NAVLE（北美执业兽医考题）Day 730

A 6-year old male neutered domestic shorthair cat is presented with 4-month history of weight loss and regurgitating undigested food immediately after eating.
Which one of the following abnormalities is apparent on the patient's radiographs?
一只6岁的雄性已绝育家养短毛猫由于持续4个月的餐后立刻呕吐出未消化的食物以及体重下降前来就诊。该动物的x光片上提示以下哪种异常？