A chest radiograph and CT were undertaken. The chest radiograph showed an area of consolidation in the right lung with an air bronchogram. There was also loss of volume of the right lung (Fig. 6a) . CT showed a decrease in the size of the tumour consistent with response to therapy. There was a patchy distribution of a crazy-paving pattern with ground-glass opacities and thickening of the interlobular and intralobular septa (Fig. 6b) .