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白血病是造血干细胞增殖分化异常而引起的恶性增殖性疾病,我国的发病率是3~5人/10万人,高发区可达6.6人/10万人。国内外一些资料表明,目前白血病的发生率有逐年增多的趋势,而且越来越低龄化。儿童白血病是小儿恶性肿瘤中最多见的一种,好发年龄从出生到14岁,但以2~5岁多见,是5岁以上小儿死亡的主要原因之一。
Leukemia is a malignant and proliferative disease caused by the abnormal proliferation and differentiation of hematopoietic stem cells. The incidence of leukemia in our country is 3 to 5 people / 100,000 people, and the high incidence area can reach 6.6 people / 100,000 people. Some domestic and foreign data show that the current incidence of leukemia has increased year by year trend, but also getting younger age. Childhood leukemia is one of the most common malignant tumors in children, the prevalence of age from birth to 14 years old, but more common in 2 to 5 years old, is one of the major causes of death in children over the age of 5.