Ans.: Leukemia is a type of cancer. Cancer is a group of many related diseases. All cancers begin in cells, which make up blood and other tissues. Normally, cells grow and divide to form new cells as the body needs them. When cells grow old, they die, and new cells take their place. Sometimes this orderly process goes wrong. New cells form when the body does not need them, and old cells do not die when they should. Leukemia is cancer that begins in blood cells.Normal blood cells
Blood cells form in the bone marrow. Bone marrow is the soft material in the center of most bones.
Immature blood cells are called stem cells and blasts. Most blood cells mature in the bone marrow and then move into the blood vessels. Blood that flows through the blood vessels and heart is called the peripheral blood.
Ans.: The types of leukemia are grouped by how quickly the disease develops and gets worse. Leukemia is either chronic (gets worse slowly) or acute (gets worse quickly):
The types of leukemia are also grouped by the type of white blood cell that is affected. Leukemia can arise in lymphoid cells or myeloid cells. Leukemia that affects lymphoid cells is called lymphocytic leukemia. Leukemia that affects myeloid cells is called myeloid leukemia or myelogenous leukemia.
Ans.: No one knows the exact causes of leukemia. Doctors can seldom explain why one person gets this disease and another does not. However, research has shown that people with certain risk factors are more likely than others to develop leukemia. A risk factor is anything that increases a person's chance of developing a disease.Studies have found the following risk factors for leukemia:
In the past, some studies suggested exposure to electromagnetic fields as another possible risk factor for leukemia. Electromagnetic fields are a type of low-energy radiation that comes from power lines and electric appliances. However, results from recent studies show that the evidence is weak for electromagnetic fields as a risk factor.
Ans.: An increased risk of leukaemia can run in families. If one person in the family has leukaemia, the other members have three times the normal risk of getting the same type of leukaemia.
Ans.: Like all blood cells, leukemia cells travel through the body. Depending on the number of abnormal cells and where these cells collect, patients with leukemia may have a number of symptoms.Common symptoms of leukemia:
Ans.: There are four common types of leukemia:
Ans.: About half of all cases of acute lymphocytic leukaemia are in children under 10 years old, with another quarter of cases occurring in adolescents. However, the other main types of leukaemia normally occurr in people over 50. There are many cases of leukaemia in the Asian subcontinent each year amongst children, with many of higher age groups,as well.