Leukopenia is defined as that the white blood cell count in peripheral blood is continuously lower than 4.0 * 10 9/L, and the main component of white blood cells is neutrophils, so neutropenia often leads to leukopenia, and the central granulocyte count is lower than 2.0 * 10 9/L in adults and 1.8 * 65438 in children. Age 10 below 1.5 * 10 9/L is called neutropenia, and severe cases below 0.5 * 10 9/L are called agranulocytosis. Generally, mild to moderate dose reduction will not show special clinical symptoms, while severe dose reduction is prone to infection, which is serious, difficult to treat and life-threatening.
Normal value of white blood cell count (WBC):
Adult (4.0 ~10.0) ×109/l;
Children (5.0 ~12.0) ×109/l;
Newborn (15.0 ~ 20.0) ×109/l.
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