Yuqin Song, PhD, of Peking University Cancer Hospital & Institute, Beijing, China, discusses the promising results of a Phase II trial investigating the efficacy and safety of the BTK inhibitor zanubrutinib in relapsed/refractory mantle cell lymphoma (NCT03206970). Speaking at the American Society of Hematology (ASH) 2018 Annual Meeting and Exposition in San Diego, CA, Dr Song describes the best overall response rate for zanubrutinib as 84%, with adverse events generally being grade I or II.