This term refers to the development of a cyst in the tissue under the epiglottis. The cause is unknown, but we do know that the lining of the cyst will continue to secrete fluid if not completely destroyed or removed. Clinical signs include rattling, wheezing, or gurgling when the horse is exercising. Less commonly, food and water may be seen coming from the horse’s nostrils if the cyst is large enough to affect swallowing. These cysts occur more commonly in younger horses, but they can be seen in older horses in more rare occasions.
Diagnostic tests
Video endoscopy
Treatment
Because the cyst lining continuously secretes fluid, it must be destroyed or removed. Several techniques are possible to accomplish this goal, including the use of a diode laser to destroy the lining of the cyst, which can be performed under standing sedation. The other, most common, technique that we utilize is to amputate the cyst using a wire snare with the horse under a very brief period of general anesthetic (similar to a routine castration), which avoids potential complications related to the thermal effects of the laser and has a very low rate of recurrence.
