IMAGING DIAGNOSIS - UNILATERAL TRIGEMINAL NEURITIS MIMICKING PERIPHERAL NERVE SHEATH TUMOR IN A HORSE.
A 16-year old Warmblood gelding presented with a nonhealing corneal ulcer and absent corneal sensation in the left eye. A lesion affecting the maxillary and ophthalmic branches of the left trigeminal nerve was suspected. Magnetic resonance (MR) imaging identified marked thickening of the ophthalmic and maxillary branches of the left trigeminal nerve. The nerve was iso- to hypointense on T1-weighted and T2-weighted images with heterogeneous enhancement. A peripheral nerve sheath tumor was suspected, however granulomatous neuritis was histopathologically confirmed. These inflammatory changes can result in severe nerve enlargement and should be considered with MR findings suggestive of peripheral nerve sheath tumor.
['Beltran|Elsa|E|', 'Grundon|Rachael|R|', 'Stewart|Jennifer|J|', 'Biggi|Marianna|M|', 'Holloway|Andrew|A|', 'Freeman|Courtenay|C|']
D000818:Animals D002701:Chloramphenicol D003937:Diagnosis, Differential D006734:Horse Diseases D006736:Horses D008279:Magnetic Resonance Imaging D008297:Male D018317:Nerve Sheath Neoplasms D009443:Neuritis D009883:Ophthalmic Solutions D016896:Treatment Outcome D014276:Trigeminal Nerve
neuritis horse trigeminal nerve MRI