ALL- acute lymphocytic leukemia is a fast-growing cancer in which the body produces a large number of immature white blood cells (lymphocytes). These cells can be found in the blood, bone marrow, lymph nodes, spleen, and other organs. Most cases occur in children between ages 3 and 7.
AML- acute myelocytic leukemia is cancer that starts inside bone marrow, the soft tissue inside bones that helps form blood cells. The cancer grows from cells that would normally turn into white blood cells. It generally occurs around age 65.
CLL- chronic lymphocytic leukemia causes a slow increase in the number of B lymphocytes in the bone marrow. The cancerous cells spread from the blood marrow to the blood, and can also affect the lymph nodes and other organs. CLL causes the bone marrow to fail and weakens the immune system.
CML- chronic myeloid leukemia is a slowly progressing disease in which too many white blood cells (not lymphocytes) are made in the bone marrow.
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