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2. Thyroid-stimulating hormone - Wikipedia

   en.wikipedia.org/wiki/Thyroid-stimulating_hormone

   TSH is secreted throughout life but particularly reaches high levels during the periods of rapid growth and development, as well as in response to stress. The hypothalamus, in the base of the brain, produces thyrotropin-releasing hormone (TRH). TRH stimulates the anterior pituitary gland to produce TSH.

3. 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.

4. Hyperthyroidism - Wikipedia

   en.wikipedia.org/wiki/Hyperthyroidism

   The diagnosis of hyperthyroidism is confirmed by blood tests that show a decreased thyroid-stimulating hormone (TSH) level and elevated T 4 and T 3 levels. TSH is a hormone made by the pituitary gland in the brain that tells the thyroid gland how much hormone to make. When there is too much thyroid hormone, the TSH will be low.

5. Common thyroid drug levothyroxine linked to bone mass loss - AOL

   www.aol.com/common-thyroid-drug-levothyroxine...

   Hypothyroidism is diagnosed by looking at the free thyroxine (T4) levels in people with elevated TSH levels, and comparing the ratio between them. People with high TSH and low T4 get a diagnosis ...

6. Thyroid disease - Wikipedia

   en.wikipedia.org/wiki/Thyroid_disease

   TSH levels are determined by a classic negative feedback system in which high levels of T3 and T4 suppress the production of TSH, and low levels of T3 and T4 increase the production of TSH. TSH levels are thus often used by doctors as a screening test, where the first approach is to determine whether TSH is elevated, suppressed, or normal. [25]

7. Hypothyroidism - Wikipedia

   en.wikipedia.org/wiki/Hypothyroidism

   Subclinical hypothyroidism is a biochemical diagnosis characterized by an elevated serum TSH level, but with a normal serum free thyroxine level. [ 47 ] [ 48 ] [ 49 ] The incidence of subclinical hypothyroidism is estimated to be 3-15% and a higher incidence is seen in elderly people, females and those with lower iodine levels. [ 47 ]