The FDA (the U.S. Food and Drug Administration) has approved lenalidomide but it has been approved for other uses such as in the treatment of other cancers including multiple myeloma and non-Hodgkin lymphoma. Although lenalidomide has been studied in patients with AML, it has not been approved by the FDA for standard use in AML. Lenalidomide is a compound made by the Celgene Corporation. It has properties which could demonstrate antitumor effects. The exact antitumor mechanism of action of lenalidomide is unknown.