Leukemia is classified as acute and chronic leukemia. In acute leukemia blood, cells are immature and they did not carry normal functioning. They grow rapidly and they require rapid and fast treatment. In chronic leukemia blood cells are mature. They grow slowly and function normally. In some cases, individual, show no early symptoms. Acute lymphocytic leukemia is the most common type of leukemia that usually common in children. Acute myelogenous leukemia occurs mostly in both children and adults but in males, it occurs most.  Other types are chronic lymphocytic leukemia, chronic myelogenous leukemia, hairy cell leukemia, and myelodysplastic syndrome.