Study design and methodology This is a Phase II multicenter study designed to evaluate the safety and efficacy of combination BDR. BDR will be administered in one 21-day treatment cycle followed by four 35-day treatment cycles to patients with WM. Bortezomib will be administered as an iv push over 3 to 5 seconds at a dose of 1.3mg/m2/day on days 1,4,8 and 11 of cycle 1. On cycles 2-5 bortezomib will be given at a dose of 1.6mg/m2/day on days 1,8,15 and 22 of each cycle. Only on cycles 2 and 5, following the administration of Bortezomib, dexamethasone 40mg iv and Rituximab 375 mg/m2 iv will be administered. A total of 8 infusions of rituximab will be administered. Subsequently patients rated as CR, PR, MR or SD will be followed without any treatment until there is evidence of progressive disease.