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Practice Name

Boyette Animal Hospital

Primary Location
10931 Boyette Road
Riverview, FL 33569
Phone: 813-671-3400

Office Hours

DayOpenClosed
Monday7:00am7:00pm
Tuesday7:00am7:00pm
Wednesday7:00am7:00pm
Thursday7:00am7:00pm
Friday7:00am6:30pm
Saturday8:00am4:00pm
Sunday5pm to 7pmBoarding Only
Main Content

Feline Hyperthyroidism
By Dr. Rochelle Campbell

Hyperthyroidism is one of the most common endocrine diseases found in cats.  It is extremely rare in dogs (dogs usually tend to develop hypothyroidism).  This condition usually occurs as a result of a nodule that grows on the thyroid gland itself.  This nodule secretes thyroid hormones and this hormone release is unregulated by normal physiologic influences.  It usually occurs in late middle-aged and older cats.  Cats with hyperthyroidism typically present for a physical exam because their owners notice several clinical signs, including weight loss (despite a ravenous appetite), hyperactivity, behavioral changes and sometimes vomiting and diarrhea.   A veterinary exam on a hyperthyroid cat may reveal a large thyroid gland, thin body condition, an increased heart rate, possible heart murmur, thick nails and an unkempt appearance.  If your veterinarian suspects hyperthyroidism, he or she may recommend one or more blood tests to help confirm a diagnosis.  If bloodwork results reveal that the thyroid hormone level is high, then your veterinarian will discuss treatment options for your cat.

There are several options available for treatment.  I131 treatment (Radioactive iodine treatment) uses radioactive iodine to destroy the abnormal tissue on the thyroid gland and, will eliminate the need for daily, long term treatment with oral medication.  Your veterinarian will refer you to a facility that specifically performs this type of therapy as special precautions and handling need to be taken when performing this particular treatment.  Daily oral medication, such as Methimazole, that works to lower thyroid hormone levels (by specifically blocking thyroid hormone synthesis) is another effective option.  These types of medications can also occasionally be compounded into a topical paste that can be absorbed through the skin should it be too difficult to medicate a cat orally.  The oral route, however, should be the first choice if feasible.  A newer option for treatment is Science Diet y/d.  Studies have shown that this diet, if fed exclusively to a hyperthyroid cat, can lower thyroid hormone levels.  Surgical removal of the thyroid gland was once considered a preferred method of treatment but now the other treatment options mentioned above are preferred over surgery.  All of the treatments will involve follow up appointments as well as monitoring bloodwork periodically.  If you suspect your cat has hyperthyroidism, it is best to get your pet to the veterinarian as soon as possible so treatment will not be delayed.

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Feature Articles

Community Vaccine Clinic Learn more about a better alternative to low cost, parking lot vaccine events. Angie's List Award Boyette Animal Hospital has earned the service industry’s coveted Angie’s List Super Service Award ...

Testimonial

I can't express how Thankful I am for the Doctors and staff here. I brought my chihuahua "son" in yesterday for a check up after being attacked by a neighbors large dog earlier in the week. As usual, we both were treated with great care and concern as I also was a bit emotional. This is a place were the staff Truly care about animals/pets. I wouldn't take my fur babies Anywhere else and have referred my friends multiple times.

- Angie W. / Riverview, FL

Office Hours

DayOpenClosed
Monday7:00am7:00pm
Tuesday7:00am7:00pm
Wednesday7:00am7:00pm
Thursday7:00am7:00pm
Friday7:00am6:30pm
Saturday8:00am4:00pm
Sunday5pm to 7pmBoarding Only

Meet the Veterinarians

Meet The Team Dr.Bob Encinosa was born in Valrico, Florida and graduated from Brandon High School in 1980. He received his doctorate from the University of Florida College of Veterinary Medicine in 1987.Read More

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