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Neoplasmas encefálicos em cães idosos / Brain neoplasms in elderly dogs

Sapin, Carolina da Fonseca; Fernandes, Cristina Gevehr; Nobre, Márcia de Oliveira; Grecco, Fabiane Borelli.
Acta Sci. vet.; 47(suppl.1): Pub. 384, 24 abr. 2019. ilus
Artigo em Português | VETINDEX | ID: vti-19572


Background: The prevalence of intracranial neoplasms in dogs represents 2.1 to 4.0% of the cases. Brain tumors may beprimary or metastatic. The objective of this study was to describe two cases of intra encephalic neoplasia in elderly dogsreceived for necropsy by the Veterinary Oncology Service in the Federal University of Pelotas.Cases: Case 1: A 12-year-old female canine, without breed and medium size, was received for necropsy. The animal hashad behavioral changes. Macroscopic examination of the encephalus revealed asymmetry and congestion. The organs werecollected and fixed in 10% formalin. In the brain cleavage we noticed an extensive brown-gray mass with reddish areas,expansive, moderately demarcated, soft to cut and discrete hydrocephalus. Serial fragments of the brain and fragmentsof the organs were sent for processing. The slides were stained with the hematoxylin and eosin technique for histopathological analysis. At the microscopic examination, cuboidal cells were observed in the encephalus sometimes in acinar arrangements, of extensive and very limited pattern, diagnosed as ependymoma. Case 2: It is a 15-year-old, female Poodledog, with several tumors. During necropsy multiple subcutaneous nodules, mesentery, intestinal serosa, stomach and liverwere noticed. At the cut these were firm and whitish. No macroscopic changes were observed in the other organs. Fragments of organs and brain were collected and a serial section of the encephalus was performed for further processing andhistological analysis. In the histopathological analysis the masses were constituted by proliferation of sometimes roundedcells, elongated, with rounded nuclei and eosinophilic cytoplasm, allowing the diagnosis of mesothelioma. The samecell pattern was observed in other organs. In the frontal cortex of the encephalus there were small foci of cells similar tothose observed in the mesentery, as well as metastatic...(AU)
Biblioteca responsável: BR68.1