In most cases, the leukemia starts in the bone marrow. Then, it will produces blood cell uncommonly and may spread to other places and invades the blood fairly quickly. Moreover, It can spread to other parts of the body, which included the lymph nodes, liver, spleen, central nervous system (brain and spinal cord), and testicles (in males). Patients must be cured rapidly because they will die in a few of month after infection. By the way, another type of leukemia is chronic leukemia. The chronic leukemia is a group of malignancies involving the hematopoietic system. Chronic leukemia is a disease that arises from a clonal process involving an early progenitor hematopoietic stem cell. It is the most common found in widely ages of adults [3].