Vascular Ring Anomaly Associated with Right Aortic Arch in a German Shepherd Dog

A 12-week-old, intact, male German shepherd dog was presented with a history of regurgitation since weaning to solid food. The dog was emaciated, and the cervical esophagus of the animal was palpable as a flaccid and air-filled cavity. Contrast radiography of esophagus revealed contrast material accumulation in the thoracic esophagus craniodorsal to the heart. A diagnosis of vascular ring anomaly was made and surgical correction of the defect was decided. The dog died during the preoperative period despite supportive treatment in intensive care unit. Necropsy findings confirmed a diagnosis of persistent right aortic arch.