Study of REVLIMID (Lenalidomide) Versus Placebo in Patients With Low Risk Myelodysplastic Syndrome

Trial Design: This clinical trial is a phase III multicenter, randomized, double blind and controlled with placebo trial and with two arms designed to assess the efficiency and toxicity of the scheme Lenalidomide versus observation in a series of 60 patients with low risk myelodysplastic syndrome associated to 5q deletion with anemia (Hb≤12g/dL) but without the need of transfusion. Patients are randomized in the study in a 2:1 ratio. They will receive treatment for 104 weeks until progression of the disease, which implies that the patient suffering from anemia due to myelodysplastic syndrome requires transfusion of at least 2 UCH/56 days (2 months) with a minimum follow up of 112 days (4 months), or unacceptable toxicity. Disease: Low risk myelodysplastic syndrome associated to the loss of 5q without transfusion requirements. Total number of patients: In total 60 patients will be included, 40 assigned to the treatment branch and 20 to the placebo branch. Calendar: First patient first visit: February 2010, and Last patient last visit expected in February 2016. (Recruitment was initially expected to take place over a period of 24 months and was expected to be finished in February 2012, but due to low rate of recruitment it was extended until the population sample is included in the trial).