Online Resource 1. The final diagnoses of patients with “indeterminate” and “atypical” chest CT findings
Chest CT findings
Indeterminate Atypical
- Single, peripheral GGO (with or without consolidation);
- Single, round GGO (with or without consolidation)
- Diffuse, multifocal, perihilar or unilateral GGOs with or without consolidation;
- Few, very small GGOs with a non- rounded and non-peripheral distribution
- Isolated segmental or lobar consolidation without GGO;
- Centrilobular small nodules (“tree in bud”);
- Lung cavitation;
- Smooth interlobular septal thickening with pleural effusion
Final diagnoses Count Percent (%)* Count Percent (%)* Count Percent (%)*
- Covid-19 64 87.7 13 14.4 - -
- Lobar-segmental pneumonia - - - - 54 35.1
- Other pneumonias 7 9.6 40 44.4 - -
- Alveolar edema - - 22 24.4 - -
- Interstitial edema - - - - 45 29.2
- Aspiration pneumonia - - 6 6.7 1 0.6
- Alveolar haemorrhage 1 1.4 3 3.3 - -
- Small airway disease - - 2 2.2 51 33.1
- Pulmonary infarct 1 1.4
- Radiation pneumonitis - - 1 1.1 - -
- Connective tissue disease - - 1 1.1 - -
- Hypersensitivity pneumonitis - - 1 1.1 - -
- Lung cancer - - 1 1.1 3 1.9
CT: Computed tomography, GGO: Ground-glass opacity, * Column percentage
