Today’s case is an 8-year-old female neutered terrier mix with chronic cough and respiratory distress. History of lifelong respiratory problems. What are your findings?
There is an alveolar pulmonary pattern with air bronchograms in the dependent portions of the right cranial, right middle, and left cranial lung lobes. The bronchi to these lung lobes are widened and irregular, and do not taper in the periphery. There is a diffuse bronchointerstitial pattern in the caudal lung lobes. The accessory lung lobe is hyperinflated with a thin soft tissue opacity wall and no discernible internal parenchyma. In the portion of the abdomen included, the liver is enlarged.
Abscess, bulla, or cyst of the accessory lung lobe, likely secondary to chronic lower airway disease. Bronchiectasis and pneumonia.
A cystic transformation of the accessory lung lobe was confirmed on CT examination. The lung lobe was removed, and histopathology showed severe bronchiectasis in the remaining tissue and large cystic cavity representing lung lobe with loss of internal structure secondary to inflammation.