Gross pathologic and histologic findings of lymphoma (PTLD) in miniature swine. (A) Animals that developed lymphomas or PTLD typically had pronounced lymphadenopathy, as represented by animal 17018. Image was acquired using a Kodak camera (Eastman Kodak, Rochester, NY) model Easyshare Z740 with a 45.5-mm to 55-mm lens adapter. No further image processing was done. (B) Lymph node tissue harvested from these animals demonstrated destruction of normal architecture and predominance of abnormal cells as represented by animal 13271. Slides were viewed with an Olympus BX51 compound microscope (Olympus America, Melville, NY) of sections stained with hematoxylin and eosin (H&E; Hematoxylin Gill's Formulation no. 2, Fisher Diagnostics, Fair Lawn, NJ; Eosin-Y, Richard-Allan Scientific, Kalamazoo, MI) using a lens at 40× (left) and 400× (right). Images were acquired using an Olympus digital microscope camera (Olympus America) model Q-Color 3, and were processed with Adobe Photoshop CS version 8 software (Adobe Systems, San Jose, CA).