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My 11 year old Catahoula mixed breed was recently diagnosed

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with cancer. He has...
My 11 year old Catahoula mixed breed was recently diagnosed with cancer. He has a sizable tumor on his thyroid (he's been hypothyroid for years) and the cancer has metasthesized to his lungs. At this point, I'm trying to keep him comfortable and searching for anything to shrink or in a perfect world, kills the cancer. Any suggestions?
Submitted: 1 year ago.Category: Dog Veterinary
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Answered in 11 minutes by:
7/22/2016
Dog Veterinarian: Dr. Gary, Dog Veterinarian replied 1 year ago
Dr. Gary
Dr. Gary, Dog Veterinarian
Category: Dog Veterinary
Satisfied Customers: 19,882
Experience: DVM, Emergency Veterinarian, BS (Physiology)
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Hello. I'm sorry to hear about your dog.

With metastasis present, there is not much you can do for these dogs. The absolute best way to treat would be to use radioactive iodine therapy to selectively kill the thyroid tissue in the body. This is only offered in a handful of places in each state, so availability is an issue. They are also radioactive during the treatment, so they have to stay in the hospital for a few days. With this treatment, though, we can have survival times of ~ 22 months even with metastatic cancer.

The other option is to use chemotherapy. This may only get you another few months, but it's an option.

The prognosis without any treatment is a survival time ~ 3 months after the diagnosis.

The last thing you could try is Methimazole. It is what we treat benign thyroid tumors in cats with. It may help alleviate some signs and improve quality of life. It's not used much in dogs, but it's an option.

I hope this helps, let me know if you have any other questions.

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Customer reply replied 1 year ago
Thank you so much, Dr Gary. I appreciate any help I can get. I will ask my regular vet about Methimazole and research side effects. Take care and thanks for such a quick response!
Dog Veterinarian: Dr. Gary, Dog Veterinarian replied 1 year ago

And also look into radioactive iodine. That gives you the best response and it's non-invasive.

You're welcome.

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