Fig. 5From: An unusual and challenging case of HIV-associated primary CNS Lymphoma with Hodgkin-like morphology and HIV encephalitisP24 Immunohistochemistry. Photomicrographs of the background brain show positive p24 immunohistochemical staining within the multinucleated giant cells of HIV encephalitis (a, 400X), while the neoplastic cells are negative (b, 400X)Back to article page