A Study to Assess Long-term Safety of Tazemetostat in Adult Participants of All Ages With Any Disease Treated With Tazemetostat in a Previous Clinical Study

This open-label, multicenter, global study will provide continuing access to tazemetostat therapy for subjects who have completed their participation in a prior tazemetostat study (either with monotherapy or combination therapy) without unacceptable toxicity, have not had evidence of tumor progression as defined by disease-appropriate standard criteria, and continue to receive clinical benefit from the therapy. Subjects will receive tazemetostat as dictated in their antecedent study. Visits will be conducted per Standard of Care (SoC) as appropriate in each country and as determined by the Investigator. Subjects will be followed for long-term safety in addition to time to treatment failure (TTF) and overall survival (OS).