Axial chest CT images show a regularly shaped air loculation, with an obtuse angle between the cystic wall and pleura (length ten cm and anterior-posterior diameter 4 cm). The top and bottom portion of the cystic lesion continues to the right major fissure. Sagittal CT images show the anteroinferior portion of the localised air loculation tapers into the right major fissure. Small blebs are also visible on the right adjacent to the aforementioned air loculation. There are initial signs of centrilobular emphysema in the upper lobes. Mediastinum is normal.