title: Left aortic arch and right ligamentum arteriosum causing esophageal obstruction in a dog.
abstract: A 10-week-old, mixed-breed dog was examined because of persistent regurgitation. Results of thoracic radiography and fluoroscopy of the esophagus, using a liquid suspension of barium sulfate, were suggestive of a vascular ring anomaly. During left lateral thoracotomy, a left aortic arch was identified, but the cause of the esophageal obstruction could not be determined. Results of endoscopic examination of the esophagus suggested a compressive lesion originating from the right side of the esophagus. An anomalous artery could not be identified on an aortogram. Post-mortem examination revealed a left aortic arch and right ligamentum arteriosum that were causing the esophageal obstruction.
authors.affiliation: Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, Texas A&M University, College Station 77843-4474.
authors.forename: K
authors.initials: K
authors.lastname: Hurley
authors.forename: M W
authors.initials: MW
authors.lastname: Miller
authors.forename: M D
authors.initials: MD
authors.lastname: Willard
authors.forename: H W
authors.initials: HW
authors.lastname: Boothe
mesh_terms: D000818:Animals; D001013:Aorta, Thoracic / Q000002:abnormalities* / Q000000981:diagnostic imaging; D000013:Congenital Abnormalities / Q000000981:diagnostic imaging / Q000662:veterinary; D004108:Dilatation, Pathologic / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology / Q000662:veterinary; D004283:Dog Diseases / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D004285:Dogs; D004935:Esophageal Diseases / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology / Q000662:veterinary*; D004947:Esophagus / Q000000981:diagnostic imaging; D005260:Female; D008022:Ligaments / Q000002:abnormalities*; D011651:Pulmonary Artery / Q000002:abnormalities*; D011859:Radiography