A 12-year old, female neutered English Pointer presented with right-sided temporalis muscle atrophy and facial irritation over 2 weeks. Neurolocalisation was consistent with a right trigeminal neuropathy. MRI revealed a severely enlarged trigeminal nerve with involvement of the infraorbital nerve, which was palpable as a firm swelling over the maxilla. Incisional biopsy of the infraorbital nerve was performed and histopathological diagnosis was a malignant Schwannoma. Palliative chemotherapy was initiated. Two months following diagnosis the owner reported that the dog was doing well. This is the first report of a trigeminal nerve sheath tumour diagnosed via biopsy of the infraorbital nerve in a dog. Consideration should be given to evaluating the infraorbital nerve on clinical examination as well as MRI in cases of trigeminal neuropathy.
- trigeminal neuropathy
- cranial nerve
- peripheral nerve
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Contributors All authors were involved in the work-up, investigation, interpretation of diagnostic test results and write-up of this study.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Data availability statement All data relevant to the study are included in the article.
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