Representative autopsy sections from spleen and lung. Lymphoma cells were not overtly discernible on H&E section ((a) 100x magnification) but clearly identified by immunostains ((b) CD30 staining) in the spleen. In the lung parenchyma, lymphoid infiltrates were prominent with predominantly small to medium sized cells (H&E staining; (c) 100x magnification; (d) 400x magnification). Intravascular lymphoma involvement was evident morphologically ((e) H&E staining, 400x magnification) and confirmed by immunostains ((f) CD30, 200x magnification). Black arrowheads in (e) refer to intravascular lymphoma involvement.