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- Title
MEGAESÔFAGO CONGÊNITO EM CÃO -- RELATO DE CASO.
- Authors
Flores Coleto, Arlinda; Fernandes Gundim, Lígia; Tivelli, Patrícia; Szabó, Matias Pablo Juan; Medeiros-Ronchi, Alessandra Aparecida
- Abstract
The aim of this study was to report the case of a two-month-old mixed-breed dog treated at the Veterinary Hospital of the Federal University of Uberlândia (UFU) with a history of progressive weight loss, diarrhea and vomiting. On clinical examination, pale mucous membranes and a grade IV murmur were observed in the mitral focus. Simple and contrasted radiographic examinations were performed and, subsequently, the diagnosis of megaesophagus was assigned. Due to further complications, the animal was euthanized and sent to the Department of Animal Pathology - UFU. At necropsy, a cylindrical white cord originating from the heart, compressing the trachea and esophagus, was visualized. Above it, esophageal dilation with the presence of milky liquid was observed. Megaesophagus was attributed to persistent right aortic arch (PRAA). PRAA is considered the most common vascular ring alteration in dogs. In young animals, it is characterized by being the main cause of dysphagia and esophageal dilations. During embryogenesis, several vascular structures are formed, including the aortic arches. Under physiological conditions, the left aortic arch persists at birth and gives rise to the descending aorta. If the right aortic arch does not regress, it is this that will give rise to the aorta, positioning itself to the right of the esophagus and trachea. The ductus arteriosus that regresses at the end of fetal formation in ligamentum arteriosum, passes through the esophagus, causing compression at the level of the cardiac base and cranial dilation of the organ. Although uncommon, congenital megaesophagus due to PRAA should be considered as a differential diagnosis in the case of young dogs with dysphagia. Congenital alterations of the vascular rings, if not corrected, have an unfavorable prognosis.
- Subjects
THORACIC aorta; PUBLIC hospitals; SKULL base; AUTOPSY; ESOPHAGEAL achalasia; DUCTUS arteriosus
- Publication
Revista Foco (Interdisciplinary Studies Journal), 2023, Vol 16, Issue 2, p1
- ISSN
1981-223X
- Publication type
Article
- DOI
10.54751/revistafoco.v16n2-029