Fig. 2

Examples of the ILA scoring. Axial CT images of three patients with lung cancer (arrows). a, b A 74-year-old male affected by squamous cell carcinoma of 2.5 cm in the left upper lobe (arrow). There was no interstitial lung abnormality (ILA; ILA score = 0). c, d A 64-year-old female affected by squamous cell carcinoma of 1.2 cm in the right lower lobe (arrow). The arrowheads demonstrate subpleural ground-glass opacity in less than 5% of the lung. The ILA score was 1 (equivocal for ILA) because it was unclear whether the finding was only dependent opacity or contained ILA. e, f A 84-year-old female affected by squamous cell carcinoma of 2.5 cm in the right lower lobe (arrow). The arrowheads point to subpleural ground-glass opacity and reticulation. These findings were seen in not only the dependent area but also in the ventral side. The ILA score was 2 (considered as ILA definitely)