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Can cats become hypothyroid after treatment for hyperthyroidism?

April 26, 2017Cats Hyperthyroidism Hypothyroid treatment

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Can cats become hypothyroid after treatment for hyperthyroidism?

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Iatrogenic hypothyroidism following treatment for hyperthyroidism including chronic methimazole, bilateral thyroidectomy or radioactive iodine treatment is a common cause of decreased T4 levels. Recent laboratory data suggest that the canine endogenous TSH assay has sufficient cross-reactivity with feline TSH to be useful in the diagnosis of primary feline hypothyroidism.