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Discussion on Clinical Case: Exophthalmos (bulging eye) due to Cyst
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Moderator:
DrO
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Posted on Friday, Nov 2, 2007 - 8:08 am:
The main value of this report is how one goes about investigating abnormalities in the eye socket, in particular exophthalmos.
DrO
Vet Ophthalmol. 2007 Nov-Dec;10(6):394-7.
Retrobulbar dermoid cyst in a horse: a case report.
Munoz E, Leiva M, Naranjo C, Pena T.
Veterinary Teaching Hospital, Universitat Autonoma de Barcelona, Edifici V, Campus UAB, Bellaterra 08193, Barcelona, Spain.
A 4-year-old Andalusian horse was presented for examination following a 3-month history of exophthalmos of the right eye and a soft swelling of the right supraorbital fossa noted after blunt head trauma. Ultrasonographic examination of the swelling showed an anecogenic mass of 5 cm in diameter involving the retrobulbar space. Centesis of the mass through the supraorbital fossa was performed and yielded a serous fluid with 7.2 g/dL of total protein and density of 1040. No cells were seen in the sample. A tentative diagnosis of cyst was made. The cyst was surgically removed and the definitive histologic diagnosis was retrobulbar dermoid cyst. No recurrence has developed 18 months following the complete removal of the cyst capsule. To the authors' knowledge, there are no previous reports of retrobulbar dermoid cysts in horses. Localization, causes and success of surgical treatment of dermoid cysts are discussed.
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