Leukocyte elevation is often seen in two situations, one is infection, the other is some blood diseases. White blood cells are derived from granulocyte progenitor cells in bone marrow. White blood cells in the blood are the police in the body and the most important immune cells in the body. When external microorganisms invade the body, bone marrow will produce more white blood cells, which will increase and kill microorganisms and pathogenic bacteria. At this time, other cells in the routine blood test, such as red blood cells and platelets, do not change much. Another situation is that the white blood cells produced by bone marrow have no function. Although the number of white blood cells in the blood is increased, it cannot play a role, which is very easy to cause infection in patients. This situation is common in leukemia, often accompanied by red blood cells, platelets decline, bone marrow biopsy can also see the sick hematopoietic cells.
