类白血病反应是机体处于某种疾病状况下所产生的一种造血组织异常反应.此时,周围血液中出现异常高值白细胞,或高值未成熟白细胞.类白血病反应仅指单纯白细胞系统异常,而不包括其他有形成份相似的反应.血液其他系统细胞组织,可有与类白血病反应相似机制产生的异常反应,尤其并合白细胞系统同期产生此等反应者并不少见,但不归属于类白血病反应范筹内.目前认为,类白血病反应与白细胞增多症者在某种意义上仅是“量”的区别,而与白血病却是“质”的不同.但类白血病反应患者的白细胞,依据组织学和组织化学资料来看,并不与正常白细胞相似.类白血病反应是“诱发疾病”(往称原发疾病)的特殊临床 Leukemia-like response is an abnormal reaction of hematopoietic tissue produced by the body in a disease state, in which abnormal high-value white blood cells or high-value immature white blood cells appear in the peripheral blood, and the leukemia-like reaction only refers to abnormalities of simple white blood cell system, And does not include other reactions with similar physical components.Other systemic cells in the blood may have an abnormal response to the similar mechanism of leukemia reaction, and it is not uncommon for the combined leukocyte system to produce such reactions in the same period, but not to leukemia Reaction within the scope of the current thought that leukemia reaction and leukocytosis in some sense only “volume” of the difference, but with leukemia is “qualitative.” However, leukemia patients with leukocyte response, according to the organization Learning and histochemical data, not with normal white blood cells similar to leukemia response is “induced disease” (known as the primary disease) special clinical