A retrobulbar meningioma as a cause of unilateral exophthalmos and blindness in a horse

作者：Naylor R J^*; Dunkel B; Dyson S; Paz Penuelas M P; Dobson J

来源：Equine Veterinary Education, 2010, 22(10): 503-510.

DOI：10.1111/j.2042-3292.2010.00112.x

• horse
• MRI
• CT
• radiotherapy
• neoplasia

P>This report describes the unusual diagnosis of a retrobulbar syncytial meningioma in a 16-year-old Thoroughbred gelding. The horse initially presented with unilateral left sided exophthalmos and apparent blindness characterised by unilaterally absent menace and pupillary light responses. Magnetic resonance imaging (MRI) identified a well-defined soft tissue mass intimately associated with the optic nerve. Based on the characteristic MRI appearance, a meningioma was suspected. The eye was enucleated under general anaesthesia and partial excision of the mass was achieved. Histopathology confirmed the diagnosis and the horse underwent a course of adjuvant radiotherapy. Twelve months following surgery the horse is back in work, no neurological abnormalities have been detected and follow-up computed tomographic imaging of the skull has revealed mild bone sclerosis with no remnants of the mass identified.

• 出版日期2010-10