Leukemia is a disease of the bone marrow and blood that is known to affect normal blood cell production. Normal blood cells have a limited period of life and they need to be constantly replaced by fresh, young cells to carry on their activity. There is a type of cell within the bone marrow (stem cell) that matures into the type of blood cells that the body needs. In normal condition, these stem cells develop either into red blood cells, white blood cells or platelets, into a controlled way. Leukemia perturbs the normal development of blood cells and causes the accumulation of partially developed cells, that aren