Fibrosarcoma in the nasal cavity of a donkey

• Autor(a) principal: Iolanda Gea Kassem
• Data de Publicação: 2018
• Outros Autores: Maristela Silveira Palhares, Natalia Bernstein, Paula Rodrigues Lopes, Patrícia de Castro Duarte, Matheus Vilardo Lóes Moreira, Fernanda Guimarães Miranda, Anelise Carvalho Nepomuceno, Renata de Pino Albuquerque Maranhão, Roselene Ecco
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMG
• Texto Completo: http://hdl.handle.net/1843/39697
• topic: skull; equine; histopathology; neoplasia; sinonasal cavities; tomography; Medicina Veterinária

Clinical and pathological findings in a case of malignant tumor located in the nasal and paranasal sinuses of a six-year-old donkey are reported. The animal was referred to the Equine Veterinary Hospital after three years of progressively increasing facial swelling. Clinically, the animal presented with tachypnea, dyspnea, and wheezing in the laryngotracheal region. There was swelling in the frontal bone and left orbital regions with exophthalmos of the left eye and bilateral mucopurulent nasal discharge, as well as retropharyngeal lymph node enlargement. Radiographic examination revealed radiopacity in the left maxillary, frontal and nasal sinuses, and in the left orbital region. Endoscopy revealed an irregular mass in the nasopharynx. Computed tomographic images of the skull showed an irregular mass, of variable density, in the rostral region, extending from the nasal cavity to the conchofrontal sinus on the left side, with dorsal displacement of the septum and dorsal nasal meatus. Loss of definition and destruction of other osseous structures of the nasal cavity and the frontal bone, and hypodense areas at the encephalic periphery were evident. Computed tomographic scans were taken to identify the localization and extension of the mass. Fibrosarcoma was confirmed on the histopathological examination for the first time in this species. The tomographic scan was considered more effective than radiography.