Granulocytic leukemia is marked by an increase in white blood cells called granulocytes . These are made in the bone marrow . Normal granulocytes are essential to the body's defense against infection, but abnormal leukemic granulocytes lack this capability. Acute leukemia can occur at any age, but it is most often seen in children. It accounts for about half of all leukemia cases.
Chronic leukemia occurs most often in adults, but can occur at any age.
It accounts for about half of all leukemia cases. Leukemia, like other cancers, is a disease of the body's cells. All cells reproduce themselves by dividing. Normal growth and repair of body tissues take place in this orderly manner. When cell division is not orderly, abnormal growth takes place.