PAX5: Paired Box 5; CD: Cluster of Differentiation; BCL: B-Cell Lymphoma; MYC: Cellular Myelocytomatosis Oncogene (c-Myc); MUM1: Multiple Myeloma Oncogene 1; EBV-EBER (in-situ hybridization): Epstein-Barr Virus–Encoded RNA (EBER) in-situ hybridization. The gene discussed is MYC; the disease is B-cell non-Hodgkin lymphoma.