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It occurs about 7.5 times more often in women than in men. [1] Often, it starts between the ages of 40 and 60, but can begin at any age. [6] It is the most common cause of hyperthyroidism in the United States (about 50 to 80% of cases). [1] [4] The condition is named after Irish surgeon Robert Graves, who described it in 1835. [6]
Surgery to remove the thyroid is another option. [1] This may be used in those with very large thyroids or when cancer is a concern. [1] In the United States hyperthyroidism affects about 1.2% of the population. [3] Worldwide, hyperthyroidism affects 2.5% of adults. [8] It occurs between two and ten times more often in women. [1]
Thyroid storm is characterized by an acute onset of symptoms of hyperthyroidism (fast heart rate, restlessness, agitation) accompanied by other features such as fever (temperatures often above 40 °C/104 °F), hypertension, mental status changes, diarrhea, and vomiting.
Hyperthyroidism is associated with high sex hormone-binding globulin , which may result in high serum estradiol levels in girls and testosterone levels in boys. However, unbound or free levels of these hormones are decreased. Hyperthyroidism before the age of four may cause neurodevelopmental delay.
Some do so only a few months after treatment while others may not be affected for 20–30 years. Hypothyroidism patients must begin a lifelong regimen of thyroid replacement hormones. While the onset of hypothyroidism is most common with radio-iodine treatment, the condition has been observed in patients treated with medication series and surgery.
Toxic multinodular goiter (TMNG), also known as multinodular toxic goiter (MNTG), is an active multinodular goiter associated with hyperthyroidism.. It is a common cause of hyperthyroidism [2] [3] in which there is excess production of thyroid hormones from functionally autonomous thyroid nodules, which do not require stimulation from thyroid stimulating hormone (TSH).