The treatment of leukemia and lymphoma has different segments. Induction therapy refers to the methods used to destroy visible malignant T-cells in blood, marrow or lymph nodes to cause or “induce” a remission, which results in disappearance of abnormal cells and a return of normal blood cells. Consolidation therapy is additional treatment given after remission is induced. Often high doses of drugs are used in several short periods of treatment. The goal is to further decrease the concentration of residual malignant T-cells. The greater the reduction in malignant T-cells, the higher the probability that natural defenses will suppress the disease and result in a long-term remission. Maintenance or continuation therapy refers to the administration of chemicals periodically for a long period of time (months or years), usually in lower doses than consolidation therapy.