Metastatic malignant nerve sheath tumour in a dog

Abstract A 5‐year‐old, male, English Cream Golden Retriever dog with a 3‐month history of left thoracic limb lameness was presented to the University of Georgia Veterinary Teaching Hospital. Physical examination was unremarkable. Neurological examination indicated a left peripheral C6‒T2 lesion, but further diagnostics were declined in favour of empirical treatment with corticosteroids. Two months later, the patient had not improved, and a palpable mass was found in the left axilla on physical examination. Due to poor prognosis, euthanasia was elected. Postmortem MRI revealed a left brachial plexus mass extending up the left C7 spinal nerve into the spinal cord. At necropsy, pulmonary metastasis was found. A malignant nerve sheath tumour was diagnosed via histopathology.