BCR and aneurysmal bone cyst: Compared to GCB-DLBCL, ABC-DLBCL is associated with a poorer patient outcome when treated with CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone) or R-CHOP (rituximab-CHOP) therapies and, phenotypically, resembles BCR-activated B cells arrested during plasmacytic differentiation [1,2].