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白血病是一种造血系统的疾病,由于白细胞异常增生所致,周围血中自细胞有质和量的变化,可浸润体内各组织器官,常危及人的生命。从本质上有人认为它是造血系统的一种恶性肿瘤,预后恶劣。类白血病反应则是机体受某一致病因子刺激之后,血象中出现了类似白血病的反应(周围血中白细胞计数增高,大多可达5～10万/立方毫米,并出现幼稚白细胞)。发生类白血病的常见致病因素有严重感
Leukemia is a hematopoietic system of disease, due to abnormal proliferation of leucocytes caused by peripheral blood cells from qualitative and quantitative changes in the body can infiltrate the various tissues and organs, often endangering human life. In essence, some people think that it is a malignant tumor of the hematopoietic system, the prognosis is poor. Leukemia-like response is the body by a virulence factor stimulation, the blood appeared in a similar response to leukemia (peripheral blood leukocyte count increased, mostly up to 5 to 10 million / cubic mm, and naive white blood cells). Leukemia common occurrence of a serious risk factors