US – The thorax in this patient presented a large amount of pleural effusion and a mixed, hypoechoic, cranial mediastinal mass that measured approximately 5.0 cm. No air entrapment was noted in the periphery of the mass, which would mean that this is likely of lymph node origin. The heart was volume contracted and displaced to the right. Ill defined pleural changes were noted with other lymph nodes that were mildly enlarged, hypoechoic and irregular. Thoracic rads – The chest volume is large, the intercostal spaces are widened, the diaphragmatic cupola reveals caudal displacement. A large soft tissue opaque cranioventral mediastinal mass effect is border effacing with the heart. The cardiac silhouette is obscured, however it appears to be displaced caudally. The carina reveals caudal displacement as well. The trachea is elevated by the ventrally located mass effect. Moderate bilateral pleural effusion is noted and recognized by rounded, retracted lung lobes, widening and soft tissue opacity of the pleural spaces and pleural fissure lines. The lung is dispaced caudally and laterally. The right cranial lobe presents a lobar alveolar pattern with an airbronchogram and trapped peripheral air.