Human Leukocyte Antigen (HLA) Class I Haplotype Mismatched Natural Killer Cell Infusions

Inclusion Criteria: * Patients who have undergone an autologous stem cell transplant for the following diseases: * Acute Myeloid Leukemia * Non-Hodgkin's Lymphoma * Hodgkin's Disease * Multiple Myeloma * Age 13 - 70 years old * Able to give informed consent * Hepatic and renal function: bilirubin less than or equal to 2x normal limits, AST and ALT less than or equal to 2x normal limits, serum creatinine less than or equal to 1.5x normal * ECOG Performance Status less than or equal to 1 (at planned time of transplantation) * Patients with no active infection Exclusion Criteria: * Patients who have not recovered sufficiently from the side effects of the autologous transplant (i.e. have \> grade 2 toxicity in any organ system) * Patients who have insufficient engraftment parameters according to the following criteria: WBC \< 2,500 /mm3 and platelets \< 50,000/mm3 * Radiation therapy, chemotherapy, or immunotherapy beginning one week before NK-cell infusion and lasting 2 weeks after NK-cell infusion. * Intrinsic impaired organ function (as stated above). * Physical or psychiatric conditions that in the estimation of the PI or designee place the patient at high-risk of toxicity or non-compliance. * Uncontrolled, life-threatening infections at the time of infusion. * Concurrent treatment with corticosteroids and/or other immuno-suppressive drugs.