Skip to main content
. 2010 Feb 23;143(2):120–131. doi: 10.1016/j.jcpa.2010.01.012

Fig. 1.

Fig. 1

Porcine lung tissue with different histological lesions found in cases of CBP. (a) Mild BALT hyperplasia (+) showing diffuse infiltration of lymphocytes (arrows) into the peribronchial, peribronchiolar and perivascular tissues including the lamina propria of the airways. B, bronchiole; V, blood vessel. HE. Bar, 250 μm. (b) Moderate BALT hyperplasia (++) showing greater diffuse infiltration of lymphocytes and/or the presence of a few lymphoid nodules (N). B, bronchiole. HE. Bar, 250 μm. (c) Marked BALT hyperplasia (+++) showing a considerable number of lymphoid nodules (N). B, bronchiole. HE. Bar, 250 μm. (d) Extensive BALT hyperplasia (++++) showing an extensive number of lymphoid nodules (N) affecting most of the lung section. A compressed bronchiole (B) can be seen. HE. Bar, 250 μm. (e) Suppurative alveolar exudates showing a cellular infiltrate dominated by neutrophils in acute suppurative bronchopneumonia (ASBP). HE. Bar, 25 μm. (f) Non-suppurative exudates showing a cellular infiltrate dominated by mononuclear inflammatory cells in chronic non-suppurative bronchopneumonia (CNBP). HE. Bar, 25 μm. (g) Mixed exudates showing cellular infiltrate with both neutrophils and mononuclear cells in subacute mixed bronchopneumonia (SMBP). HE. Bar, 25 μm. (h) Marked hyperplasia of type II pneumocytes. More than 50% of the alveolar surface is lined by type II pneumocytes. IHC. Bar, 25 μm.