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Probable trigeminal nerve schwannoma in a dog
J H Saunders1, L Poncelet, C Clercx
1Department of Medical Imaging, Faculty of Veterinary Medicine, University of Liège, Belgium.
Summary
A Husky dog with facial pruritus and muscle atrophy was diagnosed with a trigeminal nerve schwannoma. This rare tumor affected the trigeminal nerve, impacting motor and sensory functions.
Area of Science:
- Veterinary Neurology
- Canine Oncology
- Neurosurgery
Background:
- Trigeminal nerve schwannomas are rare tumors affecting cranial nerves.
- Facial nerve dysfunction in dogs can stem from various causes, including peripheral neuropathies and central nervous system lesions.
Observation:
- A 7-year-old male Husky presented with right-sided facial pruritus and masseter muscle atrophy.
- Muscular biopsy ruled out a myogenic origin for the muscle atrophy.
- Electrophysiological studies indicated involvement of both motor and sensory fibers of the trigeminal nerve.
Findings:
- Magnetic Resonance Imaging (MRI) revealed a nodular mass in the right caudal fossa with intense contrast enhancement.
- The clinical presentation, electrophysiology, and MRI findings led to a presumptive diagnosis of trigeminal nerve schwannoma.
- Corticosteroid treatment provided slight clinical improvement.
Implications:
- This case highlights the importance of advanced diagnostic imaging and electrophysiology in diagnosing complex neurological conditions in dogs.
- Early diagnosis and understanding of trigeminal nerve schwannoma can guide treatment strategies and improve patient outcomes.
- Further research into the etiology and optimal management of canine trigeminal nerve schwannomas is warranted.