Papiloma de plexo coroide em um cão

Choroid plexus papilloma in a dog

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.creatorHeckler, Marta Cristina Thomas [UNESP]
dc.creatorCagnini, Didier Quevedo [UNESP]
dc.creatorRamos, Renata dos Santos
dc.creatorMachado, Luiz Henrique de Araújo [UNESP]
dc.date2016-04-01T18:43:51Z
dc.date2016-04-01T18:43:51Z
dc.date2013
dc.date.accessioned2023-09-12T09:12:47Z
dc.date.available2023-09-12T09:12:47Z
dc.identifierhttp://www.ufrgs.br/actavet/41-suple-1/041-s1.htm
dc.identifierActa Scientiae Veterinariae, v. 41, n. 13, p. 1-7, 2013.
dc.identifier1679-9216
dc.identifierhttp://hdl.handle.net/11449/137030
dc.identifierISSN1679-9216-2013-41-13-01-07.pdf
dc.identifier1694600251341732
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8786271
dc.descriptionBackground: Choroid plexus tumors are uncommon neoplasms derived from the neuroepithelium that covers the ventricular cavity and the central canal of the spinal cord that are characterized by papillar aspect and intraventricular growth. It occurs more commonly in dogs, but it has been reported in horses, cows, ferrets and is rare in cats. After the meningiomas and gliomas, choroid plexus tumors are the third encephalic tumors in dogs. In veterinary medicine, there are not many actual reports of this type of neoplasia, therefore, the aim of this paper was to report a case of a choroid plexus papilloma in a poodle dog. Case: A six year old dog, female, poodle, was admitted at the Veterinary Hospital of the São Paulo State University ‘Júlio de Mesquita Filho’ with a complaint of seizures for 15 days, blindness and head tilt to the right side. At the neurological examination, it had depression, head tilt to the right, circling and ataxia, postural reactions defi cits, absent menace response, absent light pupillary refl ex with mydriasis and augmented patellar refl ex. The patient was submitted to blood harvest to perform CBC count and biochemical profi le (renal and hepatic), which were normal. The cerebrospinal fl uid analysis presented a discrete raise of proteins. The animal was treated with phenobarbital and prednisone, under suspicion of infl ammatory disease or encephalic neoplasia. The patient developed a progressive paresis of the four limbs and the seizures remained unaltered. After approximately one month of the fi rst consultation, the dog was admitted in status epileticus, without success of control. Necropsy revealed fl attening of convolutions due to cerebral edema, dilatation of the lateral ventricles (hydrocephalus) and the presence of a greyish nodule, soft and measuring 0.6 x 0.8 cm in length coming out of the fourth ventricle and extending laterally between the cerebellum and brainstem and cranially to the thalamus. At the cut of the tissue, it presented a dark area at the region of the thalamus. Neoplastic tissue was composed of cuboidal to columnar epithelial cells with oval and regular nuclei, supported by richly vascular stroma, arranged in papillae. Discussion: Choroid plexus papillomas are tumors that originate in the choroid plexus epithelium. Affected dogs usually have six or more years, earlier than most brain tumors. However, cases have been observed in younger dogs, and dogs affected by carcinoma are generally older than those affected by the papilloma. In dogs, the tumor occurs most commonly in the fourth ventricle, as in the present report, but can also occur in the third ventricle and the lateral ventricles. The clinical signs in patients with choroid plexus tumors are varied depending on the location of the tumor in the central nervous system, but may include behavioral changes, ataxia, paresis, seizures, circling, cranial nerve and proprioceptive refl exes changes. Macroscopically, the choroid plexus papilloma is a well-defi ned mass, expansive, granular to papillary, grayishwhite to red color. Microscopically, this tumor resembles the choroid plexus and have arboriform and vascular stroma which is coated by a single layer of cuboidal to columnar epithelial cells. The fi ndings were consistent with choroid plexus papilloma located in the fourth ventricle.
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Clínica Veterinária, Faculdade de Medicina Veterinária e Zootecnia de Botucatu, Botucatu, Rubião Júnior s/n, CEP 18618-000, SP, Brasil
dc.descriptionUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Clínica Veterinária, Faculdade de Medicina Veterinária e Zootecnia de Botucatu, Botucatu, Rubião Júnior s/n, CEP 18618-000, SP, Brasil
dc.format1-7
dc.languagepor
dc.relationActa Scientiae Veterinariae
dc.relation0,144
dc.rightsAcesso aberto
dc.sourceCurrículo Lattes
dc.subjectNeoplasias
dc.subjectPapilloma
dc.subjectBrain
dc.subjectChoroid plexus
dc.subjectDogs
dc.subjectNeoplasias
dc.subjectPapiloma
dc.subjectEncéfalo
dc.subjectPlexo coroide
dc.subjectCães
dc.titlePapiloma de plexo coroide em um cão
dc.titleChoroid plexus papilloma in a dog
dc.typeArtigo


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