Viracta Therapeutics announced the U.S. Food & Drug Administration (FDA) has granted Orphan Drug Designations (ODD) to their Phase 2 drug candidate, nanatinostat, in combination with the antiviral valganciclovir, for the treatment of post-transplant lymphoproliferative disorder (PTLD), plasmablastic lymphoma, and angioimmunoblastic T cell lymphoma. The therapeutic approach is being investigated in a Phase 1b/2 clinical trial of Epstein Barr Virus (EBV)-associated lymphomas, including the ODD granted subtypes.