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Veterinary Pathology, Vol 16, Issue 5 539-542, Copyright © 1979 by American College of Veterinary Pathologists

ARTICLES

Intraocular melanoma in a horse

J. Murphy and S. Young

Sudden unilateral blindness occurred in a 7-year-old grey gelding Quarterhorse. Ophthalmoscopy revealed a pigmented mass arising from the nasal ciliary body of the right eye and extending around the posterior surface of the lens, and there were pigmented particles in the vitreous. Examination of the enucleated globe showed a circumscribed, black, dense and symmetrically ovoid mass with sessile attachment to the nasal ciliary region and extension to posterior lens capsule, vitreous and along the vitreal face of the detached retina to the optic papilla. The mass was composed of heavily pigmented, plump, polyhedral cells that invaded the vitreous and the inner limiting membrane of peripapillary retina and optic papilla. It was considered to be a primary, malignant, intraocular melanoma arising from a large uveal nevus.




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Copyright © 1979 by the American College of Veterinary Pathologists.