Muscular and collagenous cerebellar choristoma in a dog

• Published in: Journal of veterinary science (Suwŏn-si, Korea) Vol. 23; no. 2; pp. 30.1 - 30.6
• Main Authors: Ripplinger, Angel, de Melo, Stella Maris Pereira, Ferrarin, Denis Antonio, Schwab, Marcelo Luis, Wrzesinski, Mathias Reginatto, Rauber, Julia da Silva, Flores, Mariana Martins, Kommers, Glaucia Denise, Mazzanti, Alexandre
• Format: Journal Article
• Language: Korean
• Published: 2022
• Subjects: Choristoma; immunohistochemistry; dog; cerebellum; neuropathology
• ISSN: 1229-845X; 1976-555X

This report aims to describe the first case of muscular and collagenous choristoma in a dog. A 10-yr-old female mixed-breed dog presented with lateral recumbence, vocalization, positional vertical nystagmus, divergent strabismus, anisocoria, and status epilepticus. The clinical condition evolved to stupor and ultimately, death. Necropsy revealed a white mass causing an irregular increase in the volume of the cerebellar vermis. In histological analysis, a well circumscribed, unencapsulated mass was observed in the cerebellum, consisting of fibers of striated skeletal muscle and collagen fibers, mostly mineralized. Based on the histopathological and histochemical findings, a diagnosis of muscular and collagenous cerebellar choristoma was made.