Intraocular mass
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Introduction
- Intra-ocular neoplasia is not common but is of significance since it may signal pre-existing neoplasia elsewhere in the body.
- Signs : visible mass, blindness, ocular pain.
- Diagnosis : often by simple ophthalmoscopy but sometimes by ocular ultrasonography (where ocular media are obscured).
- Intra-ocular neoplasia in the cat is often signaled by inflammatory disease - uveitis.
- Treatment : in almost all cases enucleation but, in some, tumor resection by sharp knife or laser ablation of the neoplasm.
- Prognosis : generally requires enucleation and, in some cases, systemic metastasis has already occurred (melanoma) or localized spread may be inevitable (sarcoma).
Diagnosis
Clinical signs
- Ophthalmoscopy showing lesions from iridal cellular infiltration to a posterior segment mass.
Sequelae
Prognosis
- Prognosis very dependent on tumor types - some (limbal melanomas in the cat) are very unlikely to cause ocular problems while other (diffuse iridal melanomas in the cat) cause glaucoma and readily metastasize.
Reasons for treatment failure
- Blindness
from glaucoma, hyphema, obscuration of ocular media.
- Pain from glaucoma.
- Death from metastatic disease.
Sources
Publications
Other sources of information
- Petersen-Jones S & Crispin S (2002)BSAVA Manual of Small Animal Ophthalmology. 2nd edn. British Small Animal Veterinary Association. ISBN 0 905214 54 4
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