CC-5013 (Revlimid) is a thalidomide analogue, 50000 times more potent than thalidomide in inhibiting TNF-alfa secretion, a potent growth factor for myeloma cells. Revlimid represents a novel class of anti-cancer drugs, it is active in patients with multiple myeloma who are refractory to conventional and high-dose chemotherapy with a response rate of approximately 30%. The association Revlimid plus dexamethasone further increases the response rate induced by Revlimid by an additional 30%.