6 year old Mixed Breed dog

Diagnosis

A CBC revealed peripheral eosinophilia, and a bronchial lavage was also eosinophilic. No organisms were cultured. A CT examination showed the large right caudal lung lobe mass with marked peribronchial thickening in the adjacenet tissue as well as hilar lymphadenopathy.
The dog was treated with prednisolone and the pulmonary mass,  and hilar lymphadenopathy gradually resolved over 6 months.

In the lung window, the peripheral bronchial thickening is visible in the right caudal lung lobe.

Hilar lymph node enlargement.

Poorly enhancing pulmonary mass with air bronchograms.

Recheck radiographs 4 months after initiating treatment with prednisolone showing residual interstitial opacity and bronchiectasis.