This study aimed to evaluate efficacy and safety of oral HDACI tucidinostat (formerly known as chidamide) plus R-CHOP (CR-CHOP) in elderly patients with newly diagnosed DLBCL...mutations in KMT2D, but not in CREBBP/EP300, were associated with inferior PFS and OS (P = 0.043 and < 0.001, respectively, Fig. 4b). The 2-year PFS and OS rates were 40% (95% CI 5–75) and 40% (95% CI 5–75) in patients with KMT2D mutation, significantly shorter than those without mutation (68% [95% CI 47–82] and 89% [95% CI 70–96]).