Ketz C J, Radlinsky M, Armbrust L, Carpenter J W, Isaza R
Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas 66506, USA.
J Zoo Wildl Med. 2001 Jun;32(2):268-72. doi: 10.1638/1042-7260(2001)032[0268:PRAAAA]2.0.CO;2.
A 3-mo-old male white Bengal tiger (Panthera tigris) presented with the chief complaint of regurgitation of solid food since weaning at 2 mo of age. Compared with its littermates, the tiger was in poor body condition and weighed only 10.3 kg when its littermates were estimated at 20-25 kg. Thoracic radiographs showed a megaesophagus cranial to the heart base. A contrast esophagram more clearly outlined the megaesophagus, and fluoroscopy demonstrated normal motility of the caudal esophagus. Endoscopic examination revealed a structure coursing dorsally from right to left over the esophagus and a constrictive band on the left of the esophagus at the heart base. Nonselective angiography confirmed the presence of a persistent right aortic arch, as well as an aberrant left subclavian artery. A left fourth intercostal thoracotomy was performed, and the ligamentum arteriosum was double ligated and divided. The left subclavian artery did not cause significant compromise of the esophagus and was not manipulated at surgery. The tiger recovered well from anesthesia and surgery. Solid food was slowly introduced over a 2-mo period without any regurgitation. The cub gained weight rapidly after surgery.
一只3个月大的雄性白色孟加拉虎（Panthera tigris），主要症状为自2个月龄断奶后出现固体食物反流。与同窝幼崽相比，这只老虎身体状况不佳，体重仅10.3千克，而其同窝幼崽估计体重在20至25千克。胸部X光片显示心脏基部上方有巨食管。食管造影更清晰地勾勒出巨食管，透视显示食管尾部蠕动正常。内镜检查发现一个结构从食管右侧背侧向左走行，以及心脏基部食管左侧的一条狭窄带。非选择性血管造影证实存在持续右主动脉弓以及异常左锁骨下动脉。进行了左侧第四肋间开胸手术，动脉韧带双重结扎并切断。左锁骨下动脉未对食管造成明显压迫，手术中未对其进行处理。老虎从麻醉和手术中恢复良好。在2个月的时间里缓慢引入固体食物，未出现任何反流。这只幼崽术后体重迅速增加。
