We aimed to analyze efficacy and safety of O plus R-CHOP-like (O+R-CHOP) for untreated non-germinal center B-cell-like diffuse large B-cell lymphoma (non-GCB DLBCL) patients (pts)...5, 2, and 1 pt had detected MYD88, CD79A, and TP53 mutations, respectively....By subgroup analysis of 11 pts after induction stage...pts with MYD88 and CD79A mutations obtained CR of 80.0% and 100.0%, respectively among 10 pts with O+R-CHOP.