Senior Pet Problem: Cushing’s Disease.
Does your elderly dog drink more than usual? Is it losing
hair or getting pot-bellied? It may have Cushing’s Disease.
Cushing’s Disease, or Hyperadrenocorticism, is caused by the
body producing excessive amounts of steroids. We see this dog most commonly in
older, small breed dogs such as maltese and poodles, but it can affect many
breeds.
It can be a bit of a tricky disease to diagnose. The most
common signs owners notice are increased drinking and urination, a pot-bellied
appearance and hair loss. This hair loss can show certain patterns such as
losing hair along the length of the tail (producing what looks like a “rats
tail”), and along both sides of the body.
Cushing’s Disease is most commonly caused by a small, benign
tumour on the pituitary gland. This tumour produces a hormone that stimulates
the adrenal gland to produce excessive amounts of steroids. A small amount of
steroids is normal for the body to produce, but this increased production
becomes problematic. There is a less common form of Cushing’s Disease caused by
a tumour on the adrenal gland, which produces similar signs.
Diagnosis is by a specific blood test, and in some cases by
ultrasound. It can be quite challenging to diagnose in some cases, but with the
right tests and experienced vets most cases are diagnosed quite quickly.
There are a couple of treatment options available. The older
treatment used to be a tablet that destroyed the adrenal glands. The problem
with this treatment is it could potentially destroy too much of the glands,
which is very dangerous. The newest treatment works by blocking the steroid
production pathways. It is much safer and easier to use, and gives excellent
control in most cases.
If your dog is showing any signs of hair loss, increased
drinking or looking pot-bellied it should be checked out by a vet. Now is a
good time to have it examined with our Senior Pet Month giving a $15 discount
on all Senior Pet Consultations throughout June.
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