What is leukemia? The word is the Greek word Leuko leukemia (white) and AIMA (blood) strains. In short, this is a cancer of the blood or bone marrow. Affects the formation of blood cells, one of the main groups of cells in the body. Abnormal production and accumulation of white blood cells that characterizes this disease. This type of cancer begins to develop from stem cells in the bone marrow. Bone marrow is where blood cells are formed. The presence of abnormal cells, called leukemia cells?, Also known as leukocytes damaged the disease was confirmed. The abnormal cells are more likely than those with other cells with damaged DNA to cease. The whole process, it is difficult for other cells to do their job properly. In a healthy person, ultimately, leads to an increase in death WBC sweet. In this case, and die so easily and continue to accumulate. This displacement of the malignant cells, almost as a form of uncontrolled fission reaction, do not allow normal cell function and good results in case of illness. To better understand this disease, it is important to know the right conditions: Bone marrowThe inside of the bone marrow and this is red blood cells, platelets and leukocytes can be White blood cells (W.B.C):They are also called leukocytes, and the first helps fight infections. They consist of three types:• Lymphocytes - the key cells that help fight infections• Granulocytes - These are white blood cells to destroy microbes granules• Monocytes - These granulocytes and also help the body fight bacteria Red blood cells (R.B.C):They are the ones that carry oxygen to all body tissues. platelets:They are very important in the formation of blood clots, prevents bleeding blood vessels.