Figure 2 shows the biopsy and stains confirming the diagnosis. Stains are positive for CD20 and PAX5 (Fig. 2), but also positive for CD10, CD79a, and Ki-67. Immunohistochemical (IHC) analysis did not detect EBV via fluorescent in situ hybridization (FISH), and the lymphoma was classified as EBV-negative DLBCL. This evidence concerns the gene MKI67 and diffuse large B-cell lymphoma.