Browse our veterinary-reviewed Dog and Cat Illness Guide to learn more about pet health. Always talk to your veterinarian if you have a concern about your pet's symptoms or health.
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Hyperthyroidism is a common disease in older cats. The thyroid glands, which are located in the neck and regulate the metabolism, grow and increase production of the hormones that speed up the metabolism.
The enlargement is caused by a non-cancerous tumor.
In only 2% of cases, the tumor is actually cancerous.
If left untreated, hyperthyroidism will affect many organs. A high level of thyroid hormones will stimulate the heart to beat more rapidly. This leads to hypertension (high blood pressure), heart damage and eventually heart failure.
Eventually, hypertension will damage the kidneys, liver and eyes, resulting in sudden and permanent blindness.
The main signs of hyperthyroidism are increased appetite and weight loss.
Other signs may include:
If you notice any of the above signs, bring your cat to the veterinarian right away because there is danger of heart failure and death.
In order to properly diagnose your cat with hyperthyroidism, your veterinarian may perform the following:
Heart problems and hypertension can be treated. Typically, if blindness occurs it is permanent.
There are 3 treatment options. Your veterinarian will choose one depending on your cat's specific situation.
Cats that are promptly diagnosed and treated have a good prognosis. After surgery or radiation therapy, most cats can lead healthy lives. Cats on life-long medication can also live a normal life with regular follow-ups at the veterinarian.
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