Figure 2: Immunohistochemistry of bronchoscopic biopsy of the
first patient.
Panel A) Infiltration of small cellular lymphoid cell components
indicating manifestation of lymphoma in hematoxylin and eosin stain.
Panel B) Anti-CD20 immunohistochemistry confirmed a highly suspicious B
cell population.
Panel C) Low proliferation rate of the B cell population detected by
MIB-1 immunohistochemistry.