Fig. 24
From: Fibrosing pneumonia – how to diagnose, and how to recognize the etiology?
Chronic hypersensitivity pneumonia, a) inflammatory infiltrates and cystic remodeling is seen, in b) BALT hyperplasia and fibrosis, in c) myofibroblastic foci and lymphocytic infiltrations, in d) fibrosis, lymphocytes and multinucleated giant cells; e) shows cystic remodeling and bronchiolar metaplasia, in f and h) ill formed granulomas and giant cells are seen; in g) massive sclerosis of a pulmonary artery next to an old myofibroblastic focus are found. H&E, bars 200, 100, 50, and 20 μm, respectively