While occasional enlargement of the thyroid glands can be felt by the doctor during a physical examination, a T4 blood test is necessary to confirm the diagnosis. Levels of thyroid hormone can fluctuate in some cats so it may be necessary to repeat the test. Some cats will have a normal result on the T4 test but still have symptoms strongly suggestive of hyperthyroidism. In these cases it may be necessary to perform further tests. If your cat suffers hyperthyroidism, you must treat him daily with prescribed medication to prevent the thyroid glands from producing excessive levels of hormone.
Medication often gives good results, but some cats are at risk of side effects.
Should your cat be at risk, you will be required to medicate him 1-3 times each day and carefully monitor his health. We should also see your cat every three to four months to recheck blood tests and ensure the dose of required medication has not changed. Surgery is another option for treatment. Our veterinarians are able to surgically remove the affected lobe of the thyroid gland with few possible complications. Surgery generally prevents the need for daily medication.