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2. TRH stimulation test - Wikipedia

   en.wikipedia.org/wiki/TRH_stimulation_test

   The TRH test involves administration of a small amount of TRH intravenously, [1] following which levels of TSH will be measured at several subsequent time points using samples of blood taken from a peripheral vein. [citation needed] The test is used in the differential diagnosis of secondary and tertiary hypothyroidism.

3. Hypothyroidism - Wikipedia

   en.wikipedia.org/wiki/Hypothyroidism

   Hypothyroidism (also called underactive thyroid, low thyroid or hypothyreosis) is a disorder of the endocrine system in which the thyroid gland does not produce enough thyroid hormones. [3] It can cause a number of symptoms, such as poor ability to tolerate cold , extreme fatigue, muscle aches , constipation , slow heart rate , depression , and ...

4. Hypothalamic–pituitary–thyroid axis - Wikipedia

   en.wikipedia.org/wiki/Hypothalamic–pituitary...

   primary hyperthyroidism: Inappropriate secretion of thyroid hormones, e.g. in case of Graves' disease. secondary hyperthyroidism: Rare condition, e.g. in case of TSH producing pituitary adenoma or partial thyroid hormone resistance. Thyrotoxicosis: Over-supply with thyroid hormones, e.g. by overdosed exogenously levothyroxine supplementation.

5. Hyperthyroidism - Wikipedia

   en.wikipedia.org/wiki/Hyperthyroidism

   A radioactive iodine uptake test and thyroid scan together characterizes or enables radiologists and doctors to determine the cause of hyperthyroidism. The uptake test uses radioactive iodine injected or taken orally on an empty stomach to measure the amount of iodine absorbed by the thyroid gland.

6. Thyroid function tests - Wikipedia

   en.wikipedia.org/wiki/Thyroid_function_tests

   Thyroid function tests (TFTs) is a collective term for blood tests used to check the function of the thyroid. [1] TFTs may be requested if a patient is thought to suffer from hyperthyroidism (overactive thyroid) or hypothyroidism (underactive thyroid), or to monitor the effectiveness of either thyroid-suppression or hormone replacement therapy.

7. Thyroid - Wikipedia

   en.wikipedia.org/wiki/Thyroid

   Thyroid disorders include hyperthyroidism, hypothyroidism, thyroid inflammation (thyroiditis), thyroid enlargement , thyroid nodules, and thyroid cancer. Hyperthyroidism is characterized by excessive secretion of thyroid hormones: the most common cause is the autoimmune disorder Graves' disease. Hypothyroidism is characterized by a deficient ...