From: Protective reactive thymus hyperplasia in COVID-19 acute respiratory distress syndrome
0 | Absent or minor pulmonary parenchymal changes |
1 | Limited ground-glass opacities |
2 | Bilateral ground-glass opacities < 50% of pulmonary parenchyma |
3 | Idem 2, with superimposed inter/intra lobular septal thickening, i.e. ‘crazy paving’ |
4 | Bilateral ground-glass opacities > 50% of pulmonary parenchyma |
5 | Idem 4, with superimposed ‘crazy paving’ |
6 | Idem 5, with pulmonary fibrosis |