Reporters learned from the Municipal Medical University yesterday that the latest statistics on the incidence of childhood leukemia in urban areas just completed in the recent 20 years in the prevalent ward of the Municipal Cancer Seminar indicate that children aged 0 to 14 are at high risk of leukemia, among which children aged 0 to 4 have the highest mortality rate. Experts say that chemical poisons, drugs, smoking and drinking, electromagnetic radiation and air pollution are all possible factors contributing to the high incidence of childhood leukemia. Indoor air pollution caused by indoor decoration is the most important inducement. The more luxurious decoration is, the more likely children will suffer from leukemia.
Over the past 20 years, the total incidence of leukemia in urban residents of this city has been 47.1/100,000, the total mortality rate is 27.76/100,000, the average age of onset is 43.87, and the average age of death is 45.73. The prevalence of leukemia in hematological hospitals in the 1980s showed that the incidence of leukemia was 35/100,000, which shows that the current incidence of leukemia is 3.5/100,000. Incidence rate showed an upward trend. In the past 20 years, the main types of leukemia in urban residents of this city are acute granulocytic leukemia (42.9%), followed by chronic granulocytic leukemia, acute lymphocytic leukemia and chronic lymphocytic leukemia. However, among children, acute lymphocytic leukemia is the most common type, accounting for 3% of all childhood leukemia cases. /4.
Because of the immaturity of children's autoimmune system and the lack of risk awareness of many external toxic stimuli, leukemia has become the most common malignant tumor in childhood, accounting for about 50% of children's malignant tumors. Although the cause of leukemia is still unknown, viruses may be one of the main causes of leukemia, but there is no one factor that can adequately explain the whole situation. Therefore, medical experts speculate that the onset of leukemia is not caused by a single factor, but by a combination of multiple factors. If children have some congenital susceptibility factors, coupled with the role of external factors, it may lead to leukemia. Some chemical poisons, such as pesticides, insecticides, gasoline, kerosene, decoration materials, are the main factors that easily cause leukemia. Parents take sedatives, contraceptives, antineoplastic drugs before or during pregnancy, smoke and drink alcohol. There are ionizing and electromagnetic radiation such as high-power radio and high-voltage wire near their residence, and their parents are often exposed to X-rays. Or work in the interventional room of the cardiology department of the hospital; live near the factory, gas station and main traffic road, air pollution is also prone to childhood leukemia; there are also genetic factors, when a family member has leukemia, the incidence of leukemia in close relatives is four times higher than that in ordinary people.
Among the factors causing childhood leukemia, environmental pollution, especially indoor environmental pollution, is an important inducement. Many children with leukemia have recently been decorated in their homes, and the more luxurious decoration, the more likely children to suffer from leukemia. Indoor pollutants are mainly formaldehyde, benzene, total volatile organic compounds, etc. Formaldehyde mainly comes from plywood, blockboard, medium density fiberboard and Particleboard in decoration materials. In addition, wall cloth, wallpaper, chemical fiber carpet, foam plastic, paint, paint, furniture and carpet also contain formaldehyde and have cocoa. High concentration of formaldehyde is toxic to immune system; indoor benzene pollution mainly comes from volatile organic compounds released from outdoor air pollution into indoor and indoor decoration materials; long-term exposure to low concentration of benzene can cause chronic benzene poisoning, aplastic anemia and leukemia; total volatility The main sources of such materials are organic materials such as paints, water-based coatings, adhesives, wood-based panels, foam insulation materials, plastic sheets and other building materials, as well as wallpaper and other interior decoration materials. At present, it is thought that total volatile organic compounds (VOCs) can cause imbalance of immunity and damage hematopoietic system in severe cases.
Therefore, experts say that in order to prevent childhood leukemia, parents should pay attention to their behavior in daily life. Do not expose too much to X-ray and other harmful radiation. Personnel engaged in radiation work should take personal protection and strengthen preventive measures. When using drugs, they should be careful and must have the guidance of doctors. They should not be used or abused for a long time. When decorating houses, they should purchase materials conforming to environmental protection standards and try their best to use pollution-free materials. The construction technology of dyeing or less pollution; after the house decoration is completed, do not rush to let children in, should first ask the indoor environment testing department to stop testing, listen to experts'opinions and choose the appropriate time to stay.