(Fig 3a) Pericardial primary effusion lymphoma (CT scan of the chest). (Fig 3b) Photomicrograph of pericardial fluid, cytospin preparation with atypical lymphoid cells with basophilic cytoplasm and vacuolization (Wright-Giemsa, original magnification x 600), Inset: prominent mitosis (arrow) in one of the lymphoma cells. (Fig 3c) HIV-associated PEL showing lymphoma cells with HHV8 viral nuclear inclusions (cell block preparation; H&E stain). [Figs 3a and 3b, copyright 2007, The AIDS Reader, CMPMedica., all rights reserved]