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2. 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.

3. TRH stimulation test - Wikipedia

   en.wikipedia.org/wiki/TRH_stimulation_test

   The test is used in the differential diagnosis of secondary and tertiary hypothyroidism. First, blood is drawn and a baseline TSH level is measured. Then, TRH is administered via a vein. After 30 minutes blood is drawn again and the levels of TSH are measured and compared to the baseline. Some authors recommend additional blood sampling at 15 ...

4. Thyroid disease - Wikipedia

   en.wikipedia.org/wiki/Thyroid_disease

   Screening for thyroid disease in patients without symptoms is a debated topic although commonly practiced in the United States. [8] If dysfunction of the thyroid is suspected, laboratory tests can help support or rule out thyroid disease. Initial blood tests often include thyroid-stimulating hormone (TSH) and free thyroxine (T4). [9]

5. Hashimoto's thyroiditis - Wikipedia

   en.wikipedia.org/wiki/Hashimoto's_thyroiditis

   TSH is the preferred initial test of thyroid function as it has a higher sensitivity to changes in thyroid status than free T 4. [ 60 ] Time of day can affect the results of this test; TSH peaks early in the morning and slumps in the late afternoon to early evening, [ 61 ] with "a variation in TSH by a mean of between 0.95 mIU/mL to 2.0 mIU/mL ...

6. Thyroid - Wikipedia

   en.wikipedia.org/wiki/Thyroid

   Thyroid function tests include a battery of blood tests, including the measurement of the thyroid hormones, as well as the measurement of thyroid stimulating hormone (TSH). [84] They may reveal hyperthyroidism (high T 3 and T 4), hypothyroidism (low T 3, T 4), or subclinical hyperthyroidism (normal T 3 and T 4 with a low TSH). [84]

7. Hypothyroidism - Wikipedia

   en.wikipedia.org/wiki/Hypothyroidism

   The diagnosis can be confirmed by blood test, as the clinical impression alone may lead to overdiagnosis. [12] [84] Lymphocytic thyroiditis is associated with detectable antibodies against thyroglobulin, although they typically become undetectable in advanced disease. [84] Treatment is with thyroid hormone replacement. [12]