In our patients, the GCB-associated mutations in TNFRSF14(ref. 20) were restricted to GCB-DLBCL cases and the ABC-associated mutations in MYD88(ref. 20) were restricted to non-GCB/ABC-DLBCL tumors (Figure 3). The gene discussed is TNFRSF14; the disease is aneurysmal bone cyst.