1.Muscular and collagenous cerebellar choristoma in a dog
Angel RIPPLINGER ; Stella Maris Pereira de MELO ; Dênis Antonio FERRARIN ; Marcelo Luís SCHWAB ; Mathias Reginatto WRZESINSKI ; Júlia da Silva RAUBER ; Mariana Martins FLORES ; Glaucia Denise KOMMERS ; Alexandre MAZZANTI
Journal of Veterinary Science 2022;23(2):e30-
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.

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