Table 1 HRCT findings in correlation with histologic features

18 (41.8%)

GGO^a + Air trapping (mosaic) (Fig. 1)

Mild alveolar septal expansion with lymphoplasmacytic cellular inflammatory infiltrate with peribronchiolar accentuation and evident cellular/granulomatous bronchiolitis

9 (20.9%)

GGO + Centrilobular Nodules (Fig. 2)

Interstitial pneumonia with interstitial and peribronchiolar ill-formed non-necrotizing granulomas

5 (11.6%)

Diffuse isolated GGO

Alveolar septal expansion with lymphoplasmacytic cellular inflammatory infiltrate with or without interstitial fibrosis

4 (9.3%)

GGO + Traction bronchiectasis

Alveolar septal expansion with lymphoplasmacytic cellular inflammatory infiltrates with peribronchiolar accentuation and cellular bronchiolitis with variable degrees of interstitial, subpleural or peribronchiolar fibrosis with or without remodeling.

3 (6.9%)

GGO + Consolidation

Alveolar septal expansion with lymphoplasmacytic cellular inflammatory infiltrate

2 (4.6%)

GGO + Reticulations

Alveolar septal expansion with lymphoplasmacytic cellular inflammatory infiltrate

2 (4.6%)

GGO + Cysts

Alveolar septal expansion with lymphoplasmacytic cellular inflammatory infiltrate with airspace dilatation