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Leukemia Fact Sheet*

Source: www.co.cochise.az.us
Topic: Leukemia
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Sort Desciption: Definition and Development of Leukemia Leukemia is the term used for cancer that affects the blood cells, which account for 9% of all cancer cases diagnosed in the U.S. ...

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Definition and Development of Leukemia Leukemia is the term used for cancer that affects the blood cells, which account for 9% of all cancer cases diagnosed in the U.S. Normal, healthy blood is made up of fluid called plasma and three types of blood cells. White blood cells fight infection and disease. Red blood cells carry oxygen and carbon dioxide to and from the cells of the body. Platelets (also called thrombocytes) help form blood clots to control bleeding. Blood cells are made in the bone marrow, the soft, spongy middle part of the bones. In adults, most bone marrow can be found in the hips, ribs, spine, and skull. The immature blood cells in the marrow are called blasts. When leukemia develops, the body produces large numbers of abnormal blood cells. In most types of leukemia, the abnormal cells are white blood cells. The leukemia cells usually look different from normal blood cells and they do not function properly. Often, these abnormal blood cells are immature blasts that cannot grow into healthy blood cells. There are two kinds of abnormal white blood cells that cause leukemia. If the cancer cells are lymphoid, the disease is called Lymphocytic Leukemia. If they are myeloid (relating to bone marrow or spinal cord) cells, the disease is Myelogenous Leukemia. Leukemia may also be acute or chronic. acute leukemia cancer cells are immature blasts and grow quickly, while chronic leukemia cells are a combination of immature and mature cells, and grow more slowly. There are six types of leukemia, which doctors usually identify according to their growth speed (acute or chronic), and the cancer cell type (lymphocytic or myelogenous): Types of Leukemia Acute Lymphocytic Leukemia (ALL): This type of leukemia is the most common leukemia found in children, and some cases are adults over the age of 65. Very few cases of ALL are adults age 20-65. Acute Myelogenous Leukemia (AML): This type of leukemia almost always affects adult ...

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