Between 20-40% of patients with multiple myeloma (MM) present with renal impairment (RI) at diagnosis (Korbet & Schwartz, 2006; Kastritis et al., 2007) and up to 10% of them require dialysis (Dimopoulos et al., 2010). Prognosis in these patients remains significantly worse when compared with patients with normal renal function (Haynes et al., 2010). Daratumumab is an anti-CD38 IgG kappa human monoclonal antibody that has demonstrated superior clinical benefit across lines of therapy, either as monotherapy or when combined with standard-of-care regimens for the treatment of patients with relapsed and refractory MM (RRMM) (Usmani et al., 2016; van de Donk et al., 2016). However, data of daratumumab in patients with RRMM and dialysis-dependant renal failure are lacking. We report the efficacy and safety results from a retrospective Spanish study of daratumumab in patients with RRMM and end-stage RI requiring dialysis. Methods M.J.C. performed the research and contributed to analyzing of data and paper writing. J.D.L.R. was involved in designing the study, analysis, interpretation and reporting of the data, and wrote/reviewed the paper. All authors performed the research and reviewed the draft manuscript and approved the final version for publication.