What is Feline Hyperthyroidism?

What is Feline Hyperthyroidism?

Feline hyperthyroidism is a disorder that occurs when the thyroid gland produces an excess of thyroid hormone.

imgres-3The thyroid gland is a butterfly shaped gland that is found just below the larynx (voice box) in front of the trachea (windpipe). This gland is responsible for producing thyroid hormones T3 and T4, which are released into the blood stream secondary to the signal from the brain (hypothalamus and pituitary glands). These hormones are responsible for maintaining the bodies many functions including heart rate, breathing, intestinal movement, attitude, sweat glands and overall metabolism. When this gland becomes over stimulated and excessive thyroid hormone is released the entire body is affected.

Feline hyperthyroidism has been recognized as the most common endocrine disorder of the cat. The thyroid levels increase due to a tumor, most often benign (96-97%) that is associated with the thyroid gland. This tumor secretes thyroid hormone and does not respond to the normal signals of the body to stop producing and releasing this hormone in spite of adequate levels. Feline hyperthyroidism can be fatal if left untreated.