NAVLE（北美执业兽医考题）Day 794

A 7-year old male castrated cat presents for respiratory distress with open-mouth breathing. You initially place him in oxygen and obtain thoracic radiographs when he is stabilized. The films are shown here. What is your diagnosis?
一只7岁已绝育公猫由于呼吸窘迫，张口呼吸前来就诊。你马上把他放到氧仓内吸烟，待稳定后拍摄的胸腔X光片如下图。里的诊断是什么？