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What
is Hyperthyroidism?
Older
cats (15 is the average age) often
develop a benign growth in one of
both thyroid glands, resulting in
excessive hormone production. The
thyroid glands sit above the voice
box and are generally not palpable.
When hyperthyroidism develops, that
generally become palpable. Their
normal function is to produce
hormones that control the body's
metabolism (e.g., how fast food
calories are burned, how much
inhaled oxygen is used and how fast
the heart beats). In other words,
how much thyroid hormone is being
produced will determine how fast
your cat's "engine is revving."
What are the signs of
Hyperthyroidism?
Hyperthyroid cats tend to lose
weight despite a ravenous appetite.
They may drink excessive amounts of
water, have diarrhea, vomit
intermittently, and become
hyperactive or irritable. The heart
rate is elevated and sometimes
irregular.
Is
there a test for Hyperthyroidism?
A
blood test to measure the thyroid
hormone level is available.
Confirming hyperthyroidism is very
important because other problems,
such as diabetes, heart disease and
inflammatory bowel disease can mimic
the signs of hyperthyroidism. Older
cats may have multiple health
problems, so a complete baseline
blood level evaluation for organ
function should be done at the same
time. If a cat has poor kidney
function as well as hyperthyroidism,
it may be a poor candidate for
treatment.
Is
there treatment for Hyperthyroidism?
Yes,
if the cat has good kidney function,
two effective treatments,
radioactive iodine or surgery, can
eliminate the problem. A short term
treatment with a medication may be
necessary to get your cat ready for
either of the main treatments.
What is the prognosis for a cat with
Hyperthyroidism?
Generally favorable if they have
good organ function. |
The Doctor's Corner ...
Hyperthyroidism in Pets 
