In NSIP the predominant finding on HRCT is subpleural, patchy, ground-glass opacification [18] . Traction bronchiectasis, subpleural microcystic honeycombing and irregular linear opacities can be seen in more advanced cases. On histology, homogeneous interstitial inflammation is seen, corresponding to the diffuse ground-glass opacities, whereas fibrosis in the interstitium is related to the superimposed linear pattern (Fig. 5c) [19] .