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Inadequate secretion of thyroid hormone by the thyroid gland due to treatments that include medications (such as amiodarone), radioactive iodine ablation of the gland, or surgical excision of the thyroid.
See also: hypothyroidism
deficiency of thyroid gland activity, with underproduction of thyroxine, or the condition resulting from it. Common in adult dogs, particularly certain breeds, as a result of an idiopathic atrophy of the thyroid or a lymphocytic thyroiditis. Alopecia, weight gain, mental dullness, fatigue, cold intolerance, infertility and neurological deficits are seen. In food animals the syndrome is classical neonatal colloid goiter. See also goiter.
see lymphocytic thyroiditis.
results from congenital thyroid dysgenesis, defective hormone synthesis or severe iodine deficiency. There is dwarfism, macroglossia and mental dullness.
may follow treatment for hyperparathyroidism in cats.
congenital hypothyroidism (above).
that resulting from disease of the thyroid glands.
caused by a deficiency of thyroid-stimulating hormone, usually as a result of a lesion in the pituitary gland.
caused by a lack of synthesis or release of thyrotropin releasing hormone.