Figures at a glance

Figure 1

Figure 2

FIGURE 1

Figure 1: Normal looking bronchiole with thin wall and mainly linear unicellular epithelium with ambiental antracotic pigment retention, HE x 40 (A); Chronic bronchiolitis: parietal lymphocytic infiltration and fusiform cells hyperplasia, with cylindrical cells hyperplasia, HE x 100 (B); Respiratory bronchiolitis: scarce lymphocytic parietal infiltration and luminal pigmented macrophages, HE x 40 (C); Hypersensitivity bronchiolitis: lymphocytic parietal infiltration also with commitment of arteriolar wall, HE x 200 (D).

FIGURE 2

Figure 2: Chronic bronchiolitis: epithelial basal cells with CK5.6 expression corroborating bronchial metaplasia, CK5.6 x 400 (A); Respiratory bronchiolitis: TGF-ß expression in epithelial cells, TGF-ß x 200 (B); Hypersensitivity bronchiolitis: TGF-ß expression in epitelial cells and wall macrophages, TGF-ß x 400 (C); Hypersensitivity bronchiolitis: TGF-ß expression in parietal fusiform cells and macrophages, TGF-ß x 100 (D).