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Of the seven patients with CKD stages 4 and 5, five (71%) achieved a haematological response of PR or better. A significant renal improvement was also observed in four patients categorized as CRrenal 1; PRrenal 1; and MRrenal 2 with stability in renal dysfunction in other patients (Dimopoulos et?al, 2009). The two patients whose disease remained stable on therapy experienced no worsening of renal function. Despite early reports of hyperkalaemia, thalidomide is well tolerated in significant renal impairment with improvement in renal function. This small retrospective audit showed that Bendamustine could be safely used in combination with thalidomide in patients with advanced stage CKD due to their limited renal excretion. Two main issues with use of alkylating agents in myeloma are poor stem cell mobilization and dosing in renal impairment. http://www.selleck.cn/products/nlg919.html One patient in our cohort was successfully mobilized and underwent autologous transplantation with full engraftment. Fixed dose http://www.selleckchem.com/products/bmn-673.html bendamustine (60?mg/m2 per week in a 21-d cycle) in combination with prednisolone and thalidomide was used in a Phase 1 study of relapsed myeloma patients (Ponisch et?al, 2008). ORR was 80%, with no non-haematological toxicity grades 3/4. Grade 3/4 neutropenia or thrombocytopenia was observed in up to 50% of patients at this dose level (Ponisch et?al, 2008). A large randomized trial investigating the additive use of plasma exchange in this group of patients yielded negative results (Clark et?al, 2005). Extended haemodialysis (HD) using a polyarylethersulfone high cut-off dialyser resulted in early reduction in serum free light chain levels (sFLC) and enhanced renal recovery, and sustained sFLC reduction was achieved when myeloma therapy, given in parallel, was uninterrupted (Hutchison et?al, 2009). Our data extends the use of bendamustine combination in this group of patients. Bendamustine may be more appropriate in patients with significant neuropathy http://www.selleckchem.com/products/pexidartinib-plx3397.html (>Grade 2) where bortezomib is contraindicated. A national open label, multicentre, randomized, Phase II trial of bendamustine (60 versus 100?mg/m2) on days 1 and 8 of a 28-d cycle, in combination with thalidomide and dexamethasone is recruiting relapsed/refractory myeloma patients (ISRCTN90889843). This Phase II trial also includes patients with CKD stage 5 based on the findings in the present audit. ""Drug-induced agranulocytosis (neutrophil count