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Hashimoto's thyroiditis, also known as chronic lymphocytic thyroiditis, Hashimoto's disease and autoimmune thyroiditis, is an autoimmune disease in which the thyroid gland is gradually destroyed. [7] [1] Early on, symptoms may not be noticed. [3] Over time, the thyroid may enlarge, forming a painless goiter. [3]
[8] [9] Hashimoto's thyroiditis is the most common cause of hypothyroidism in countries with sufficient dietary iodine. [3] Less common causes include previous treatment with radioactive iodine , injury to the hypothalamus or the anterior pituitary gland, certain medications, a lack of a functioning thyroid at birth , or previous thyroid surgery .
Hypothermia is defined as a body core temperature below 35.0 °C (95.0 °F) in humans. [2] Symptoms depend on the temperature. In mild hypothermia, there is shivering and mental confusion.
In the US, hypothyroidism and hyperthyroidism were respectively found in 4.6 and 1.3% of the >12y old population (2002). [3] In some types, such as subacute thyroiditis or postpartum thyroiditis, symptoms may go away after a few months and laboratory tests may return to normal. [4] However most types of thyroid disease do not resolve on their own.
Hashimoto's thyroiditis was first described by Japanese physician Hashimoto Hakaru working in Germany in 1912. Hashimoto's thyroiditis is also known as chronic lymphocytic thyroiditis, and patients with this disease often complain about difficulty swallowing. This condition may be so mild at first that the disease goes unnoticed for years.
Cold sensitivity may be a symptom of hypothyroidism, anemia, low body weight, iron deficiency, vitamin B 12 deficiency, fevers, fibromyalgia or vasoconstriction. [2] There may also be differences in people in the expression of uncoupling proteins , thus affecting their amount of thermogenesis .
Broda Otto Barnes (14 April 1906 – 1 November 1988) was an American physician and professor of medicine who studied endocrine dysfunction, particularly hypothyroidism. [4] [5] In the 1970s, Barnes published several books arguing that hypothyroidism was underdiagnosed in the U.S. and was responsible for a wide range of health problems.
The main diagnostic sign is an oral body temperature that averages well below 37.0 °C (98.6 °F). This overlaps with normal body temperature, which is usually within the range of 36.5–37.5 °C (97.7–99.5 °F). [5] [6] Wilson says that his diagnosis is confirmed if the patient responds to treatment with slow-release T3 (SR-T3).