Hematoxylin and eosin–stained tissues and blood smears from TCL-1 leukemic and preleukemic mice. Images were visualized using an Olympus BX41 microscope (Olympus, Melville, NY) as well as 40 ×/0.65 numeric aperture (NA) and 60 ×/0.80 NA plan objectives for tissue sections and blood smears, respectively. Photographs were taken using an Olympus C-3040 camera, and images were acquired and processed using Adobe Photoshop (Adobe Systems, San Jose, CA) in the OSU Mouse Phenotyping Shared Resource facility.