General Aspects of Leukemia ~ Many people with leukemia today. A large number of cancer cases are identified as leukemia. Leukemia is a type of cancer of the bone marrow and blood. The disease is characterized by an overproduction of immature blood cells (stem cells) are not able to fully develop and carry out normal blood cell activities.
According to its functions and structure, there are three types of cells in different normal blood: red cells, white cells and platelets. Through the process of hematopoiesis, these three types of blood cells are developed from a distinct type of blood cells called stem cells. The process by which a stem cell is a blood cell maturity takes place in the bone marrow.
Depending on the speed of development and persistence of the disease, there are two types of leukemia: acute leukemia and chronic leukemia. Acute leukemia is known to develop very rapidly, while chronic leukemia develops slowly. According to the types of blood cells affected by the disease may be lymphocytic or myelogenous leukemia.
Lymphocytic and myeloid leukemia types are produced from different types of cells: the type of lymphocytic leukemia develops from cells called lymphoblasts or lymphocytes in the spongy tissue of the bone, while myeloid leukemia (sometimes called myeloid and myelocytic leukemia) develops from myeloid cells.
In the case of acute forms of leukemia, the abnormal cells are early immature cells. normally leukemia cells do not divide faster and more frequently than normal stem cells, they do not stop their process of division when they should. chronic leukemia, in addition to their low development is different from acute leukemia by the maturity of the sick cells that are capable of achieving. Stem cells affected by chronic leukemia reach a higher degree of maturation, but with modifications that can not act as healthy white blood cells do. Unlike chronic form of acute leukemia not healthy cells of the disease are periods of much longer life and tend to accumulate in different parts of the body.
Leukemia affects people of all age groups. Children tend to respond better to certain types of leukemia, while adults face difficult disease. Cases of acute leukemia exceed those of chronic leukemia of about 10 percent.