Figure 2. (a) Non-enhanced CT scan at the level of the heart showing a thick-walled, well-encapsulated pleural-based mass containing mixed high- and low-attenuation contents with gas bubbles in the centre, having the so-called spongiform appearance. (b) Non-enhanced CT scan with lung-window setting at the lower level revealing tubular bronchiectatic change with bronchovascular crowding in the adjacent left lower lobe. Note old depressed rib fractures and scar at the left chest wall. (c) Coronal reformation of enhanced CT showing marked enhancement of the wall of the mass. Gas collections in the central part of the mass account for an unusual striped appearance seen on the lateral chest radiograph.