10 year old Husky

Findings

There is marked ventral and leftward displacement of the trachea. Both the cranial and caudal mediastinum is widened on the d/v projection.
There is near complete lysis of the right 4th rib, visible on the lateral and v/d projections. The pleura of the right hemithorax appears irregular, resulting in an undulating lung border on that side, overlying the 5th , 6th, and 7th ribs. The 3rd-5th ribs on the right are widened and displaced.
There is moderate pleural effusion and air bronchograms on the left lateral projection, indicating atelectasis or infiltration of the right cranial and right middle lung lobes.