Cervical intradural‐extramedullary ganglioneuroma in a dog

Abstract This case report describes an intradural‐extramedullary spinal ganglioneuroma in a 4‐year‐old French bulldog with a 2‐month history of cervical hyperaesthesia. Magnetic resonance imaging revealed a well‐defined dorsolateral intradural‐extramedullary lesion at C1–C2, T2‐weighted hyperintense and T1‐weighted hypointense. On computed tomography, it was iso‐ to hypoattenuating. Both imaging modalities demonstrated marked contrast enhancement. Subtotal surgical resection was performed. Histopathological and immunohistochemical analyses were compatible with ganglioneuroma. The dog recovered uneventfully. Follow‐up magnetic resonance imaging at 7 months showed mild tumour remanence and possible slow regrowth, without neurological deficits. Nine months postoperatively, the dog remains neurologically normal. This is the first report of an intradural‐extramedullary cervical spinal ganglioneuroma in a dog, including its magnetic resonance imaging, computed tomography and immunohistochemical features. While uncommon, spinal ganglioneuroma should be considered in the differential diagnosis for lesions with these imaging characteristics. Surgical excision, even when subtotal, is associated with a favourable short‐ and long‐term outcome.