The ORR in subjects who received prior treatment with bendamustine, rituximab, and CHOP was 87.5%, 76.9%, and 76.9%, respectively. Tazemetostat at a dose of 800 mg BID showed encouraging efficacy in patients with relapsed or refractory EZH2 mutation-positive FL with an acceptable safety profile in the overall population. Thus, tazemetostat may be a potential option for the treatment of relapsed or refractory EZH2 mutation-positive FL.