Lymph node biopsy pathology. 10x (a) and 20x (b) images of lymph node tissue sections were captured on an Olympus BX40 microscope with Olympus SC100 camera and Olympus analySIS getIT software. (a) Atrophic germinal centers with mantle zone lymphocytes arranged in concentric rings create an “onion-skinning” appearance. Note that the interfollicular areas are expanded by sheets of plasma cells. (b) Germinal center with penetrating vessels and a “lollipop” appearance.