Pharyngeal neuromuscular dysfunction associated with bilateral guttural pouch tympany in a foal.

This research article discusses the case of a two-month-old warmblood filly with bilateral guttural pouch tympany that subsequently developed pharyngeal neuromuscular dysfunction after surgery to address the condition.

Introduction to the Case

• The paper details the case of a 2-month-old warmblood filly that was presented to a veterinary clinic with a non-painful, fluctuating swelling located in her parotid and laryngeal area. The swelling had developed over a week’s duration.
• The unique symptom, in this case, was her bilateral guttural pouch tympany, which is an uncommon air-filled swelling in the guttural pouches of horses.

Bilateral Guttural Pouch Tympany Diagnosis

• The condition was diagnosed based on the foal’s clinical signs and further investigations.
• Bilateral guttural pouch tympany refers to an abnormal condition where both guttural pouches, an anatomical feature of the horse’s respiratory tract, are distended with air. This swelling usually leads to a noticeable distention under the parotid area and can cause respiratory and swallowing difficulties.

Surgical Intervention and Resulting Pharyngeal Neuromuscular Dysfunction

• After diagnosing the condition, surgical intervention was chosen as the best option to resolve the issue. Surgery usually involves creating an opening in the pouch for air to escape continuously.
• The surgery did resolve the guttural pouch tympany condition in the filly. However, a postoperative complication developed: the foal experienced pharyngeal neuromuscular dysfunction.
• Pharyngeal neuromuscular dysfunction refers to the inability to coordinate the muscles in the pharynx (the part of the throat behind the mouth and nasal cavity and above the esophagus and larynx), affecting the animal’s ability to swallow properly.