It is an important part of the endocrine, or hormonal, system. It regulates metabolism by releasing hormones into the bloodstream.
The more hormones it releases, the more quickly metabolism runs. Normally, a chemical called thyroid-stimulating hormone TSH produced in a part of the brain called the pituitary, tells the thyroid how much or how little to produce. Thyroid-stimulating hormone TSH stimulates the thyroid gland to release thyroxine T4 and triiodothyronine T3 ; a doctor may take a blood sample to measure levels of these hormones.
The patient consumes a small quantity of radioactive iodine by liquid or capsule. Once swallowed, the iodine collects in the thyroid. The doctor will then perform several scans using a radioactive tracer. The first is usually done hours after the iodine has been taken. Following this, a second scan is usually taken 24 hours later. Iodine is found in seaweeds, such as kelp and dulse. The NIDDK also advises people to speak to their doctor before taking a multivitamin supplement or using cough medicine, as these can contain iodine.
It is important to attend all scheduled health appointments, however, because treatment for an overactive thyroid can trigger an underactive thyroid, or hypothyroidism. Symptoms include a lack of mental and physical energy, weight gain, and depression. Hyperthyroidism in men can cause complications like erectile dysfunction and low testosterone. However, treatment is available and will likely restore…. Health Conditions Discover Plan Connect. Multiple Sclerosis. Medically reviewed by Marina Basina, M.
The bottom line. Read this next. Medically reviewed by Judith Marcin, M. Hyperthyroidism Diet. Medically reviewed by Elaine K. This results in an overactive thyroid hyperthyroidism.
The diagnosis of hyperthyroidism is made on the basis of your symptoms and findings during a physical exam and it is confirmed by laboratory tests that measure the amount of thyroid hormones thyroxine, or T4, and triiodothyronine, or T3 and thyroid-stimulating hormone TSH in your blood see the Hyperthyroidism brochure. The choice of initial diagnostic testing depends on cost, availability and local expertise. Also, in some patients, measurement of thyroidal blood flow with ultrasonography may be useful to establish the diagnosis if the above tests are not readily available.
The treatment of hyperthyroidism is described in detail in the Hyperthyroidism brochure. All hyperthyroid patients should be initially treated with beta-blockers. Antithyroid medications are typically preferred in patients who have a high likelihood of remission women, mild disease, small goiters, negative or low titer of antibodies.
If methimazole is chosen, it can be continued for months and then discontinued if TSH and TRAb levels are normal at that time. If TRAb levels remain elevated, the chances of remission are much lower and prolonging treatment with antithyroid drugs is safe and may increase chances of remission. Advertising revenue supports our not-for-profit mission.
This content does not have an English version. This content does not have an Arabic version. Overview Thyroid gland Open pop-up dialog box Close.
Thyroid gland Your thyroid gland is located at the base of your neck, just below the Adam's apple. Enlarged thyroid Open pop-up dialog box Close. Enlarged thyroid Widespread enlargement of the thyroid can expand the gland well beyond its typical size left and cause a noticeable bulge in the neck right. Graves' ophthalmopathy Open pop-up dialog box Close. Graves' ophthalmopathy Graves' ophthalmopathy signs and symptoms include bulging eyes, redness and retracting eyelids. Graves' dermopathy Open pop-up dialog box Close.
Graves' dermopathy Rarely, people who have Graves' disease develop a reddish thickening of the skin that resembles the texture of an orange peel Graves' dermopathy. Request an Appointment at Mayo Clinic. Share on: Facebook Twitter. Show references AskMayoExpert. Mayo Clinic; Graves' disease.
Accessed April 9, Jameson JL, et al. In: Harrison's Principles of Internal Medicine. The McGraw-Hill Companies;
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