Doença de Graves
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Graves' disease is a condition that affects the function of the thyroid, which is a butterfly-shaped gland in the lower neck. The thyroid makes hormones that help regulate a wide variety of critical body functions. For example, thyroid hormones influence growth and development, body temperature, heart rate, menstrual cycles, and weight. In people with Graves' disease, the thyroid is overactive and makes more hormones than the body needs. The condition usually appears in mid-adulthood, although it may occur at any age.
Descrição
Graves' disease is a condition that affects the function of the thyroid, which is a butterfly-shaped gland in the lower neck. The thyroid makes hormones that help regulate a wide variety of critical body functions. For example, thyroid hormones influence growth and development, body temperature, heart rate, menstrual cycles, and weight. In people with Graves' disease, the thyroid is overactive and makes more hormones than the body needs. The condition usually appears in mid-adulthood, although it may occur at any age.
Excess thyroid hormones can cause a variety of signs and symptoms. These include nervousness or anxiety, extreme tiredness (fatigue), a rapid and irregular heartbeat, hand tremors, frequent bowel movements or diarrhea, increased sweating and difficulty tolerating hot conditions, trouble sleeping, and weight loss in spite of an increased appetite. Affected women may have menstrual irregularities, such as an unusually light menstrual flow and infrequent periods. Some people with Graves' disease develop an enlargement of the thyroid called a goiter. Depending on its size, the enlarged thyroid can cause the neck to look swollen and may interfere with breathing and swallowing.
Between 25 and 50 percent of people with Graves' disease have eye abnormalities, which are known as Graves' ophthalmopathy. These eye problems can include swelling and inflammation, redness, dryness, puffy eyelids, and a gritty sensation like having sand or dirt in the eyes. Some people develop bulging of the eyes caused by inflammation of tissues behind the eyeball and "pulling back" (retraction) of the eyelids. Rarely, affected individuals have more serious eye problems, such as pain, double vision, and pinching (compression) of the optic nerve connecting the eye and the brain, which can cause vision loss.
A small percentage of people with Graves' disease develop a skin abnormality called pretibial myxedema or Graves' dermopathy. This abnormality causes the skin on the front of the lower legs and the tops of the feet to become thick, lumpy, and red. It is not usually painful.
Padrões de herança
The source lists the following possible inheritance patterns: Pattern unknown. More than one pattern can apply in different cases.
Related genes
Other names
Autoimmune hyperthyroidism
Basedow disease
Basedow's disease
Exophthalmic goiter
Doença de Graves
Toxic diffuse goiter
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Leitura adicional e referências
- Doença de Graves; MedlinePlus, National Library of Medicine.
- Eschler DC, Hasham A, Tomer Y. Cutting edge: the etiology of autoimmune thyroid diseases. Clin Rev Allergy Immunol. 2011 Oct;41(2):190-7. doi: 10.1007/s12016-010-8245-8.
- Hasham A, Tomer Y. Genetic and epigenetic mechanisms in thyroid autoimmunity. Immunol Res. 2012 Dec;54(1-3):204-13. doi: 10.1007/s12026-012-8302-x.
- Jacobson EM, Huber A, Tomer Y. The HLA gene complex in thyroid autoimmunity: from epidemiology to etiology. J Autoimmun. 2008 Feb-Mar;30(1-2):58-62. doi: 10.1016/j.jaut.2007.11.010. Epub 2008 Jan 4.
- National Institute of Diabetes and Digestive and Kidney Diseases
- Simmonds MJ, Gough SC. The search for the genetic contribution to autoimmune thyroid disease: the never ending story? Brief Funct Genomics. 2011 Mar;10(2):77-90. doi: 10.1093/bfgp/elq036.
- Tomer Y. Genetic susceptibility to autoimmune thyroid disease: past, present, and future. Thyroid. 2010 Jul;20(7):715-25. doi: 10.1089/thy.2010.1644.
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