Blood is a parts of the body. Blood has different components sch as red blood cells, white blood cells, platelets and plasma. The red blood cells (rbc), platelets also called monocytes because it is belong to the “myeloid” group and other white blood cells belong to the “lymphoid” group. Lymphoid cells are affected. Disease progresses quickly. This is most common among children. Blood cancer or Leukaemia is actually a group of diseases, each of which impede with the normal functioning of blood cells and progressively weaken the system.leukaemia is classified as either Acute or Chronic. Blood and urine samples may also be tested for various substances, called tumor markers, which may indicate cancer.sometimes fatal complication of allogeneic transplants in which the patient’s immune system...