Plerixafor is a CXCR4 receptor inhibitor, which was recently introduced for stem cell mobilization in myeloma and lymphoma patients prior to their transplantation. Since March 2009, we performed 16 mobilizations using plerixafor in combination with G-CSF in 10 patients with multiple myeloma, 3 Non-Hodgkin’s lymphoma and 3 Hodgkin’s lymphoma, who failed previous mobilization attempts with G-CSF in combination with chemotherapy.