CD79B and diffuse large B-cell lymphoma: Systemic DLBCL can be subdivided into seven genetic subtypes, including MCD (including MYD88L265P and CD79B mutations), N1 (including NOTCH1 mutations), A53 (characterized by TP53 mutations and deletions), BN2 (including BCL6 translocations and NOTCH2 mutations), ST2 (with recurrent SGK1 and TET2 mutations), EZB Myc+ and EZB Myc- (4).