which are high in iodine — for people with hypothyroidism. It is true that iodine deficiency can cause hypothyroidism. But iodine deficiency is rare in the United States and other developed countries since the addition of iodine to salt (iodized salt) and other foods. If iodine deficiency isn't the cause of hypothyroidism, then iodine supplements provide no benefit and should not be used. In fact, for some people with abnormal thyroid glands, too much iodine can cause or worsen hypothyroidism. Hypothyroidism can be safely and effectively treated with the synthetic thyroid hormone levothyroxine (Synthroid, Levothroid, others). ...Read more
Clarify: I'm not sure what your question is. Testosterone should be used with caution in patients with conditions involving edema, such as impaired kidney function, as the hormone may worsen edema. One of the adverse effects of testosterone is an increase in serum creatinine concentration. ...Read more
Will thyroid hormones or antithyroid medications interfere with a tc99m pertechnetate thyroid scan?
Not usually: Technetium is usually trapped by thyroid gland and used to determine in young children and infants the configuration of thyroid gland, hypoplasia, absence, or increased size or hyperplasia, or abnormal location. Radioactive iodine is used in older patients for determine function of thyroid gland, increased function or hyperthyroiidism or decreased function, hypothyroidism. ...Read moreSee 2 more doctor answers
Hashimoto: Sometimes medication is needed and sometimes not. Make sure you see an Endocrinologist! ...Read more
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
See details: You misunderstand the disease and the lab tests. If your thyroid function is low, then your TSH level would be elevated. To correct a hypoactive thyroid, you need to take thyroid replacement medication. ...Read more
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
Taking ptu (propylthiouracil) for overactive thyroid and Clomid also; does smoking affect thyroid hormones?
Eye disease: Smoking will greatly increase your risk for developing grave's exophthalmopathy. Essentially, the eyes are pushed out because of immune deposits behind them. This will make it difficult for you to close your eyes. People go blind from this depending on severity. We don't understand why smoking increases your risk but it does. ...Read moreSee 1 more doctor answer
All of them.: While the inflammation (the -itis part of thyroiditis) affects only the thyroid, if this causes the thyroid levels to drop, every tissue in the body can be affected - simplistically this can cause a slow down of the heart, the GI tract, the liver, the muscles, and the brain. Because the cells are slower to convert food energy to heat or work energy there is less energy to get things done. ...Read moreSee 1 more doctor answer
Lithium checks: 44F of unknown ethnicity with Hx depression but no Hx of taking lithium asks: how often should Li renal fx thyroid etc be checked. ANS: unless taking lithium never, others depends o medical history. Your personal physician is the best to answer these questions as I do not have enough details. ...Read more
No: Thyroid cancer is fairly common, the most common endocrine malignancy, and therefore, it can be seen in the setting of thyroid dysfunction (most commonly, hashimoto thyroiditis), but thyroid dysfunction has never been shown, to my knowledge, to cause thyroid cancer. ...Read moreSee 1 more doctor answer
Potentially: Hi. By lowering endogenous estrogen, letrozole may lead to a slight decrease in TBG. Unless you are taking l-thyroxine for hypothyroidism, it won't matter, however, because your pituitary will adjust thyroid hormone production to keep it normal. What condition are you taking letrozole for? Good luck! ...Read more
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