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Peer-reviewed veterinary case report

Disorders of the equine thyroid gland.

Journal:
The Veterinary clinics of North America. Equine practice
Year:
2011
Authors:
Breuhaus, Babetta A
Affiliation:
Department of Clinical Sciences · United States
Species:
horse

Abstract

Regulatory control of the thyroid gland in horses is similar to other species. Clinical signs of hypothyroidism in adult horses are minimal. Several drugs and physiologic and pathophysiological states can cause circulating thyroid hormone concentrations to be low without actual pathology of the thyroid gland. Thus, nonthyroidal factors must be ruled out before a diagnosis of hypothyroidism can be made. Thyroid hormone supplementation seems to be well tolerated, even in euthyroid horses. Neonatal foals have very high circulating thyroid hormone concentrations, and deficiencies result in significant clinical signs. Unlike in adults, two syndromes of hypothyroidism are well described in foals.

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Original publication: https://pubmed.ncbi.nlm.nih.gov/21392657/