12 year old German Shepherd cross

Findings

On all three radiographic projections, there is a cavitary mass in the right caudal lung lobe. It is best seen on the left lateral projection and contains soft tissue opacity as well as gas lucency. On the d/v projection, the soft tissue opacity is on the lateral side of the lesion, indicating that it may be tissue rather than fluid. The remainder of the thorax appears normal.

CT images in a lung and soft tissue window are available. The mass is cavitary and contained within the right caudal lung lobe. The contents are soft tissue with mineralized material and a small fluid component, as evidenced by the horizontal gas fluid interface in the lower right portion of the mass.