Peer-reviewed veterinary case report
Dog with one-sided eye muscle paralysis from brain tumor
By Larocca, R.D.·Published in Veterinary Ophthalmology·2000·View original on Crossref →
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Original publication title: Unilateral external and internal ophthalmoplegia caused by intracranial meningioma in a dog
- Species:
- dog
Plain-English summary
A 15-year-old Belgian Sheepdog was brought to the vet because it had trouble moving its left eye, which was drooping and had a fixed, dilated pupil. The dog was still able to see, but the vet found a problem with the nerve controlling the eye. An MRI showed a mass in the brain, and despite surgery to remove it, the dog's condition worsened, and it sadly passed away the next day. The mass was diagnosed as a meningioma, a type of brain tumor.
People also search for: dog eye problems · Belgian Sheepdog eye drooping · dog brain tumor symptoms · meningioma treatment in dogs
Abstract
Unilateral internal and external ophthalmoplegia caused by an intracranial meningioma occurred in a 15‐year‐old Belgian Sheepdog. The dog initially presented with ventro‐lateral strabismus of the left eye, and ptosis of the left upper eyelid. Anisocoria was present with the left pupil fixed and dilated. Both eyes were visual. Neuro‐ophthalmic evaluation revealed a lesion located in the left oculomotor nerve. Pharmacological testing with dilute pilocarpine (0.1% in artificial tears) revealed evidence of parasympathetic denervation of the left eye. Further evaluation via magnetic resonance imaging (MRI) revealed a well‐defined mass to the left of midline and lateral to the sella turcica. An attempt was made to excise/debulk the mass due to worsening conditions and the dog died the following day. Necropsy revealed a mass of randomly arranged bundles and streams of spindle cells. Immunohistochemistry demonstrated a strong avidity for vimentin and a negative response for S‐100 protein. These findings suggest a diagnosis of meningioma.
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Search related cases →Original publication on Crossref: https://doi.org/10.1046/j.1463-5224.2000.00089.x