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Collie eye anomaly in a mixed-breed dog
Antonella Rampazzo1, Antonio D'Angelo, Maria Teresa Capucchio
1Department of Animal Pathology, College of Veterinary Medicine, University of Torino, 10095 Grugliasco, Italy. antonella.rampazzo@unito.it
Veterinary Ophthalmology
|September 24, 2005
Summary
A mixed-breed dog with tetraparesis showed eye abnormalities mimicking Collie eye anomaly (CEA). Histopathology confirmed optic nerve coloboma and choroidal hypoplasia, unrelated to the dog's fatal spinal lymphoma.
Area of Science:
- Veterinary Ophthalmology
- Canine Neurology
- Comparative Pathology
Background:
- Canine eye anomalies can cause significant visual impairment.
- Collie eye anomaly (CEA) is a common inherited condition in certain breeds.
- Accurate diagnosis of ocular conditions is crucial for prognosis.
Observation:
- A 5-year-old mixed-breed dog presented with tetraparesis and reduced menace response.
- Ophthalmic examination revealed bilateral optic nerve coloboma and severe choroidal hypoplasia.
- These posterior segment anomalies mimicked the appearance of Collie eye anomaly (CEA).
Findings:
- Histopathology confirmed bilateral optic disc coloboma and severe choroidal hypoplasia.
- The dog was also diagnosed with a spinal cord lymphoma, deemed unrelated to the ocular findings.
- The ocular lesions caused only moderate visual impairment.
Implications:
- This case highlights the importance of thorough ophthalmic examination in dogs presenting with neurological deficits.
- The incidental finding of CEA-like lesions in a mixed-breed dog broadens the differential diagnosis for such ophthalmic presentations.
- Understanding the distinction between inherited conditions and incidental findings is vital for accurate veterinary diagnosis and management.