NAVLE（北美执业兽医考题）Day 515

单选题，正确答案是100分，非正确答案为0分，Good Luck！

Q1:A nine-year-old Irish setter is presented for vomiting.The owner states that the dog does not really retch, but just spits up food soon after eating. The dog is normal otherwise. Based on the lateral radiograph below, which one of the following choices is the most likely diagnosis?一只9岁的爱尔兰塞特犬表现呕吐。畜主说狗并不是真正的呕吐，只是在吃完东西不久后立即吐出食物。狗的其他方面是正常的。根据下面的侧位片，下列哪一项是最可能的诊断？[图片]

A - Persistent right aortic arch 出现右主动脉弓

B - Megaesophagus 巨食管症

C - Pulmonary bullae 肺大疱

D - Mediastinal mass 纵隔肿瘤

E - Gastric foreign body 胃异物

NAVLE（北美执业兽医考题）Day 515

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