Patients will be assessed after 3 months post high dose melphalan with ASCT for trial eligibility. Trial patients will receive bortezomib consolidation in 4-weekly cycles starting at 3 months post-ASCT. Treatment will be with bortezomib 1.3mg/m2 by subcutaneous injection on days 1, 8, 15 and 22 of each 28-day cycle.
After 3 cycles, at approximately 6 months post ASCT, patients will undergo re-staging of their disease.
Patients with progressive disease will stop trial treatment. All other patients will continue treatment up to a maximum of 8 cycles, as tolerated.