Lissencephaly and cerebellar hypoplasia in a goat

A case of lissencephaly and cerebellar hypoplasia was observed in a 30-day-old goat. The goat presented with sternal recumbence, absence of a menace response, intention tremors, ataxia, and nystagmus. The goat was euthanized and necropsied after having been hospitalised for eleven days. At necropsy,...

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Bibliographic Details
Published in:Ciência rural Vol. 43; no. 10; pp. 1858 - 1861
Main Authors: Santos, José Rômulo Soares dos, Dantas, Antônio Flavio Medeiros, Pessoa, Clarice Ricardo Macedo, Silva, Tatiane Rodrigues, Simões, Sara Vilar Dantas, Correa, Franklin Riet, Pedrosa, Daniel
Format: Journal Article
Language:English
Published: Universidade Federal de Santa Maria 01-10-2013
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Summary:A case of lissencephaly and cerebellar hypoplasia was observed in a 30-day-old goat. The goat presented with sternal recumbence, absence of a menace response, intention tremors, ataxia, and nystagmus. The goat was euthanized and necropsied after having been hospitalised for eleven days. At necropsy, the surface of the brain was found to be smooth, the cerebral sulci and gyri were absent, and the cerebellum was reduced in size. Histologically, the grey matter and white matter were thicker and thinner than normal in cortices, respectively. The neurons were randomly arranged in the grey matter. In the cerebellum, the layers were disorganised, and cells were heterotopics. The histologic and gross lesions observed in this animal are characteristic of lissencephaly associated with cerebellar hypoplasia. The presence of a single goat affected suggests that the malformation was not of infectious origin and because lissencephaly is a malformation not previously described in goats, it is unlikely this case was inherited. Um caso de lisencefalia e hipoplasia cerebelar é descrito em um caprino com 30 dias de idade. No exame físico, apresentava decúbito esternal permanente, ataxia, ausência do reflexo de ameaça, tremores de intenção e nistagmo. Após 11 dias de internamento, o caprino foi eutanasiado e necropsiado. Na necropsia, o cérebro não apresentava giros nem sulcos e o cerebelo estava reduzido de tamanho. Histologicamente, em todo o córtex cerebral, a substância cinzenta estava mais espessa e a substância branca mais fina que o normal. Os neurônios estavam distribuídos de forma aleatória na substância cinzenta. No cerebelo, as camadas estavam desorganizadas, com localização heterotópica das células. Os achados macroscópicos e histológicos são característicos de lisencefalia e hipoplasia cerebelar. A presença de um só animal afetado sugere que a malformação não é de origem infecciosa e o fato da lisencefalia nunca ter sido descrita antes em caprinos sugere que não é uma doença hereditária.
ISSN:0103-8478
1678-4596
0103-8478
DOI:10.1590/S0103-84782013001000020