Metastatic extradural melanoma of the lumbar spine in a cat

Author:

Fert Sabrina1ORCID,River Pablo2,Bondonny Laura2,Cauzinille Laurent1

Affiliation:

1. Department of Neurology Veterinary Hospital Center Frégis Gentilly France

2. Department of Surgery Veterinary Hospital Center Onlyvet Saint Priest France

Abstract

AbstractA 7‐year‐old neutered male Domestic shorthair cat, with a 1.5‐year history of left eye enucleation secondary to a diffuse iris malignant melanoma, was evaluated for progressive onset of pelvic limb paresis and ataxia with severe thoracolumbar hyperaesthesia and dysorexia. Neurological examination localised a lesion to the T3–L3 spinal cord segments. Magnetic resonance imaging of the thoracolumbar spine showed a well‐defined extradural T1‐weighted hyperintense non‐contrast‐enhancing mass, initially suggesting a potential haemorrhagic component. Exploratory surgery revealed a brownish extradural lumbar mass. Histologic examination concluded to a melanoma, most probably metastatic given the animal's previous medical history. This report highlights the importance of collecting a complete medical history, which can help in obtaining a preliminary differential diagnosis in cats with clinical signs of myelopathy. Although the location of this metastasis is particularly unusual both in human and veterinary medicine, making optimal treatment challenging for neurosurgeon, our increased understanding of immune and tumour cell biology during the past decade is likely to improve the future treatments of feline melanoma and its metastases.

Publisher

Wiley

Subject

General Veterinary

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