SDC1 and primary effusion lymphoma: While the overall morphologic and clinical findings were consistent with MCD-HHV8, the KSHV/HHV8 + cells were anaplastic exhibiting an unusual phenotype (CD138 +, κ/λ-, IgM/IgG-, lack all B-cell markers) not typical of KSHV/HHV8 + MCD/DLBCL but more consistent with PEL/EC-PEL.