Cutaneous Heterotopic Brain Tissue (Neuroglial Choristoma) with Dysplastic Features in a Kitten.
A 3-month-old, male European shorthair kitten exhibited an ill-defined, soft mass on the skin of the frontal head, which was present since birth. The surgically resected tissue was representative of a discrete dermal and subcutaneous mass comprising islands of neurons, glial and meningothelial elements, sometimes atypical or dysplastic, separated by dense collagenous connective tissue. There was no evident connection between this tissue and the brain. Immunohistochemical examination confirmed the presence of neurons and a pleocellular glial population, supporting a diagnosis of cutaneous neuroglial choristoma believed to be secondary to sequestered (resolved) meningoencephalocoele. Ectopic brain tissue is very rare in small animals. Some atypical features displayed by this tissue may be misdiagnosed as neoplasia. Communication between surgeon and pathologist to clarify the relationship of the lesion to surrounding structures is helpful to avoid misdiagnosis.
Servicio de Diagnóstico Anatomopatológico Veterinario HISTOVET, Avda. Països Catalans 12D, Sant Quirze del Vallès, Barcelona, Spain. Electronic address: gramirez@histoweb.com.
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Ramírez
Section of Veterinary Pathology, School of Veterinary Science, Leahurst, University of Liverpool, Chester High Road, Neston, UK.
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Ressel
Servicio de Diagnóstico Anatomopatológico Veterinario HISTOVET, Avda. Països Catalans 12D, Sant Quirze del Vallès, Barcelona, Spain.
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Altimira
Servicio de Diagnóstico Anatomopatológico Veterinario HISTOVET, Avda. Països Catalans 12D, Sant Quirze del Vallès, Barcelona, Spain.
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Vilafranca
D000818:Animals; D001921:Brain; D002415:Cats; D002828:Choristoma / Q000662:veterinary*; D008297:Male; D012871:Skin Diseases / Q000662:veterinary*
brain; cat; choristoma; skin