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hypothyroidism The Sign of Hertoghe or Queen Anne's sign is a thinning or loss of the outer third of the eyebrows, and is a classical sign of hypothyroidism or atopic dermatitis , [ 1 ] [ 2 ] [ 3 ] but it can also be detected in lepromatous leprosy . [ 4 ]
Typically, Free T 4 is the preferred test for hypothyroidism, [69] as Free T 3 immunoassay tests are less reliable at detecting low levels of thyroid hormone, [70] and they are more susceptible to interference. [69] Free T 4 levels will usually be lowered, but sometimes might be normal. [71]
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]
Hypothyroidism is more common in women than in men. [3] People over the age of 60 are more commonly affected. [3] Dogs are also known to develop hypothyroidism, as are cats and horses, albeit more rarely. [13] The word hypothyroidism is from Greek hypo-'reduced', thyreos 'shield', and eidos 'form', where the two latter parts refer to the ...
Iodine deficiency is the most common cause of hypothyroidism worldwide, [53] and the autoimmune disease Hashimoto's thyroiditis is the most common cause in the developed world. [54] Other causes include congenital abnormalities, diseases causing transient inflammation, surgical removal or radioablation of the thyroid, the drugs amiodarone and ...
The thyroid cancer recurrence rate is reported to range from 7% to 14%. Recurrence is usually detected within the first decade after the initial disease diagnosis. Large lymph node metastasis is considered the strongest predictor for thyroid cancer recurrence. Post-treatment surveillance for recurrent disease depends on the cancer type and staging.
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This can cause hypothyroidism by reducing the thyrotropic effects of TSH. They are found in Hashimoto's thyroiditis and Graves' disease and may be cause of fluctuation of thyroid function in the latter. During treatment of Graves' disease they may also become the predominant antibody, which can cause hypothyroidism. [2] [13]
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