title: Double aortic arch in a dog (Canis familiaris): a case report.
abstract: We herein report a case of a double aortic arch in a 10-week-old male dog of no defined race, which presented episodes of regurgitation at the time of weaning. This vascular malformation was characterized by the persistence of two aortic arches, right and left, of varying dimensions. The right aortic arch was observed to be larger. During post mortem examination the vessels of the animal were injected with coloured latex bi-centrifuged CIS 1-4 polisopreno which revealed the patency of the two aortic arches. Concomitantly, dilation of the cranial oesophagus causing constriction was observed, indicating megaesophagus. Apart from the constriction, the oesophagus presented normal morphometric parameters in relation to its dimensions.
authors.affiliation: Health Sciences Institute (UNIP), Veterinary Medicine College, Sâo Paulo University (USP), Brazil.
authors.forename: C R
authors.initials: CR
authors.lastname: Ferrigno
authors.forename: A A
authors.initials: AA
authors.lastname: Ribeiro
authors.forename: S C
authors.initials: SC
authors.lastname: Rahal
authors.forename: A M
authors.initials: AM
authors.lastname: Orsi
authors.forename: E T
authors.initials: ET
authors.lastname: Fioreto
authors.forename: M F
authors.initials: MF
authors.lastname: Castro
authors.forename: M R
authors.initials: MR
authors.lastname: Mchado
authors.forename: F
authors.initials: F
authors.lastname: Singaretti
authors.forename: C
authors.initials: C
authors.lastname: Ricardo
authors.forename: A
authors.initials: A
authors.lastname: Augusto
authors.forename: S
authors.initials: S
authors.lastname: Canavese
authors.forename: A
authors.initials: A
authors.lastname: Marcos
authors.forename: E
authors.initials: E
authors.lastname: Ticona
authors.forename: M
authors.initials: M
authors.lastname: Fernandes
authors.forename: M
authors.initials: M
authors.lastname: Rita
authors.forename: F
authors.initials: F
authors.lastname: Singareti
mesh_terms: D000818:Animals; D001013:Aorta, Thoracic / Q000002:abnormalities* / Q000473:pathology; D018376:Cardiovascular Abnormalities / Q000473:pathology / Q000662:veterinary*; D004285:Dogs / Q000002:abnormalities*; D008297:Male