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Nasopharyngeal epidermal cyst in a dog
G W Ellison1, R L Donnell, G B Daniel
1Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville 37901-1071, USA.
Journal of the American Veterinary Medical Association
|December 15, 1995
Summary
A nasopharyngeal epidermal cyst caused airway obstruction in a Miniature Poodle. Surgical removal resolved the obstruction, highlighting this rare cyst location in veterinary medicine.
Area of Science:
- Veterinary Pathology
- Comparative Oncology
Background:
- Epidermal cysts are uncommon in dogs, typically found in the middle ear or intracranial regions.
- Nasopharyngeal masses can cause significant respiratory distress in canine patients.
Observation:
- A 12-year-old Miniature Poodle presented with inspiratory stridor due to a nasopharyngeal mass.
- Diagnostic imaging (radiography, MRI) and histopathology confirmed an epidermal cyst.
- The cyst exhibited stratified squamous epithelium and a transition to respiratory epithelium.
Findings:
- This case represents a unique nasopharyngeal location for an epidermal cyst in a dog.
- The lesion was likely acquired, potentially linked to prior ear inflammation and throat trauma.
- Histologic features included keratinization and proximity to underlying bone.
Implications:
- Surgical excision via a transpalatal approach successfully treated the airway obstruction.
- This case expands the known anatomical distribution of epidermal cysts in domestic animals.
- Prompt diagnosis and surgical intervention are crucial for managing nasopharyngeal masses causing respiratory compromise.