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Canine dacryolithiasis: a case description and mineral analysis.
Pedro Malho1, Jane Sansom, Phillipa Johnson
1Unit of Comparative Ophthalmology, Centre of Small Animal Studies, Animal Health Trust, Newmarket, UK. pedro.malho@aht.org.uk
Veterinary Ophthalmology
|September 20, 2012
Summary
A canine eyelid cyst containing dacryoliths, or tear stones, was surgically removed. This successful treatment resolved epiphora and prevented recurrence in a Labrador retriever.
Area of Science:
- Veterinary Ophthalmology
- Canine Pathology
Background:
- A 4-year-old Labrador retriever presented with chronic epiphora and a painless eyelid swelling.
- The nasolacrimal system's patency was confirmed, ruling out complete obstruction.
Observation:
- Ultrasonography identified a well-demarcated, fluid-filled cyst near the nasolacrimal system.
- Surgical exploration revealed the cyst's proximity to the inferior canaliculus without direct communication.
Findings:
- The cyst contained multiple intraluminal calculi (dacryoliths) composed of calcium carbonate.
- Histopathology confirmed the cyst was lined by stratified squamous epithelium, suggesting a lacrimal canaliculus origin.
- Surgical excision led to complete resolution of epiphora with no recurrence over 12 months.
Implications:
- This case highlights a rare presentation of a lacrimal canalicular diverticulum progressing to a cyst with dacryolith formation.
- Surgical excision is an effective treatment for such conditions, restoring normal tear drainage.
- Understanding the pathogenesis of dacryolithiasis is crucial for veterinary ophthalmologists treating eyelid and tear duct abnormalities.
