CD5 and diffuse large B-cell lymphoma: CD5‐positive (CD5+) DLBCL, activated B‐cell‐like (ABC) DLBCL, and nongerminal center B‐cell‐like (non‐GCB) DLBCL are included in the 2008 WHO classification as poor prognostic subgroups of DLBCL, not otherwise specified (NOS) 2.