Blood is a body part. Blood has different components SCH as red blood cells, white 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 belonging to the "lymphoid" group. Lymphoid cells are affected. The disease progresses rapidly. This is more common among children. blood cancer or leukemia is actually a group of diseases, each of which impede the normal functioning of blood cells and progressively weaken the system. Leukemia is classified into acute or chronic. Samples of blood and urine can also be tested for various substances, called tumor markers that can indicate cancer.Causes
A weakened immune system - this may be the result of drugs that suppress the immune system (such as those used for organ transplants), high doses of radiation (as in radiotherapy for cancer of another), or diseases that affect the immune (such as HIV).
Contact with a chemical called benzene, one of the chemicals in petrol and a solvent used in rubber and plastics industry.
Genetic disorders like Fanconi anemia, Schwachman-Diamond syndrome and Down syndrome.