Fig. 15
From: Fibrosing pneumonia – how to diagnose, and how to recognize the etiology?
rhA, acute form with LIP pattern; in this case the diagnosis of juvenile rhA was established. a) overview, b and c) LIP with hyperplasia of BALT; d) CD20 positive lymphocytes, e) lymphocytes positive for CD4, and f) CD8 positive lymphocytes. This immune reaction excluded hypersensitivity pneumonia. H&E and immunohistochemistry, bars 200, 100, and 50 μm, respectively