Computed tomography (CT) features in patients with eosinophilic granulomatosis with polyangiitis at diagnosis (n=136)
| Chest CT feature | Number present | Feature present but not important | Moderately important feature | Prominent feature |
| Nodules (up to 30 mm) | 15 (11%) | 12 (9%) | 2 (1%) | 1 (1%) |
| Micronodules (<3 mm) | 32 (24%) | 19 (14%) | 9 (5%) | 4 (2%) |
| Centrilobular small nodules (<10 mm) | 19 (14%) | 11 (8%) | 5 (4%) | 3 (2%) |
| Ground-glass opacity | 53 (39%) | 20 (15%) | 27 (20%) | 6 (4%) |
| Consolidation | 38 (28%) | 9 (7%) | 17 (12%) | 12 (9%) |
| Mass (>30 mm) | 7 (5%) | 2 (1%) | 2 (1%) | 3 (2%) |
| Halo sign | 5 (2%) | 4 (2%) | 1 (1%) | 0 |
| Reversed halo sign | 1 (1%) | 1 (1%) | 0 | 0 |
| Branching opacities (V- or Y-shaped) | 16 (12%) | 9 (7%) | 7 (5%) | 0 |
| Tree in bud | 13 (10%) | 9 (7%) | 4 (3%) | 0 |
| Mosaic attenuation (inspiration) | 5 (4%) | 3 (2%) | 1 (1%) | 1 (1%) |
| Air trapping (expiration) | 5 (4%) | 5 (4%) | 0 | 0 |
| Bronchial dilatation | 21 (15%) | 14 (8%) | 7 (5%) | 0 |
| Bronchial wall thickening | 43 (32%) | 28 (21%) | 13 (8%) | 2 (1%) |
| Traction bronchiectasis | 4 (3%) | 4 (3%) | 0 | 0 |
| Mucous plugging | 12 (9%) | 8 (6%) | 4 (3%) | 0 |
| Interlobular septal thickening | 15 (11%) | 10 (7%) | 4 (3%) | 1 (1%) |
| Pleural effusion | 17 (12%) | 6 (4%) | 9 (7%) | 2 (1%) |
| Pericardial effusion | 11 (8%) | 6 (4%) | 4 (3%) | 1 (1%) |
| Nodal enlargement >10 mm (mediastinal, hilar) | 23 (17%) | 16 (12%) | 7 (5%) | 0 |
| Distribution of lesions | ||||
| Peribronchovascular | 23 (17%) | |||
| Migratory infiltrates | 12 (9%) | |||
| Other | 101 (74%) | |||
| Predominant pattern | ||||
| Airspace pattern | 41 (30%) | |||
| Airway pattern | 20 (15%) | |||
| Mixed pattern | 14 (10%) | |||
| Undeterminate | 61 (45%) |