CD274 and lymphoma: In the case with composite EMZL and EBV‐positive DLBCL (case 6), both lymphomas harboured 23 common variants, including mutations in CD274, TET2, and TNFRSF14, and the EBV‐positive DLBCL showed an additional MYC translocation and a further 20 variants over the EMZL component (Table 1, Figure 2).