The purpose of this research study is to learn about the effectiveness and safety of the study drug, tazemetostat, in adults with relapsed/refractory follicular lymphoma whose tumours do not have an “EZH2” genetic mutation. Follicular lymphoma is a blood cancer. It affects white blood cells called lymphocytes. White blood cells normally help to fight infections,
The participants of this study will be children, adolescents, and young adults with residual osteosarcoma, which cannot be removed completely through surgery. Participants will have achieved a partial response or stable disease at the end of conventional chemotherapy. Osteosarcoma is cancer of the bone. The cancer cells make immature bone cells, known as osteoid. Osteosarcoma