Subpleural basal predominance | Subpleural basal predominance | Upper or mid-lung predominance |
| | Peribronchovascular predominance |
Reticular abnormality | Reticular abnormality | Extensive ground-glass abnormality (extent greater than reticular abnormality) |
| | Profuse micronodules (bilateral, predominantly upper lobes) |
Honeycombing with or without traction bronchiectasis | | Discrete cysts (multiple bilateral, away from areas of honeycombing) |
| | Diffuse mosaic attenuation/air trapping (bilateral in three or more lobes) |
Absence of features listed as inconsistent with UIP pattern | Absence of features listed as inconsistent with UIP pattern | Consolidation in bronchopulmonary segment(s)/lobe(s) |