11. Patients with a "currently active" second malignancy, other than non-melanoma skin cancer and carcinoma in situ of the cervix. Patients are not considered to have a "currently active" malignancy if they have completed therapy for a prior malignancy, are disease free from prior malignancies for >5 years, and are considered by their physician to be at less than 30% risk of relapse. Also, patients with basal cell carcinoma of the skin, superficial carcinoma of the bladder, carcinoma of the prostate with a current PSA value of <0.5 ng/mL, or cervical intraepithelial neoplasia are eligible. Patients who are on hormonal therapy for a history of either prostate or breast cancer may enroll, if there has been no evidence of disease progression during the previous 3 years.