After screening of a panel of cell lines and human primary tumor samples, we detect the expression of PD-L1 on EBV-positive cell lines, non-GCB (ABC)-DLBCL cell lines, primary EBV-positive DLBCL, and non-GCB (ABC)-DLBCL tissue specimens using flow cytometry. Here, CD274 is linked to aneurysmal bone cyst.