Cytomorphology of immunoblastic lymphoma. (A) IB lymphoma predominantly harboring large cells with abundant, deeply basophilic cytoplasm, large vesicular nuclei and a large central solitary nucleolus (100× objective, total magnification ×1000). (B) IB lymphoma with plasmablastic features. Note that the predominant cell is large, with abundant, basophilic cytoplasm and eccentric, round to oval nuclei differing in size and a solitary or several paracentric nucleoli (100× objective, total magnification ×1000). Images have been performed with a Zeiss Axiophot Microscope, a Jenoptik ProgRes CF camera, and the ProgRes CapturePro 2.6 software package for image processing (Jenoptik).