Yeah. So we've got one. Thankfully it's really light colored and doesn't bother her. Why does something always happen right before Expo? (last year it was The Mange). Of course she had a great day at Vet-Camp with all the lovin' and cookies. Iris cyst From Wikipedia, the free encyclopedia
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An iris cyst
, or uveal cyst
, is a small hollow structure either attached to the iris
of the eye
or floating free in the anterior chamber
. An iris cyst is composed of a single cell layer of epithelium
and is filled with fluid.
It is most commonly seen as secondary to inflammation in the eye, especially with glaucoma
. They are most commonly seen in dogs
. Golden Retrievers
, Labrador Retrievers
, and Boston Terriers
are the most commonly affected breeds.
Iris cysts also occur in cats
. The cysts are usually free floating in dogs, attached to the pupillary margin in cats, and present in the interior of the iris (especially blue irides) in horses.
Iris cysts usually cause no symptoms, but in large numbers they can cause glaucoma by obstructing the drainage angle
of the eye. Golden Retrievers may have a higher rate of glaucoma associated with iris cysts.
Iris cysts need to be differentiated from iris melanoma
, a tumor, by demonstrating their hollowness. A light directed at an iris cyst will cause it to transilluminate
. Iris cysts can be collapsed if necessary by a veterinarian
with a small needle carefully introduced into the anterior chamber.
The cysts may also be destroyed by use of a semiconductor diode laser