We initiated a phase II study to evaluate the safety and efficacy of ven monotherapy in previously treated pts with WM (NCT02677324)….The MYD88L265P mutation was detected in all pts, and CXCR4 mutations in 16 (53%)…. At best response, very good partial response (VGPR) was attained in 5 pts (17%), partial response in 11 (37%), minor response in 8 (27%) and stable disease in 6 (20%), for overall response rate of 80% and major response rate of 53%.