Breuhaus Babetta A
Department of Clinical Sciences, North Carolina State University, 4700 Hillsborough Street, Raleigh, NC 27606, USA.
Vet Clin North Am Equine Pract. 2011 Apr;27(1):115-28. doi: 10.1016/j.cveq.2010.12.002.
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.
马甲状腺的调节控制与其他物种相似。成年马甲状腺功能减退的临床症状很轻微。几种药物以及生理和病理生理状态可导致循环甲状腺激素浓度降低，而甲状腺并无实际病变。因此，在诊断甲状腺功能减退之前必须排除非甲状腺因素。甲状腺激素补充似乎耐受性良好，即使是甲状腺功能正常的马也是如此。新生马驹的循环甲状腺激素浓度非常高，缺乏会导致明显的临床症状。与成年马不同，马驹的甲状腺功能减退有两种综合征已得到充分描述。
