SAN DIEGO, Dec. 12, 2023 (GLOBE NEWSWIRE) -- Viracta Therapeutics, Inc. (Nasdaq: VIRX), a clinical-stage precision oncology company focused on the treatment and prevention of virus-associated cancers that impact patients worldwide, today announced that the U.S. Food and Drug Administration (FDA) has granted an orphan drug designation (ODD) to Nana-val (nanatinostat in combination with valganciclovir), the company's all-oral investigational therapy targeting Epstein-Barr virus (EBV)-associated cancers, for the treatment of nasopharyngeal carcinoma (NPC). This represents the first ODD granted for Nana-val in Epstein-Barr virus-positive (EBV+) solid tumors and outside of EBV-associated lymphomas. The FDA previously granted Nana-val ODD for the treatment of T-cell lymphoma, post-transplant lymphoproliferative disorder, plasmablastic lymphoma, and EBV+ diffuse large B-cell lymphoma, not otherwise specified.