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Individual differences |
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Biological: Behavioural genetics · Evolutionary psychology · Neuroanatomy · Neurochemistry · Neuroendocrinology · Neuroscience · Psychoneuroimmunology · Physiological Psychology · Psychopharmacology (Index, Outline)
This disorder is believed to be the most common cause of primary hypothyroidism in North America. It occurs far more often in women than in men (10:1 to 20:1), and is most prevalent between 45 and 65 years of age.
A combination of genetic and environmental factors initiate the autoimmune responce in Hashimoto's thyroiditis. A family history of thyroid disorders is common, with the HLA-DR5 gene most strongly implicated conferring a relative risk of 3 in the UK.
A wide variety of environmental triggers such as iodine, pure diet, infections, drugs and chemical pollutants can initiate Hashimoto's thyroiditis and contribute to the disease development in genetically susceptible individuals.
The underlying specifics of the immune system destruction of thyroid cells is not clearly understood. Various autoantibodies may be present against thyroid peroxidase, thyroglobulin and TSH receptors, although a small percentage of patients may have none of these antibodies present. A percentage of the population may also have these antibodies without developing Hashimoto's thyroiditis.
Physiologically, antibodies against thyroid peroxidase and/or thyroglobulin cause gradual destruction of follicles in the thyroid gland. Accordingly, the disease can be detected clinically by looking for these antibodies in the blood. It is also characterised by invasion of the thyroid tissue by leukocytes, mainly T-lymphocytes. It is associated with non-Hodgkin lymphoma.
Many patients do not show any symptoms initially. As the inflammation and destruction of the thyroid gland progress, less thyroid hormone is produced by the gland and person becomes hypothyroid and can get enlarged thyroid gland, called goiter.
In the early phase of the disease some people can experience hashitoxicosis which is characterized by release of too much thyroid hormone due to destruction of the thyroid gland. During this short events symptoms of Hashimoto's thyroiditis might include typical symptoms of hyperthyroidism.
Weight gain, weight loss, depression, mania, fatigue, panic attacks, low pulse, fast pulse, high cholesterol, reactive hypoglycemia, constipation, migraines, memory loss, infertility and hair loss are a few possible symptoms.
Hypothyroidism caused by Hashimoto's Thyroiditis is treated with thyroid hormone replacement. A small pill taken once a day should be able to keep the thyroid hormone levels normal. This medicine will, in most cases, need to be taken for the rest of the patient's life.
Also known as Hashimoto's disease, Hashimoto's thyroiditis is named after the Japanese physician Hashimoto Hakaru (1881−1934) of the medical school at Kyushu University, who first described the symptoms in 1912 in a German publication.
- Hashimoto's disease at the Mayo Clinic
- Thyroid Autoimmunity at AHSTA Resources
- Hashimoto's disease at Outsmart Disease
Endocrine pathology of psychological interest (E00-35)
thyroid Hypothyroidism (Iodine deficiency, Cretinism, Congenital hypothyroidism, Goitre) - Hyperthyroidism (Graves-Basedow disease, Toxic multinodular goitre) - Thyroiditis (De Quervain's thyroiditis, Hashimoto's thyroiditis)
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