title: Esophageal obstruction caused by a left aortic arch and an anomalous right patent ductus arteriosus in two German Shepherd littermates.
abstract: OBJECTIVE
  To present details of surgical management of an unusual vascular ring anomaly in two German Shepherd littermates.
  
  
  METHODS
  Clinical case report.
  
  
  METHODS
  Three-month-old intact male and female German Shepherd littermates.
  
  
  RESULTS
  In each dog, the esophagus was obstructed by a vascular ring comprised of the left aortic arch, an anomalous patent right ductus arteriosus, and the pulmonary artery ventrally. Surgical treatment consisted of dividing and oversewing the patent right ductus arteriosus. Neither dog has clinical signs of esophageal disease one year after treatment.
  
  
  CONCLUSIONS
  This vascular ring anomaly should be considered a possibility in any young dog with esophageal obstruction and a machinery murmur.
authors.affiliation: Department of Clinical Studies, University of Pennsylvania School of Veterinary Medicine, Philadelphia 19104-6010, USA.
authors.forename: D
authors.initials: D
authors.lastname: Holt
authors.forename: E
authors.initials: E
authors.lastname: Heldmann
authors.forename: K
authors.initials: K
authors.lastname: Michel
authors.forename: J W
authors.initials: JW
authors.lastname: Buchanan
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001013:Aorta, Thoracic / Q000002:abnormalities*; D004285:Dogs / Q000002:abnormalities* / Q000601:surgery*; D004374:Ductus Arteriosus, Patent / Q000150:complications / Q000601:surgery / Q000662:veterinary*; D004940:Esophageal Stenosis / Q000209:etiology / Q000601:surgery / Q000662:veterinary*; D005260:Female; D008297:Male; D011182:Postoperative Care / Q000662:veterinary