Intrafollicular neoplasia/“in situ” follicular lymphoma. Within 2 affected follicles (box), the BCL2⁺ (A-B) and CD10⁺ (C) cells are confined only to the GCs. Within the same affected follicles, the proliferation rate as assessed by Ki67/MIB1 is lower than that observed in reactive follicles (box) (D). Immunoperoxidase, hematoxylin counterstain. Images were taken using a Nikon Eclipse 80i microscope (Nikon) with Plan UW 2×/0.06 (A), Plan Fluor 20×/0.50 (B), Pan Fluor 4×/0.13 (C-D) objectives and Nikon digital sight DS-Fi1 camera equipped with control unit-DS-L2 (Nikon). Images were assembled using Adobe Photoshop 6 (Adobe Systems).