Leukemia is caused by many acquired factors other than heredity, such as infection, radiation and chemical factors. Leukemia, commonly known as "hematological tumor", is the most common malignant tumor in children, ranking first in the incidence of childhood tumors (30%). The incidence of childhood leukemia is about 3-4 people/65,438+10,000 population, with an annual increase of at least 30,000-40,000 people. Can occur at any age, mostly at 2-8 years old, boys are higher than girls. Leukemia is a malignant tumor of hematopoietic stem cells, which is characterized by the diffuse proliferation of abnormal white blood cells (leukemia cells) in bone marrow instead of normal bone marrow tissue, and often invades the surrounding blood, which changes the quantity and quality of white blood cells in the surrounding blood; Leukemia cells can widely infiltrate tissues and organs of the whole body, such as liver, spleen and lymph nodes, which often lead to anemia, bleeding and infection.
External cause is an indispensable condition for leukemia. Mainly including radiation, ultraviolet rays and other physical factors, the risk of illness increased by 3 ~ 10 times after long-term exposure; Among the chemical factors, 80% leukemia is related to environmental pollution, such as inferior furniture, decoration materials, cleaning products, paint, cadmium, asphalt, etc., which contains some harmful chemicals, such as radon, formaldehyde, benzene, ammonia, styrene, trichloroethylene, asbestos, etc. Biological factors are mainly caused by viruses and bacteria.
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