[INTRODUCTION - Bortezomib, a first-in-itsclass proteasome-inhibitor drug was registered in 2004 for the salvage treatment of relapsed and/or refractory multiple myeloma. We have been using this drug in our department for the treatment of myeloma patients since 2005. PATIENTS AND METHODS - In this retrospective study, treatment results (response rate, response duration, survival) as well as the complications and side effects were analysed based on 60 myeloma patients treated over a period of 18 months. The patients received at least one full cycle of non-first-line bortezomib-based (predominantly combinational) therapy. RESULTS - At least minimal laboratory and/or clinical response was observed in 47 of the 56 patients who could be analysed. Clinically meaningful (at least partial remission) response was seen in 41 of 56 patients. Immune-fixation negative complete remission was achieved in six patients. Median progression-free survival of our patient population was 13 months (10.8-14.8 months, n=49, adjusted for patients lost in the first 6 weeks and for those with less than 6 weeks of follow-up). As for overall survival, the median has not been reached, while treated patients had an 80.3% probability of survival at one year. CONCLUSIONS - Based on the treatment results of 60 myeloma patients, bortezomibbased therapy is clearly effective in relapsed and/or refractory myeloma.]