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The most common thyroid disorder for cats is hyperthyroidism. Hypothyroidism is a rare condition for cats, the most common causes of low serum concentration of thyroxine in cats is an underlying condition (non-thyroidal illness) or iatrogenic. Other causes are caused by birth defect. Adult-onset primary/secondary hypothyroidism is very rare. [2]
Thyroidectomy is a common surgical procedure that has several potential complications or sequelae including: temporary or permanent change in voice, temporary or permanently low calcium, need for lifelong thyroid hormone replacement, bleeding, infection, and the remote possibility of airway obstruction due to bilateral vocal cord paralysis.
Removal of, or trauma to, the parathyroid glands due to anterior neck surgery (including thyroid surgery) (thyroidectomy), parathyroid surgery (parathyroidectomy). This is the most common cause of hypoparathyroidism, with 78% of cases of hypoparathyroidism arising due to a complication of anterior neck surgery. [5]
Iodine deficiency is the most common cause of primary hypothyroidism and endemic goiter worldwide. [8] [9] In areas of the world with sufficient dietary iodine, hypothyroidism is most commonly caused by the autoimmune disease Hashimoto's thyroiditis (chronic autoimmune thyroiditis). [8] [9] Hashimoto's may be associated with a goiter.
Operations involve removal of the thyroid gland (thyroidectomy) either as a part of the gland (lobectomy or hemithyroidectomy), or the whole gland (total thyroidectomy). Incomplete resections (sub-total or near total thyroidectomy) are also infrequently performed, but are disfavored by most surgeons [citation needed].
Potential complications include thyroid lymphoma. [2] Further complications of hypothyroidism can include high cholesterol, heart disease, heart failure, high blood pressure, myxedema, and potential problems in pregnancy. [1] Hashimoto's thyroiditis is thought to be due to a combination of genetic and environmental factors.
3. Keebler Fudge Magic Middles. Neither the chocolate fudge cream inside a shortbread cookie nor versions with peanut butter or chocolate chip crusts survived.
The most common type of hyperthyroidism, Graves' disease, may additionally cause eye problems (Graves' ophthalmopathy) and skin changes of the legs (pretibial myxedema). [6] Thyroid disease may also cause muscle weakness in the form of thyrotoxic myopathy , but this is constant rather than episodic.