类白血病反应是指机体在一定病理因素作用下发生的类似白血病的血象反应,即外周血白细胞数明显增高(常达50×10~9/L以上),出现幼稚细胞(常在5%以上)。少数病例白细胞数可正常或减低,临床和病理检查各器官和组织无白血病细胞浸润,病理因素除去后血象则恢复正常,其预后取决于原发病,与类白血病反应本身无关;而白血病分一种白血病细 Leukemia-like response refers to the body under certain pathological factors occurred leukemia-like blood reaction, that is, the number of peripheral white blood cells was significantly increased (often up to 50 × 10 ~ 9 / L or more), naive cells (often more than 5% . A small number of cases of white blood cell count may be normal or reduced, clinical and pathological examination of various organs and tissues leukemia cell infiltration, removal of pathological factors blood returned to normal, the prognosis depends on the primary disease, and leukemia reaction itself has nothing to do; and leukemia Leukemia fine