NAVLE（北美执业兽医考题）Day 492

An 11 year old male neutered dog is presented with a 4 week history of worsening problems with urination. The dog appears to have abdominal pain and strains to urinate a small volume of reddish urine. Urinalysis: USG=1.028, 15-20 WBC, RBC +++, protein +, bacterial rods +++. A pneumocystogram radiograph looks like this. Which one of the following choices is the most likely diagnosis?

一只11岁的已绝育公犬由于持续4周并且越来越严重的泌尿道问题前来就诊。该犬腹部疼痛，排尿困难，尿少并且尿色发红。尿检：USG=1.028,15-20WBC，RBC+++，蛋白+，杆菌+++。膀胱充气造影如下图。以下哪个选项是最可能的诊断？