Today’s case is a 7 year old male neutered domestic short haired cat. He presents with vomiting for one month, and lethargy and difficulty breathing for one week. What is your interpretation?
There is a small amount of pleural effusion causing widened fissure lines and retraction of the lung lobes. There is focal widening of the cranial mediastinum on the ventrodorsal projection, which is apparent as a soft tissue opacity flattining the margin of the cranial lung lobe on the lataral projection. The trachea is mildly elevated and narrowed in this area.
The radiographic findings are consistent with a mediastinal mass and pleural effusion. The mass may be compressing the trachea and/or esophagus, and contributing to pleural effusion.
Differential diagnoses include lymphoma, thymoma, ectopic thyroid tissue, mediastinal cyst. Recommend thoracic ultrasound and possible fine needle aspirate.
- On ultrasound examination, there was a small volume of pleural effusion. A complex multi-lobular mass was visible in the cranial mediastinum surrounding the cranial mediastinal vasculature and the sternal segments. This mass tracked caudally along the pleura to the level of the cardiac apex.