R-VRD Followed by Lenalidomide Maintenance in Patients With Waldenstrom's Macroglobulinemia

"step 1; R-VRD induction : rituximab, bortezomib, lenalidomide, and dexamethasone induction~* Rituximab 375 mg/m2 intravenous on day 1~* Bortezomib 1.3mg/m2 subcutaneous on day 1, 8, 15~* Lenalidomide 15mg p.o on day 1-21~* Dexamethasone 20 mg/m2 intravenous or p.o on day 1-4~Step 2 ; Maintenance Beginning 8 weeks after completion of induction therapy, patients receive lenalidomide 10mg once day 1-21 for 4 weeks. Treatment repeats every 1 months for 24 months."