Therapies against aggressive T-cell lymphomas (TCLs) are limited and treatment resistance to histone deacetylase (HDAC) inhibitors often occurs. Polycomb protein EED is a key member of the polycomb repressive complex 2 (PRC2) complex and is an attractive therapeutic target for TCLs. APG-5918 is an EED inhibitor from Ascentage Pharma Group International Co. Ltd. that has been proven to disrupt the PRC2 functioning and has been tested in preclinical TCL models as a promising approach.