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see thyroid glandthyroid gland,
endocrine gland, situated in the neck, that secretes hormones necessary for growth and proper metabolism. It consists of two lobes connected by a narrow segment called the isthmus. The lobes lie on either side of the trachea, the isthmus in front of it.
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an increase in the function of the thyroid gland. Hyperthyroidism is one of the manifestations of a toxic diffuse goiter. It usually arises as a result of psychic trauma and sometimes with certain diseases and conditions, such as tuberculosis, rheumatism, or pregnancy. More rarely it is the result of an infection. It is manifested by increased excitability of the nervous system, intensification of reflexes, slight psychic agitation, rapid fatigability, acceleration of pulse rate, trembling of the hands, tendency to perspire, increase in basal metabolic rate, and weight loss. Hyperthyroidism is often combined with dysfunctions of other endocrine glands. Treatment for it includes remedies that calm the nervous system and microdoses of iodine.



The constellation of signs and symptoms caused by excessive thyroid hormone in the blood, either from exaggerated functional activity of the thyroid gland or from excessive administration of thyroid hormone, and manifested by thyroid enlargement, emaciation, sweating, tachycardia, exophthalmos, and tremor. Also known as exophthalmic goiter; Grave's disease; thyrotoxicosis; toxic goiter.
References in periodicals archive ?
Veterinarian Mark Peterson, a feline hyperthyroidism expert at the Animal Medical Center in new York City, says the disease really is becoming more common: "It's not just that we're diagnosing it more because we know what to look for now.
com)-- Feline hyperthyroidism is a growing concern in the veterinary industry, as it is fatal, if left untreated, and most often, pet owners are not even aware that their cat suffers from the disease.
Dechra's two key drugs, Vetoryl for Cushing's disease in dogs, and Felimazole, for feline hyperthyroidism, are being tested ahead of a US launch, which Mr Page hopes will be an important contributor to profits, though he declined to give any forecasts.

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