primary hypothyroidism


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Related to primary hypothyroidism: tertiary hypothyroidism

hypothyroidism

 [hi″po-thi´roi-dizm]
deficiency of thyroid gland activity, with underproduction of thyroxine, or the condition resulting from it. In its severe form it is called myxedema and is characterized by physical and mental sluggishness, obesity, loss of hair, enlargement of the tongue, and thickening of the skin. In children the condition is known as cretinism. Called also athyria. adj., adj hypothy´roid.
pituitary hypothyroidism secondary hypothyroidism caused by a defect or lesion of the pituitary gland that interferes with production of thyrotropin; the majority of cases are caused by tumors.
primary hypothyroidism hypothyroidism due to disease of the thyroid gland itself, usually accompanied by increased levels of thyrotropin.
secondary hypothyroidism that caused by thyrotropin deficiency.

primary hypothyroidism

Hypothyroidism due to failure of the thyroid gland to produce metabolically adequate amounts of thyroid hormones. It is the most common form of hypothyroidism.
See also: hypothyroidism

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.

autoimmune hypothyroidism
see lymphocytic thyroiditis.
congenital hypothyroidism
results from congenital thyroid dysgenesis, defective hormone synthesis or severe iodine deficiency. There is dwarfism, macroglossia and mental dullness.
iatrogenic hypothyroidism
may follow treatment for hyperparathyroidism in cats.
juvenile hypothyroidism
congenital hypothyroidism (above).
primary hypothyroidism
that resulting from disease of the thyroid glands.
secondary hypothyroidism
caused by a deficiency of thyroid-stimulating hormone, usually as a result of a lesion in the pituitary gland.
tertiary hypothyroidism
caused by a lack of synthesis or release of thyrotropin releasing hormone.
References in periodicals archive ?
In the setting of primary hypothyroidism, the data do not allow differentiation between an effect of thyroid hormones on the pituitary (on growth hormone secretion) or the liver, but it appears to be a coordinated up-regulation of IGF-1 and ALS.
17) A high TSH level is indicative of a failing thyroid gland leading to primary hypothyroidism.
Etiologic classification of primary hypothyroidism (a) Autoimmune Hashimoto thyroiditis; post-Graves disease; postpartum Infectious acute or subacute viral thyroiditis Destructive neck irradiation; postoperative; radioiodine therapy; infiltrative conditions Drug related PTU; methimazole; lithium; amiodarone; iodides; iodine deficiency Congenital agenesis; enzymatic deficiencies; TSH resistance; endemic cretinism Idiopathic (a) PTU, propylthiouracil; TSH, thyroid-stimulating hormone.
Blood volumes and renal function in overt and subclinical primary hypothyroidism.
She reported on 15 women with primary hypothyroidism, euthyroid on stable doses of L-thyroxine, who participated in a 24-week double-blind crossover clinical trial.
Primary hypothyroidism presenting as a pituitary gland enlargement with regression following thyroxine therapy.
The patient's primary hypothyroidism had been well managed for many years at a dosage of 0.
Because either central or primary hypothyroidism can cause growth failure, both TSH and [T.
The test is intended for use as a screening method for primary hypothyroidism.
On June 29, New River submitted an IND on NRP409, the company's Carrierwave(TM) triiodothyronine (T3) hormone, as a treatment for patients with primary hypothyroidism.
About 25% of patients who are treated for primary hypothyroidism are maintained unintentionally on doses that can cause an undetectable TSH level.
Her medical history included diagnoses of hypertension, heart failure, type 2 diabetes mellitus, primary hypothyroidism, cataracts, and glaucoma.

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