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Lacrimal bone agenesis in a dog
Riccardo Rossi1, Domenico Sainato1, Vim Kumaratunga1
1Eastcott Referrals, Edison Park, Dorcan Way, Swindon SN3 3RB, Wiltshire, United Kingdom (Rossi, Sainato, Renfrew); Langford Vets, University of Bristol School of Veterinary Sciences, Langford House, Langford, Bristol, BS40 5DU, United Kingdom (Kumaratunga).
Summary
Congenital lacrimal bone agenesis, a rare skull defect, can cause eye swelling in dogs. Computed tomography dacryocystography aids in diagnosing this condition.
Area of Science:
- Veterinary Medicine
- Comparative Pathology
- Canine Ophthalmology
Background:
- A 20-month-old Dachshund presented with a persistent swelling near the medial canthus of the left eye.
- Previous treatments and cytological analysis suggested an inflammatory process.
Observation:
- Computed tomography (CT) revealed a triangular bone defect in the skull beneath the swelling.
- CT dacryocystography showed contrast pooling in the maxillary recess and nasal cavity, not the lacrimal duct.
Findings:
- The diagnostic imaging indicated lacrimal bone agenesis, a congenital condition.
- This agenesis resulted in abnormal drainage of the lacrimal system.
Implications:
- Congenital skull anomalies, including lacrimal bone agenesis, should be considered in cases of medial canthus swelling.
- CT dacryocystography is a valuable diagnostic tool for evaluating canine lacrimal system abnormalities.
