Hyperthyroidism in cats is very common and is characterized by an increase in the size and function of the thyroid gland. It is usually seen in older cats, but cats as young as 2 years of age have been diagnosed with the disease. Cats with this disease will frequently have an increased appetite and weight loss. They may also have an increased level of activity, which is unusual for an older cat. Vomiting and other problems with the GI tract are other signs of this disease. However, there are those cats that do not have these symptoms. But if a cat shows signs of any of these symptoms, then it is necessary to test for the disease.
Since thyroid hormone levels can go up and down in cats, even if your cat has the disease it may not look like it on the basic screening test. If you think that your cat is showing signs of hyperthyroidism and the blood tests are inconclusive, then there is the T3 suppression test that will show it for sure.
Once your cat has been diagnosed with hyperthyroidism, there are three treatment options available.
Left untreated, hyperthyroidism is cats will ultimately become toxic from a high level of circulating thyroid hormone and be in a life-threatening situation. Hyperthyroidism in cats is a treatable disease and depending on the treatment chosen, curable.
The treatment options may sound like a lot at first, but hyperthyroidism is a treatable disease. After treatment with radiation and surgery, more of the cases have a los incidence of complications. You have lots of choices, ask your vet for a treatment option that is best for you and your cat.