Figure 4: Immunohistochemistry of the transbronchial biopsy from
the second patient.
Panel A) Infiltration of small cellular lymphoid cell components in the
center of the sample in hematoxylin and eosin staining; scale 200 µm
Panels B) and C): CD20 positivity of the lymphoid infiltrates detected
in hematoxylin and eosin staining. B) scale 500 µm; C) scale 100 µm