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Subclinical hyperthyroidism is a milder form of hyperthyroidism characterized by low or undetectable serum TSH level, but with a normal serum free thyroxine level. [32] Although the evidence for doing so is not definitive, treatment of elderly persons having subclinical hyperthyroidism could reduce the number of cases of atrial fibrillation. [33]
Thyroid diseases are highly prevalent worldwide, [10] [11] [12] and treatment varies based on the disorder. Levothyroxine is the mainstay of treatment for people with hypothyroidism, [13] while people with hyperthyroidism caused by Graves' disease can be managed with iodine therapy, antithyroid medication, or surgical removal of the thyroid ...
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]
[1] [2] [3] Thyroid function test will evolve through the three phases of thyrotoxicosis, hypothyroidism, and euthyroid state. In the thyrotoxic phase, thyroid stimulating hormone (TSH) will be low with high or normal levels of thyroid hormones.
Graves' disease, also known as toxic diffuse goiter or Basedow’s disease, is an autoimmune disease that affects the thyroid. [1] It frequently results in and is the most common cause of hyperthyroidism. [5]
[10] [3] IL-1β has been shown to decrease liver D1, [10] as well as thyroid hormone receptor (THR) levels. IL-6 and TNFa downregulate D1 and suppress TSH, are negatively correlated with fT3, and are positively correlated with rT3. [3] NF-κB also inhibits D1, and decreases the expression of Thyroid receptors α and β. [3]
[9] [10] The first English-language report, in 1931, originated from Dunlap and Kepler, physicians at the Mayo Clinic; they described the condition in a patient with features of Graves' disease. [ 2 ] [ 10 ] In 1937 periodic paralysis was linked with hypokalemia, as well as precipitation of attacks with glucose and insulin.
De Quervain's thyroiditis, also known as subacute granulomatous thyroiditis or giant cell thyroiditis, is a self-limiting inflammatory illness of the thyroid gland. [1] De Quervain thyroiditis is characterized by fever, flu-like symptoms, a painful goiter, and neck pain.