GSK Biologicals' recombinant WT1 Antigen-Specific Cancer Immunotherapeutic GSK2130579A

Severe toxicities (as classified according to the National Cancer Institute's Common Terminology Criteria for Adverse Events (CTCAE), Version 3.0) during the study treatment period defined as a study product-related or possibly study product-related: * Grade 4 toxicity (exception: study product-related or possibly study product-related Grade 4 fatigue - including lethargy, asthenia, and malaise - had to have a duration of at least 48 hours to be taken into account). * Grade 3 toxicity lasting for at least 48 hours (exceptions: myalgia, arthralgia, headache, and fever, regardless of duration). * Grade 2 toxicity (i.e., rash, flushing, urticaria, and dyspnea). Drug fever was not part of this definition. * Decrease in renal function, with a calculated creatinine clearance \< 40 mL/min. * Grade 2 cardiac ischemia/infarction (i.e., asymptomatic and testing suggesting ischemia; stable angina).

CR = having \< 5% blasts in aspirate sample with marrow spicules and with a count of ≥ 200 nucleated cells, no blasts with Auer rods or persistence of extramedullary disease; different phenotype (by flow cytometry) to the pre-treatment specimen; absolute neutrophil count \> 1000/mm3; platelet count ≥ 100 000/mm3 and being independent of red blood cell (RBC) transfusions. PR = a decrease of ≤ 50% in the % of blasts in bone marrow aspirate compared to Visit 4; being independent of RBC transfusions and the absolute neutrophil ≥ 1000/mm3 and platelet counts and ≥ 100 000/mm3. SD = no sufficient criteria for CR, a PR or Progressive disease (PD = Reappearance of leukemic blasts in the peripheral blood; Reappearance/development of cytologically proven extramedullary disease, Appearance of new dysplastic changes, or in a bone marrow aspirate sample (with marrow spicules and with a count of ≥200 nucleated cells) of ≥5% blasts; or, in case of early progression, a higher blast % than at Visit 4).