 - Females of childbearing potential FCBP must have a negative serum or urine pregnancy test with a sensitivity of at least 50 mIUmL within 10 - 14 days prior to and again within 24 hours of starting lenalidomide and must either commit to continued abstinence from heterosexual intercourse or begin TWO acceptable methods of birth control, one highly effective method and one additional method AT THE SAME TIME, at least 28 days before starting to take lenalidomide Revlimid. FCBP must also agree to ongoing pregnancy testing. Males must agree to use a latex condom during sexual contact with a FCBP even if they have had a successful vasectomy. All subjects must be counseled at a minimum of every 28 days about pregnancy precautions and risks of fetal exposure. 