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Feline hemangiosarkoma of the third eyelid
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In this case report, a 15-year-old Domestic Short-haired cat is described. A small red mass protruding from the anterior surface of the third eyelid in the left eye was present. The clinical signs were non-diagnostic, the surgical therapy was curative.
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Only mild bilateral conjunctivitis and nuclear sclerosis were revealed on initial ophthalmic examination. After anti-inflammatory treatment, surgery and cryotherapy were performed.
On histopathologic examination the mass was located just beneath the conjunctival epithelium, suggesting that the conjunctiva was the tissue of origin. The tumor showed high cellularity and was composed of pleomorphic spindle and polygonal cells arranged in interlacing bundles and solid sheets.
The presence of slit-like spaces between tumor cells containing erythrocytes demonstrated the vascular differentiation. Mitotic activity was moderate, but atypical mitoses were detected.
The surgical area healed uneventfully and after 7 months there was no recurrence. To the authors` knowledge, this is the first report of conjunctival hemangiosarcoma of the third eyelid in a cat.
Source: Multari, Domenico, Vascellari, Marta & Mutinelli, Franco (2002): Hemangiosarcoma of the third eyelid in a cat. In: Veterinary Ophthalmology 5 (4), 273-276.
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