ABC DLBCLs often have CNAs in FOXP1, NFKBIZ, CDKN2A, CDKN2B, INF4a, BCL2, NFATC1 and SPIB, while GCB DLBCLs frequently harbor CNAs in REL, PTEN, MDM2, MIHG1 and ING1. PMBCL often demonstrate CNAs of JAK2 and PD-L2 [6]. The gene discussed is PTEN; the disease is aneurysmal bone cyst.