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Iris biopsy to investigate feline iris hyperpigmentation
Heidi J Featherstone1, Emma J Scurrell2, Mike Rhodes3
1The Ralph Veterinary Referral Centre, The Globe Business Park, Buckinghamshire, UK.
Veterinary Ophthalmology
|November 17, 2019
Summary
Iris biopsy in cats helps distinguish iris melanosis from early feline diffuse iris melanoma (FDIM). This diagnostic tool aids in deciding on early enucleation for FDIM, improving feline ocular health outcomes.
Area of Science:
- Veterinary Ophthalmology
- Ophthalmic Pathology
Background:
- Iris hyperpigmentation in cats can present diagnostic challenges.
- Differentiating benign melanosis from early feline diffuse iris melanoma (FDIM) is crucial for appropriate treatment.
Purpose of the Study:
- To evaluate the diagnostic utility of iris biopsy in cats with iris hyperpigmentation.
- To determine if iris biopsy can differentiate melanosis from early FDIM.
Main Methods:
- Retrospective review of seven cats with unilateral iris hyperpigmentation undergoing iris biopsy.
- Biopsy samples were obtained under general anesthesia with neuromuscular blockade.
- Histopathological analysis of biopsy samples.
Main Results:
- Histopathology confirmed melanosis in five cats and early FDIM in two cats.
- The biopsy procedure was diagnostic in six out of seven cats, with one requiring a repeat biopsy.
- Minor complications included hemorrhage, fibrin clot, corneal ulcer, and ocular hypertension.
Conclusions:
- Iris biopsy is a beneficial procedure for differentiating feline iris melanosis from early FDIM.
- This diagnostic approach supports informed decisions regarding early enucleation for FDIM.
- Biopsy aids in managing feline ocular conditions with pigmented lesions.
