Peer-reviewed veterinary case report
Dog with right eye bulging and vision loss from retrobulbar meningioma
By Regan, Daniel P et al.·Published in Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·2011·Department of Small Animal Medicine, United States·View original on PubMed →
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Original publication title: Clinicopathologic findings in a dog with a retrobulbar meningioma.
- Species:
- dog
Plain-English summary
An 11-year-old Fox Terrier was brought to the vet because it had been developing a bulging right eye and trouble seeing for the past 10 months. The vet found severe scarring on the cornea and a mass behind the eye that was confirmed to be a meningioma (a type of brain tumor) after imaging and a biopsy. The dog underwent surgery to remove the affected eye and the tumor. After the surgery, the tumor was identified as a meningioma, and the dog was monitored for recovery.
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Abstract
An 11-year-old Fox Terrier dog was evaluated for a 10-month history of progressive exophthalmia and visual deficits in the right eye. Ophthalmologic examination revealed severe corneal fibrosis and pigmentation, which obscured examination of the anterior chamber of the right eye. There was decreased retropulsion of the right eye. Neurological examination revealed an absent menace response bilaterally. Pupillary light reflex was normal in the left eye. Due to the corneal pathology, pupillary light reflex was unable to be evaluated in the right eye. A retrobulbar mass with heterogeneous echotexture was identified using ultrasonography. Cytological evaluation of a fine-needle aspirate of the mass disclosed a neoplastic cell population consisting of round to polygonal cells with lightly basophilic to gray cytoplasm and round to ovoid nuclei having a coarse granular chromatin pattern. Magnetic resonance imaging disclosed a right-sided retrobulbar mass that extended through the optic canal and was contiguous with an extra-axial mass in the ventral right rostral and middle cranial fossae. The mass displayed homogenous and strong contrast enhancement. Following exenteration, histological examination of the retrobulbar mass was consistent with meningioma. Immunohistochemically, tumor cells stained positive for vimentin (cytoplasmic) and E-cadherin (membranous), and negative for S100, pancytokeratin, and cytokeratins AE1 and AE3.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/21908339/