Chest CT (axial view) with parenchymal (a, c and d) and mediastinal windows (b). a) Upper lung fields: infiltrate with pseudonodular aspect, surrounded.

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Chest CT (axial view) with parenchymal (a, c and d) and mediastinal windows (b). a) Upper lung fields: infiltrate with pseudonodular aspect, surrounded by a ground-glass halo (red arrow) and axillar lymph nodes (green arrows). b) Middle lung fields: mediast... Chest CT (axial view) with parenchymal (a, c and d) and mediastinal windows (b). a) Upper lung fields: infiltrate with pseudonodular aspect, surrounded by a ground-glass halo (red arrow) and axillar lymph nodes (green arrows). b) Middle lung fields: mediastinal lymph nodes (green arrow). c and d) Lower lung fields: infiltrates with pseudonodular aspect with a tendency toward confluence (red arrows), interlobular interstitial thickening (orange arrow) and pleural effusion (blue arrows). Giorgio Castellana et al. Breathe 2017;13:317-322 ©2017 by European Respiratory Society