Today’s case is a 12 year old male neutered Domestic Shorthair cat with anorexia and increased respiratory effort for 3 days. What is your radiographic diagnosis?
The cardiac silhouette is markedly enlarged on all projections. There is a bulge in the region of the carina and at the base of the right middle lung lobe, which is increased in opacity. The pulmonary vasculature is enlarged. There is a diffuse bronchointerstitial pattern throughout the lungs, and there is increased opacity in the region of the left cranial lung lobe.
Cardiomegaly is most likely due to cardiomyopathy due to primary heart disease or hyperthyroidism. The mass effect in the right cranial thorax may be a pulmonary mass with secondary right middle lobe atelectasis or an enlarged cardiac chamber. The diffuse bronchointerstitial pattern is consistent with lower airway disease, which may have infectious and noninfectious inflammatory components. The opacity in the left cranial thorax may be due to effusion or a cranial thoracic mass.
- Hypertrophic cardiomyopathy
- Ruled out thoracic mass by ultrasound examination – enlarged atrium
- No abnormalities in left cranial thorax