Axial CT without contrast of the chest (above) shows an ill-defined solid soft tissue mass in the posterior and medial aspect of the left lower lobe. CXR AP (below left) shows a double density sign projecting to the left of the spine over the medial aspect of the cardiac silhouette. AP image from the arterial phase of an angiogram (below right) shows the left lower lobe mass has an arterial supply arising from the subdiaphragmatic aorta.
