adenomatous goiter

goiter /goi·ter/ (goi´ter) enlargement of the thyroid gland, causing a swelling in the front part of the neck.goi´trous

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aberrant goiter  goiter of a supernumerary thyroid gland.

adenomatous goiter  that caused by adenoma or multiple colloid nodules of the thyroid gland.

Basedow's goiter  a colloid goiter which has become hyperfunctioning after administration of iodine.

colloid goiter  a large, soft goiter with distended spaces filled with colloid.

diffuse toxic goiter  Graves' disease.

diving goiter  one that is movable, sometimes above and sometimes below the sternal notch.

exophthalmic goiter  one accompanied by exophthalmos.

fibrous goiter  one in which the thyroid capsule and stroma are hyperplastic.

follicular goiter  parenchymatous g.

intrathoracic goiter  one in which a portion is in the thoracic cavity.

iodide goiter  that occurring in reaction to iodides at high concentrations, due to inhibition of iodide organification.

lingual goiter  enlargement of the upper end of the thyroglossal duct, forming a tumor at the posterior part of the dorsum of the tongue.

lymphadenoid goiter  Hashimoto's disease.

multinodular goiter  goiter with circumscribed nodules within the gland.

nontoxic goiter  that occurring sporadically and not associated with hyperthyroidism or hypothyroidism.

parenchymatous goiter  one marked by increase in follicles and proliferation of epithelium.

simple goiter  simple hyperplasia of the thyroid gland.

suffocative goiter  one which causes dyspnea by pressure.

wandering goiter  diving g.

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adenomatous goiter

n.

Goiter due to the growth of multiple encapsulated adenomas or multiple nonencapsulated colloid nodules within its substance.

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adenomatous goiter

[ad′ənō′mətəs]

an enlargement of the thyroid gland caused by an adenoma or numerous colloid nodules.

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goiter, goitre

enlargement of the thyroid gland, causing a swelling in the front part of the neck.

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adenomatous goiter

multilobular goiters cause thyroid enlargement in cats.

colloid goiter

is characterized by the presence of a large soft thyroid gland with its glandular space distended with colloid. Most cases occur in neonatal lambs, calves and kids which show a high rate of stillbirths and weakness and a high mortality rate. Enlarged thyroid glands and alopecia are good indicants of the existence of a nutritional deficiency of iodine, the usual cause of goiter in animals.

dyshormonogenetic goiter

an impairment in thyroglobulin synthesis is thought to be the cause of inherited, congenital goiter recorded in sheep, cattle and goats. The thyroid gland is enlarged, there is a high neonatal mortality, a silky wool in sheep and a rough, sparse haircoat in goats. Called also inherited goiter.

goitrogen-induced goiter

there are a number of goitrogens in the environment of grazing animals. Their effect is almost entirely on the newborn. Common agents are low level intakes of cyanogenetic glycosides, e.g. in white clover, the glucosinolates in Brassica spp. plants, and mimosine in Leucaena leucocephala.

hyperplastic goiter

diffuse hyperplasia is the standard response to dietary iodine deficiency and to poisoning by plant goitrogens. It may also be caused by persistent exposure of the fetus to a high iodine intake of the dam. See also iodide goiter (below). Neonates are the usual subjects and the disease is manifested by clinical goiter, often sufficient to cause dystocia, and weak neonates with a high rate of stillbirths and deaths soon after birth.

inherited goiter

see dyshormonogenetic goiter (above).

iodide goiter

that occurring in reaction to iodides at high concentrations, due to inhibition of iodide organification.

nodular goiter

an endocrinologically inactive nodular enlargement of the thyroids in old dogs and horses. In old cats similar goiters sometimes develop functional adenomas.