Study to Evaluate Immune Responses in Neurologically Normal Cancer Patients

Inclusion Criteria: 1. Males and females ages 25 -75 2. If leukapheresis: Hepatitis B surface antigen negative if tested\* Hepatitis C antibody negative if tested\* HIV antibody negative if tested\* Venereal disease reaction level (VDRL) negative if tested\* No known IV drug users Hemoglobin \> 8.5 White blood cell count \> 3,800 Platelets \> 120,000 International normalized ratio (INR) \< 2 (verified only if clinically indicated) 3. If large blood draw (1/2 to 1 unit) in lieu of leukapheresis: Hepatitis B surface antigen negative if tested\* Hepatitis C antibody negative if tested\* HIV antibody negative if tested\* VDRL negative if tested\* No known IV drug users HgB \> 10.0 WBC \> 3,800 Platelets \> 120,000 INR \< 2 (verified only if clinically indicated) Exclusion Criteria: No known neurologic disease 2. No known central nervous system (CNS) metastasis on clinical exam 3. No chemotherapy within 1 month 4. No New York Heart Association class III/IV status 5. No pulmonary disease which limits daily activities 6. No anticoagulation therapy